Sympathectomy for palmar hyperhidrosis is effective, but has risks associated with surgery and a permanent non-sweating hand, which may become hyperkeratotic, with fissuring and scaling.
"Sympathectomy is a technique about which we have limited knowledge, applied to disorders about which we have little understanding." Associate Professor Robert Boas, Faculty of Pain Medicine of the Australasian College of Anaesthetists and the Royal College of Anaesthetists, The Journal of Pain, Vol 1, No 4 (Winter), 2000: pp 258-260
The amount of compensatory sweating depends on the patient, the damage that the white rami communicans incurs, and the amount of cell body reorganization in the spinal cord after surgery.
Other potential complications include inadequate resection of the ganglia, gustatory sweating, pneumothorax, cardiac dysfunction, post-operative pain, and finally Horner’s syndrome secondary to resection of the stellate ganglion.
www.ubcmj.com/pdf/ubcmj_2_1_2010_24-29.pdf
After severing the cervical sympathetic trunk, the cells of the cervical sympathetic ganglion undergo transneuronic degeneration
After severing the sympathetic trunk, the cells of its origin undergo complete disintegration within a year.
http://onlinelibrary.wiley.com/doi/10.1111/j.1439-0442.1967.tb00255.x/abstract
Other potential complications include inadequate resection of the ganglia, gustatory sweating, pneumothorax, cardiac dysfunction, post-operative pain, and finally Horner’s syndrome secondary to resection of the stellate ganglion.
www.ubcmj.com/pdf/ubcmj_2_1_2010_24-29.pdf
After severing the cervical sympathetic trunk, the cells of the cervical sympathetic ganglion undergo transneuronic degeneration
After severing the sympathetic trunk, the cells of its origin undergo complete disintegration within a year.
http://onlinelibrary.wiley.com/doi/10.1111/j.1439-0442.1967.tb00255.x/abstract
Monday, August 26, 2013
Thursday, August 15, 2013
Cilio-spinal center can extend to T5
The ciliospinal reflex (pupillary-skin reflex) consists of dilation of the ipsilateral pupil in response to pain applied to the neck, face, and upper trunk. If the right side of the neck is subjected to a painful stimulus, the right pupil dilates (increases in size 1-2mm from baseline). This reflex is absent in Horner's syndrome and lesions involving the cervical sympathetic fibers. The enhanced ciliospinal reflex in asymptomatic patients with cluster headache is due to preganglionic sympathetic mechanisms.
http://en.wikipedia.org/wiki/Ciliospinal_reflex
The cilio-spinal center is not sharply confined to TI spinal level, but may extend downwards as low as T5
Saturday, August 10, 2013
Endoscopic sympathectomy is not minimally invasive - doing an operation through a smaller incision is not necessarily less invasive
The term ‘‘minimally invasive surgery’’ was initially applied to coelioscopic procedures such as laparoscopic cholecystectomy and hernia repair, thoracoscopic sympathectomy, and arthroscopy, but has since been abandoned, because doing the same operation through a smaller incision is not necessarily less invasive. The term ‘‘minimally invasive parathyroidectomy’’ does not fully convey the nature of the techniques, and, as previously debated in the wider field of minimal-access surgery, carries connotations of increased safety that are not necessarily supported by the existing data [12].
Surg Clin N Am 84 (2004) 717–734
F. Fausto Palazzo, MS, FRCS(Gen),
Leigh W. Delbridge, MD, FACS*
Department of Surgery, Royal North Shore Hospital, Sydney 2065, NSW, Australia
Leigh W. Delbridge, MD, FACS*
Department of Surgery, Royal North Shore Hospital, Sydney 2065, NSW, Australia
Saturday, August 3, 2013
progressive hemifacial atrophy following sympathectomy for hyperhidrosis
Some authors consider the disease a variant of mor- phea because the histologic changes are identical to deep scleroderma.2 The possible etiologies include sympathetic denervation, trauma, vascular malformations, immunologic abnormality, heredi- tary disease, or infection by a slow virus.3 To our knowledge, this is the first report of a young patient with a possible association between Parry-Romberg syndrome and thoracoscopic sympathectomy.
Theoretically, thoracoscopic sympathectomy may cause 2 of the aforementioned etiologies of Parry- Romberg syndrome: sympathetic denervation and trauma. Thoracoscopic sympathectomy is a surgical technique for the treatment of palmar hyperhidrosis.
The operation ablates the upper thoracic sympa- thetic nerve ganglions responsible for nerve stimu- lation of the sweat glands of the upper limbs. The most significant complication is Horner’s syn- drome, which results from injury to the stellate sympathetic ganglion.7 In a summary of sympa- thectomies in 67 children and adolescents, compli- cations included Horner’s syndrome in 1 patient (1%) and varying degrees of compensatory sweat- ing in 30 patients (45%).8 Despite the evidence from animal studies that sympathectomy can result in facial atrophy, to our knowledge, there were no previous reports of such an association in humans.
Cutis. 2004;73:343-344, 346.
Thursday, August 1, 2013
RSD due to nerve injury
According to the National Institute of Neurological Disorders and Stroke (NINDS), RSD is "a chronic pain condition that is believed to be the result of dysfunction in the central or peripheral nervous systems." According to MedicineNet, RSD involves "irritation and abnormal excitation of nervous tissue, leading to abnormal impulses along nerves that affect blood vessels and skin."
Animal studies indicate that norepinephrine, a catecholamine released from sympathetic nerves, acquires the capacity to activate pain pathways after tissue or nerve injury, resulting in RSD. Another theory suggests that RSD, which follows an injury, is caused by triggering an immune response and symptoms associated with inflammation (redness, warmth, swelling). RSD is not thought to have a single cause, but rather multiple causes producing similar symptoms.
http://arthritis.about.com/od/rsd/a/rsd.htm
Tuesday, July 23, 2013
Sunday, July 21, 2013
Sympathetic chain ganglia are responsible for delivering information to the rest of the body regarding stress situations and the fight or flight response
Sympathetic chain ganglia are responsible for delivering information to the rest of the body regarding stress situations and the fight or flight response. These sympathetic ganglia are the structures that are destroyed during a sympathectomy.
http://www.ast.org/publications/Journal%20Archive/2009/9_September_2009/CE.pdf
http://www.ast.org/publications/Journal%20Archive/2009/9_September_2009/CE.pdf
After sympathectomy in rats there is an increase in osteoclast-mediated bone resorption as well as an increase in the number of osteoclasts on the sympathectomized side
Paper: Osteoclastic Activation In Periapical Lesions After NPY Knockout (IADR/AADR/CADR 87th General Session and Exhibition (April 1-4, 2009)): "After sympathectomy in rats there is an increase in osteoclast-mediated bone resorption as well as an increase in the number of osteoclasts on the sympathectomized side compared to the control. These findings suggest an inhibitory effect of the SNS on bone resorption via osteoclasts. Our objective was to determine if an SNS mediator, neuropeptide Y (NPY), affects osteoclastic activity after pulpal exposure."
Two-stage unilateral versus one-stage bilateral single-port sympathectomy for palmar and axillary hyperhidrosis
Compensatory sweating occurred in 25 (19%) patients of the one-stage group and in 6 (4%) of the two-stage group (P = 0.0001). No patients developed Horner’s syndrome.
CONCLUSIONS: Both two-stage unilateral and one-stage bilateral single-port video-assisted thoracoscopic sympathectomies are effective, safe and minimally invasive procedures. Two-stage unilateral sympathectomy can be performed with a lower occurrence of compensatory sweating, improving permanently the quality of life in patients with palmar and axillary hyperhidrosis.
http://icvts.oxfordjournals.org/content/16/6/834.full.pdf+html
CONCLUSIONS: Both two-stage unilateral and one-stage bilateral single-port video-assisted thoracoscopic sympathectomies are effective, safe and minimally invasive procedures. Two-stage unilateral sympathectomy can be performed with a lower occurrence of compensatory sweating, improving permanently the quality of life in patients with palmar and axillary hyperhidrosis.
http://icvts.oxfordjournals.org/content/16/6/834.full.pdf+html
Depletion of peripheral sympathetic noradrenaline led to significant decrements in escape and avoidance responding
PsycNET - Option to Buy: "Chemical sympathectomy and avoidance learning in the rat.
By Di Giusto, E. L.; King, M. G.
Journal of Comparative and Physiological Psychology, Vol 81(3), Dec 1972, 491-500.
Abstract
Reports results of 5 experiments with male Wistar rats (N = 108). Depletion of peripheral sympathetic noradrenaline induced by administration of 6-hydroxydopamine, ip, led to significant decrements in escape and avoidance responding when the required response was difficult, but not when it was relatively easy to acquire. Results are similar to previous findings obtained with adrenal-demedullated Ss. Findings clarify the role of the sympathetic nervous system in the motivation of behavior elicited by aversive stimulation. Implications for 2-process theory and the "Kamin effect," or "learned helplessness," are discussed. (40 ref.) (PsycINFO Database Record (c) 2012 APA, all rights reserved)"
By Di Giusto, E. L.; King, M. G.
Journal of Comparative and Physiological Psychology, Vol 81(3), Dec 1972, 491-500.
Abstract
Reports results of 5 experiments with male Wistar rats (N = 108). Depletion of peripheral sympathetic noradrenaline induced by administration of 6-hydroxydopamine, ip, led to significant decrements in escape and avoidance responding when the required response was difficult, but not when it was relatively easy to acquire. Results are similar to previous findings obtained with adrenal-demedullated Ss. Findings clarify the role of the sympathetic nervous system in the motivation of behavior elicited by aversive stimulation. Implications for 2-process theory and the "Kamin effect," or "learned helplessness," are discussed. (40 ref.) (PsycINFO Database Record (c) 2012 APA, all rights reserved)"
sympathectomy led to significant decrements in escape and avoidance responding
PsycNET - Option to Buy: "Chemical sympathectomy and avoidance learning in the rat.
By Di Giusto, E. L.; King, M. G.
Journal of Comparative and Physiological Psychology, Vol 81(3), Dec 1972, 491-500.
Abstract
Reports results of 5 experiments with male Wistar rats (N = 108). Depletion of peripheral sympathetic noradrenaline induced by administration of 6-hydroxydopamine, ip, led to significant decrements in escape and avoidance responding when the required response was difficult, but not when it was relatively easy to acquire. Results are similar to previous findings obtained with adrenal-demedullated Ss. Findings clarify the role of the sympathetic nervous system in the motivation of behavior elicited by aversive stimulation. Implications for 2-process theory and the "Kamin effect," or "learned helplessness," are discussed. (40 ref.) (PsycINFO Database Record (c) 2012 APA, all rights reserved)"
By Di Giusto, E. L.; King, M. G.
Journal of Comparative and Physiological Psychology, Vol 81(3), Dec 1972, 491-500.
Abstract
Reports results of 5 experiments with male Wistar rats (N = 108). Depletion of peripheral sympathetic noradrenaline induced by administration of 6-hydroxydopamine, ip, led to significant decrements in escape and avoidance responding when the required response was difficult, but not when it was relatively easy to acquire. Results are similar to previous findings obtained with adrenal-demedullated Ss. Findings clarify the role of the sympathetic nervous system in the motivation of behavior elicited by aversive stimulation. Implications for 2-process theory and the "Kamin effect," or "learned helplessness," are discussed. (40 ref.) (PsycINFO Database Record (c) 2012 APA, all rights reserved)"
Saturday, July 20, 2013
Hyperhidrosis (excessive sweating). DermNet NZ
Hyperhidrosis (excessive sweating). DermNet NZ: "Localised hyperhidrosis may also be due to:
Stroke
Spinal damage
Peripheral damage
Surgical sympathectomy
Neuropathy
Brain tumour
Chronic anxiety disorder"
Stroke
Spinal damage
Peripheral damage
Surgical sympathectomy
Neuropathy
Brain tumour
Chronic anxiety disorder"
Right sympathectomy was associated with a 372% increase in PI (p < 0.0001), and left sympathectomy with a 316% increase in PI
Oximetry-derived perfusion index for intraop... [Ann Thorac Surg. 2005] - PubMed - NCBI: "Baseline oximetric waveforms were adequate in all subjects. Right was associated with a 372% increase in PI (p < 0.0001), and left with a 316% increase in PI (p < 0.029). This occurred as early as 1 minute after transection of the sympathetic chain. The PI in the reference probes as well as the hemodynamics remained constant."
Thursday, July 11, 2013
Link between skin innervation and neuropathic pain
Nerve conduction studies for large-diameter motor and sensory nerves were normal. This report documents a pure small-fibre sensory neuropathy after prolonged use of linezolid, and the relationship between skin innervation and corresponding neuropathic pain.
Journal of Neurology, Neurosurgery, and Psychiatry 2008;79:97-99
Journal of Neurology, Neurosurgery, and Psychiatry 2008;79:97-99
Impaired skin vasomotor reflexes have been found in patients with sympathetic dystrophies, dysautomias, post-regional sympathectomy and diabetic neuropathies
Not surprisingly, diminished vasoconstrictor responses, similar to the current findings, have been found
in patients with sympathetic dystrophies [26], dysautomias [27], post-regional sympathectomy [28] and
diabetic neuropathies [11].
Additionally, there have been a few reports of EM patients benefitting from sympathectomy or neurolitic
irreversible blocks of the lumbar sympathetic ganglia [22,23], while others have found the symptoms of EM to be aggravated by such treatment [24,25], possibly as a result of denervation supersensitivity.
Clinical Science (1999) 96, 507ñ512 (Printed in Great Britain)
Roberta C. LITTLEFORD, Faisel KHAN and Jill J. F. BELCH
University Department of Medicine, Section of Vascular Medicine and Biology, Ninewells Hospital and Medical School,
Dundee DD1 9SY, Scotland, U.K.
in patients with sympathetic dystrophies [26], dysautomias [27], post-regional sympathectomy [28] and
diabetic neuropathies [11].
Additionally, there have been a few reports of EM patients benefitting from sympathectomy or neurolitic
irreversible blocks of the lumbar sympathetic ganglia [22,23], while others have found the symptoms of EM to be aggravated by such treatment [24,25], possibly as a result of denervation supersensitivity.
Clinical Science (1999) 96, 507ñ512 (Printed in Great Britain)
Roberta C. LITTLEFORD, Faisel KHAN and Jill J. F. BELCH
University Department of Medicine, Section of Vascular Medicine and Biology, Ninewells Hospital and Medical School,
Dundee DD1 9SY, Scotland, U.K.
Tuesday, July 9, 2013
Sympathectomy interrupts neural messages that ordinarily would travel to many different organs, glands and muscles.
Sympathectomy involves dissection of the main sympathetic trunk in the upper thoracic region thus interrupting neural messages that ordinarily would travel to many different organs, glands and muscles. It involves division of adrenergic, cholinergic and sensory fibers which elaborate adrenergic substances during the process of regulating visceral function.
Journal of Applied Sciences Research, 6(6): 659-664, 2010
Journal of Applied Sciences Research, 6(6): 659-664, 2010
Monday, July 8, 2013
Vascular sympathetic denervation can lead to degeneration of the smooth muscle of arteries leading to medial arterial calcification and stiffening of the arteries
Sympathetic denervation of the peripheral arterial system may occur quite early in the evolution of neuropathy and has major effects on blood flow and vascular responses and causes structural changes in the arterial wall (Edmonds 2004). Vascular sympathetic denervation can lead to degeneration of the smooth muscle of arteries leading to medial arterial calcification and stiffening of the arteries. This calcification may assume the histological characteristics of bone.
Unilateral lumbar sympathectomy in humans, both in diabetics and non-diabetics, has been show to result in medial wall calcification on the ipsilateral side (Goebel and Fuessl 1983). Unilateral sympathectomy in animals leads to excess deposition of cholesterol on the operated side and the occurrence of cholesterol sclerosis in the rabbit's aorta was accelerated by removal of the coeliac ganglion (Harrison 1938). Furthermore, in animal models, denervation of smooth muscle leads to striking pathological changes, including atrophy of muscle fibres with foci of degeneration (Kerper and Collier 1926). Arterial calcification in initiated within senescent atrophic smooth muscle (Morgan 1980).
Medial arterial calcification in the Pima Indians is significantly associated with an increased prevalence of cardiovascular mortality (Everhart et al 1988). Medial calcification may be important factor in development of peripheral vascular disease, which in diabetes shows a predilection for the distal arteries below the knee and is unexplained. Chantelau reported an association of below knee atherosclerosis to medial arterial calcification (Chantelau et al. 1995).
p. 653
Autonomic Failure: A Textbook of Clinical Disorders of the Autonomic Nervous System[Hardcover]
Christopher J. Mathias (Author), Roger Bannister (Author)- Publisher: Oxford University Press, USA; 5 edition (July 24, 2013)
- Language: English
- ISBN-10: 0198566344
- ISBN-13: 978-0198566342
sympathectomy leads to fluctuation of vasoconstriction alternated with vasodilation in an unstable fashion
"To quote Nashold, referring to sympathectomy, "Ill- advised surgery may tend to magnify the entire symptom complex"(38). Sympathectomy is aimed at achieving vasodilation. The neurovascular instability (vacillation and instability of vasoconstrictive function), leads to fluctuation of vasoconstriction alternated with vasodilation in an unstable fashion (39). Following sympathectomy the involved extremity shows regional hyper - and hypothermia in contrast, the blood flow and skin temperature on the non- sympathectomized side are significantly lower after exposure to a cold environment (39). This phenomenon may explain the reason for spread of CRPS. In the first four weeks after sympathectomy, the Laser Doppler flow study shows an increased of blood flow and hyperthermia in the extremity (40). Then, after four weeks, the skin temperature and vascular perfusion slowly decrease and a high amplitude vasomotor constriction develops reversing any beneficial effect of surgery (39). According to Bonica , "about a dozen patients with reflex sympathetic dystrophy (RSD) in whom I have carried out preoperative diagnostic sympathetic block with complete pain relief, sympathectomy produced either partial or no relief (40)"
Chronic Pain:
Reflex Sympathetic Dystrophy : Prevention and ManagementTuesday, July 2, 2013
we stopped performing sympathectomies in 1994, since we were alarmed by the complication and failure rate
Physical medicine
Russell, Alan L. Patient Care 13.2 (Feb 2002): 19.
Sunday, June 30, 2013
Several reports have dealt with the alteration of antibody responses of spleen and lymph nodes following sympathectomy
http://www.ncbi.nlm.nih.gov/pubmed/8528891
Impairment of heart action following various methods of surgical denervation
A considerable variation in the distribution of fibres from the left sympathetic trunk to the right heart and from the right sympathetic trunk to the left side of the heart has also been shown (Randall et al., 1968a). However, the normal pattern is that large sympathetic nerves reach the base of the heart anteriorly and descend on either side of the main pulmonary artery. Nerves descending on the right of the pulmonary artery go to the atria and right ventricle.
Interruption of afferent and efferent innervation of the heart also produces a response from circulatory and renal systems.
Surgical cardiac denervation was carried out in 25 greyhounds and their responses to exercise, propranolol, and atropine were observed between one and three months afterwards. Our experiments confirm that a denervated heart shows delayed and diminished response to exercise and no response to atropine and propranolol.
Interruption of afferent and efferent innervation of the heart also produces a response from circulatory and renal systems.
Surgical cardiac denervation was carried out in 25 greyhounds and their responses to exercise, propranolol, and atropine were observed between one and three months afterwards. Our experiments confirm that a denervated heart shows delayed and diminished response to exercise and no response to atropine and propranolol.
Impairment of heart action following various methods of surgical denervation
T. J. OTTO' and P. C. CHEAH
The Nuffield Unit of Clinical Physiology, Department of Surgery, Royal Postgraduate Medical School, Ducane Road, London, W.12
Thorax(1970),25,199.
T. J. OTTO' and P. C. CHEAH
The Nuffield Unit of Clinical Physiology, Department of Surgery, Royal Postgraduate Medical School, Ducane Road, London, W.12
Thorax(1970),25,199.
Sympathectomy significantly alters vascular responses
Vascular responses to warming were studied in hemiplegic patients and after sympathectomy, using venous occlusion plethysmography of foot and leg. Comparisons were made with corresponding age groups. The pattern of response was essentially unchanged in hemiplegic patients, but was altered substantially where sympathetic pathways had been interrupted.
Vasomotor Responses in the Extremities of Subjects with Various Neurologic Lesions
I. Reflex Responses to Warming
- WALTER REDISCH, M.D.;
- FRANCISCO T. TANGCO, M.D.;
- LOTHAR WERTHEIMER, M.D.;
- ARTHUR J. LEWIS, M.D.;
- J. MURRAY STEELE, M.D.;
- Dorothy Andrews, B.A.,
Sympathectomy involves division of adrenergic, cholinergic and sensory fibers which elaborate adrenergic substances during the process of regulating visceral function
G. SURGICAL SYMPATHECTOMY AND ADRENERGIC FUNCTIONPharmacol Rev March 1966 18:611-618;
Thursday, June 27, 2013
Sympathectomy (ETS or ESB) can alleviate social phobia and common fears such as fear of flying, heights, open spaces or the darkness
Is sympathectomy the new lobotomy?
"ESB may also alleviate social phobia and common fears such as fear of flying, heights, open spaces, or the darkness. In addition, it can be used to decrease trembling of the body, hands, and voice, even stuttering. It may help in alcoholism or drug withdrawal, because these are often linked with social anxiety. Sympathetic block is a gentle and exact endoscopic procedure. It is performed as day surgery under light anesthesia."
from the website of Dr T. Telaranta, Finnland, who performs sympathectomy for a variety of conditions.
"ESB may also alleviate social phobia and common fears such as fear of flying, heights, open spaces, or the darkness. In addition, it can be used to decrease trembling of the body, hands, and voice, even stuttering. It may help in alcoholism or drug withdrawal, because these are often linked with social anxiety. Sympathetic block is a gentle and exact endoscopic procedure. It is performed as day surgery under light anesthesia."
from the website of Dr T. Telaranta, Finnland, who performs sympathectomy for a variety of conditions.
Saturday, June 22, 2013
Intense pain, reduced inspiratory capacity following sympathectomy
Patrícia Gomes da Silva, Daniele Cristina Cataneo, Fernanda Leite, Erica Nishida Hasimoto, Guilherme Antonio Moreira de Barros
Postgraduate Program in Anesthesiology, Botucatu School of Medicine, UNESP, Bauru, SP, Brazil.
PURPOSE To compare analgesia traditionally used for thoracic sympathectomy to intrapleural ropivacaine injection in two different doses. METHODS Twenty-four patients were divided into three similar groups, and all of them received intravenous dipyrone. Group A received intravenous tramadol and intrapleural injection of saline solution. Group B received intrapleural injection of 0.33% ropivacaine, and Group C 0.5% ropivacaine. The following aspects were analyzed: inspiratory capacity, respiratory rate and pain. Pain was evaluated in the immediate postoperative period by means of the visual analog scale and over a one-week period. RESULTS In Groups A and B, reduced inspiratory capacity was observed in the postoperative period. In the first postoperative 12 hours, only 12.5% of the patients in Groups B and C showed intense pain as compared to 25% in Group A. In the subsequent week, only one patient in Group A showed mild pain while the remainder reported intense pain. In Group B, half of the patients showed intense pain, and in Group C, only one presented intense pain. CONCLUSION Intrapleural analgesia with ropivacaine resulted in less pain in the late postoperative period with better analgesic outcomes in higher doses, providing a better ventilatory pattern.
Monday, June 17, 2013
Brachial plexopathy is another well recognised but not much publicised side-effect of sympathectomy
Brachial plexus dysfunction (brachial plexopathy) is a form of peripheral neuropathy. It occurs when there is damage to the brachial plexus, an area on each side of the neck where nerve roots from the spinal cord split into each arm's nerves.
Damage to the brachial plexus is usually related to direct injury to the nerve, stretching injuries (including birth trauma), pressure from tumors in the area (especially from lung tumors), or damage that results from radiation therapy.
Brachial plexus dysfunction may also be associated with:
- Birth defects that put pressure on the neck area
- Exposure to toxins, chemicals, or drugs
- General anesthesia, used during surgery
- Inflammatory conditions, such as those due to a virus or immune system problem
In some cases, no cause can be identified.
Symptoms
- Numbness of the shoulder, arm, or hand
- Shoulder pain
- Tingling, burning, pain, or abnormal sensations (location depends on the area injured)
- Weakness of the shoulder, arm, hand, or wrist
Monday, April 8, 2013
cardiovascular effects, tremulousness and sweating produced by thyroid hormones can be reduced or abolished by sympathectomy
Although, plasma catecholamine levels are normal in hyperthyroidism, the cardiovascular effects, tremulousness and sweating produced by thyroid hormones can be reduced or abolished by sympathectomy. (p. 133)
Introduction To Endocrinology
Wednesday, March 20, 2013
Trouble in the Gap: A Bioethical and Sociological Analysis of Informed Consent for High-Risk Medical Procedures - Springer
Trouble in the Gap: A Bioethical and Sociological Analysis of Informed Consent for High-Risk Medical Procedures - Springer: "we argue that “informed” consent is a process that is usually incomplete, despite trappings and assumptions that help to create the illusion of completeness."
Thursday, March 7, 2013
Wednesday, March 6, 2013
In the setting of sympathectomy, interference with any of the effectors evokes immediate, precipitous declines in blood pressure
"From the finding that removal of the sympathetic nerves did not affect blood pressure much, Cannon inferred that the sympathetic nervous system did not contribute to blood pressure in intact, undisturbed organism. In the 1980s, however, several reports showed that sympathectomy compensatorily activates other effectors, such as the renin-angiotensin-aldosterone system, the vasopressin system, and the adrenal medulla, and compensatory activation of these effectors maintains blood pressure at approximately normal levels. In the setting of sympathectomy, interference with any of the effectors evokes immediate, precipitous declines in blood pressure. Because Cannon was so firmly convinced of the functional unity of the sympathoadrenal system, which would be activated only in emergencies, he never considered adequately the possibility that the sympathetic nervous system might indeed contribute to levels of blood pressure and other monitored variables under resting conditions."
Adrenaline and the Inner World: An Introduction to Scientific Integrative Medicine
Saturday, January 19, 2013
after sympathectomy "the extremity will be more apt to have disturbance of circulation and is left unprotected from fluctuation in circulation"
1. Sympathectomy is analogous to the act of killing the messenger. The sympathetic nervous system has the critical job of properly controlling and preserving the circulation in different parts of the body, especially in the extremities. By paralyzing the system, the extremity will be more apt to have disturbance of circulation and is left unprotected from fluctuation in circulation.
Sympathectomy is similar to permanently removing the central heat and air-conditioning system and never replacing it because of malfunction.
Sympathectomy permanently damages the temperature regulatory system. The reason sympathectomy does not cause side effects other than ineffective control of pain as well as impotence and orthostatic hypotension is because it is invariably partial and incomplete.H. Hooshmand, M.D.: Chronic Pain9780849386671
Chronic Pain: Reflex Sympathetic Dystrophy Prevention and Management
Hooshang Hooshmand
ISBN 10: 0849386675 / 0-8493-8667-5
ISBN 13: 9780849386671
Publisher: CRC Pr I Llc
Publication Date: 1993
Binding: Hardcover
ISBN 13: 9780849386671
Publisher: CRC Pr I Llc
Publication Date: 1993
Binding: Hardcover
Saturday, January 12, 2013
The effect of dysfunction of the autonomic nervous system on experienced feelings and emotions
Hohmann, G.W. : The effect of dysfunction of the autonomic nervous system on experienced feelings and emotions
Paper read at Conference on Emotions and Feelings at New School for Social Research, New York, Oct 1962.
Sherrington, C.S.: Experiments on the value of vascular and visceral factors for the genesis of emotion
Proc. Roy.Soc., 1900, 66, 390-403
Wenger, M.A.: Emotion as visceral action: an extension of Lange's theory. In Reymert, M.L., Feelings and emotions: the Moosehart ymposium, New York: McGraw-Hill, 1950. Pp.3-10.
Wynne, L.C., and Solomon, R.L.: Traumatic avoidance learning: acquisition and extinction in dogs deprived of normal peripheral autonomic function.
Genet. psychol. Monogr., 1955, 52, 241-84
Landis, C., and Hunt, W. A. Adrenalin and emotion.
Psychol. Rev., 1932, 39, 467-85.
Schachter, S., and Wheeler, L.: Epinephrine, chlorpromazine, and amusement.
J. of abnorm. soc. Psychol., 1962, 65, 121-28.
Friday, January 4, 2013
Complications of endoscopic sympathectomy - hypoxia, hypotension, haemothorax, pneumothorax
"there are some potentially serious anaesthetic sequelae. Despite the use of various analgesic techniques, including intrapleural bupivacaine and systemic opioids, postoperative chest pain is a common and distress- ing feature, with a duration of 12 hours or more.
In a recent prospective study of 58 patients undergoing this procedure, Jedeikin et al reported hypoxia (with an arterial oxygen saturation of 70%) and hypotension (with decrease in arterial pressure to < 50mmHg) as uncommon but important complications.
'These events maybe the result of compression of the mediastinum and major vessels by carbondioxide insufflation. In addition, during bilateral procedures, lesser degrees of hypoxia were common place with deflation of the lung on the second side, despite apparently adequate reinflation of the first lung. 15% of patients had pneumothorax and 7% required underwater drainage for haemothorax or pneumothorax."
A C QUINN R E EDWARDS PJNEWMAN W J FAWCETT
BMJ VOLUME 306 26JUNE1993
In a recent prospective study of 58 patients undergoing this procedure, Jedeikin et al reported hypoxia (with an arterial oxygen saturation of 70%) and hypotension (with decrease in arterial pressure to < 50mmHg) as uncommon but important complications.
'These events maybe the result of compression of the mediastinum and major vessels by carbondioxide insufflation. In addition, during bilateral procedures, lesser degrees of hypoxia were common place with deflation of the lung on the second side, despite apparently adequate reinflation of the first lung. 15% of patients had pneumothorax and 7% required underwater drainage for haemothorax or pneumothorax."
A C QUINN R E EDWARDS PJNEWMAN W J FAWCETT
BMJ VOLUME 306 26JUNE1993
Thursday, January 3, 2013
It has been shown in animals that sympathectomy of one side of the body leads to an increase in the development of tumors on the denervated side
Coujard R, Heitz F. Cancerologic: Production de tumeurs malignes consecutives a des lesions des fibres sympathiques du nerf sciatique chez le Cobaye. C R Acad Sci 1957; 244: 409-411.
Besedovsky H, DelRey A, Sorkin E, DaPrada M, Keller H. Immunoregulation mediated by the sympathetic nervous system. Cellular Immun 1979; 48:346-355.
Stein-Werblowsky R. The sympathetic nervous system and cancer. Exper Neuro 1974; 42:97-100.
Delrey A, Besedovsky H, Sorkin E, DaPrada M, Arrenbrecht S. Immunoregulation mediated by the sympathetic nervous system, II. Mol Immunol 1981; 63:329-334.
Wednesday, January 2, 2013
in the absence of autonomic arousal, behavior that appears emotional will not be experienced as emotional
"In the presence of a barking dog, for example, the sympathectomized cats manifested almost all of the signs of feline rage. Finally, Cannon notes the report of Dana (1921) that a patient with a spinal-cord lesion and almost totally without visceral sensation still manifested emotionality.
For either the Jamesian or the present formulation such data are crucial, since both views demand visceral arousal as a necessary condition for emotional arousal. When faced with this evidence, James's defenders (e.g., Wenger, 1950; Mandler, 1962) have consistently made the point that the apparently emotional behavior manifested by sympathectomizied animals and men is well-learned behavior, acquired long before sympathectomy. There is a dual implication in this position: first, that sympathetic arousal facilitates the acquisition of emotional behavior, and second, that sympathectomized subjects act but do not feel emotional. There is a small but growing evidence supporting these contentions. Wynne and Solomon (1955) have demonstrated that sympathectomized dogs acquire an avoidance response considerably more slowly than control dogs. Further, on extinction trials most of their 13 sympathectomized animals extinguished quickly, whereas not a single one of the 30 control dogs gave any indication of extinction over 200 trials. Of particular interest are two dogs who were sympathectomized after they had acquired the avoidance response. On extinction trials these two animals behaved precisely like the control dogs - giving no indication of extinction. Thus, when deprived of visceral innervation, animals are quite slow in acquiring emotionally-linked avoidance responses and in general, quick to extinguish such responses." (p. 163)
"A line of thought stimulated by the Wynne and Solomon (1955) and the Hohmann (1962) studies may indeed be the answer to Cannon's observations that there can be emotional behavior without visceral activity. From the evidence of these studies, it would appear, first, that autonomic arousal greatly facilitates the acquisition of emotional behavior but it is not necessary for its maintenance if the behavior is acquired prior to sympathectomy; and second, that in the absence of autonomic arousal, behavior that appears emotional will not be experienced as emotional." (p. 167)
Psychobiological Approaches to Social Behavior
P. Herbert Leiderman, David Shapiro, Harvard Medical School. Dept. of Psychiatry, United States. Office of Naval Research - 1964 - 203 pagesSunday, December 16, 2012
Recurrent hyperhidrosis is another potential side effect from hyperhidrosis surgery
The Society of Thoracic Surgeons Expert Consensus for the Surgical Treatment of Hyperhidrosis -- Cerfolio et al. 91 (5): 1642 -- The Annals of Thoracic Surgery: "Recurrent hyperhidrosis is another potential side effect from hyperhidrosis surgery. Incidence rates vary considerably and have been described as 0% to 65%"
'via Blog this'
'via Blog this'
The Society of Thoracic Surgeons Expert Consensus for the Surgical Treatment of Hyperhidrosis -- Cerfolio et al. 91 (5): 1642 -- The Annals of Thoracic Surgery
The Society of Thoracic Surgeons Expert Consensus for the Surgical Treatment of Hyperhidrosis -- Cerfolio et al. 91 (5): 1642 -- The Annals of Thoracic Surgery: "Because the goal of this procedure is to improve quality of life, complications should be minimal and essentially eliminated. The primary side effects of hyperhidrosis surgery include CH, bradycardia, and Horner's syndrome. It is important for patients to be aware, however, of all of the possible complications that can occur. In general, "the higher the level of blockade on the chain, the higher is the expected regret rate" [26]."
'via Blog this'
'via Blog this'
Tuesday, December 11, 2012
The vasodilating effect of spinal dorsal column stimulation is mediated by sympathetic nerves - Springer
The vasodilating effect of spinal dorsal column stimulation is mediated by sympathetic nerves - Springer: "Immediately after sympathectomy, the contralateral right arm became increasingly cold and cyanotic and the patient complained of chronic painful coldness and severe cold-intolerance in the right arm. Attempts to pharmacologically vasodilate the arm with felodipine did not affect the local vasoconstriction and pain. Dorsal column stimulation (associated with symmetrical paraesthesia in both arms) induced an immediate and marked (ten-fold) increase in skin blood flow in the right arm (and in the leg), whereas skin blood flow in the left arm remained unaffected. The lack of vasomotor response in the left arm was not due to maximal vasodilatation at rest, since skin blood flow in the left arm showed a normal capacity for axon reflex vasodilatation following antidromic activation of sensory afferents. The results suggest that the marked vasodilatation induced by dorsal column stimulation is mediated by sympathetic vasomotor fibres, via modulation of central neuronal circuits involved in the regulation of skin sympathetic discharge."
'via Blog this'
'via Blog this'
Sunday, December 2, 2012
Transection below T8-T10 is not accompanied by reflex sweating
Reflex sweating in patients with spina... [Arch Phys Med Rehabil. 1977] - PubMed - NCBI: "Sweat glands derive their innervation from the sympathetic nervous system. The spinal sympathetic structures that are located in the intermediolateral areas extend from T1-L2 segments and are under the control of hypothalamic centers. Cord transection abolishes the supraspinal control of sudorimotor function. Since sympathetic innervation does not follow a clear segmental distribution, normal sweating may be preserved at a higher or lower level than skin sensation. Nonthermoregulatory reflex sweating is an indication of unchecked spinal cord facilitation and is precipitated by afferent stimuli from bladder, rectum, and various other sources. It is usually a manifestation of mass reflex or autonomic crisis and occurs particularly in cervical or high thoracic lesions. Transection below T8-T10 is not accompanied by reflex sweating. The phenomenon of thermal relfex sweating is controversial. Although some aspects of nonthermoregulatory reflex sweating are still unclear, proper immediate and continuing preventive management will reduce the incidence of this and other autonomic manifestations. "
'via Blog this'
'via Blog this'
Monday, November 26, 2012
Hemodynamic changes in vertebral and carotid arteries were observed after sympathicotomy for hyperhidrosis
T3 sympathicotomy segment was the most frequent transection done (95.83%), as only ablation (25%) or in association with T4 (62.50%) or with T2 (8.33%). It was observed increase in RI and PI of the common carotid artery (p < 0.05). The DPV of internal carotid artery decreased in both sides (p < 0.05). The SPV and the DPV of the right and left vertebral arteries also increased (p < 0.05). Asymmetric findings were observed so that, arteries of the right side were the most frequently affected.
CONCLUSIONS: Hemodynamic changes in vertebral and carotid arteries were observed after sympathicotomy for PH. SPV was the most often altered parameter, mostly in the right side arteries, meaning significant asymmetric changes in carotid and vertebral vessels. Therefore, the research findings deserve further investigations to observe if they have clinical inferences.
http://www.ncbi.nlm.nih.gov/pubmed/16186983
Monday, November 19, 2012
Gustatory sweating, flushing and other responses after sympathectomy
Gustatory sweating on the head, neck and arms, often occurs after cervico-thoracic sympathectomy. Haxton (1948) reported an incidence of 36 percent, the same as in the present series. It was thought that some information about regeneration in the cervical sympathetic might be revealed by investigation of this surgical curiosity.
Although sweating is the common gustatory response after cervical sympathectomy, other changes are experienced. Haxton (1948) described associated paresthesia and flushing, gooseflesh may occur (Herxheimer, 1958) and vaso-constriction is reported in this paper. These occur together or separately and occasionally sweating might be absent. The subject has been confused by comparison with post-parotidectomy gustatory sweating which has a different mechanism (Glaister et al.,1958; Bloor, 1958).
Sweating is produced by cholinergic sympathetic fibres. In normal individuals both vasocontriction and gooseflesh are adrenergic. This also holds in gustatory responses. Figure 2 shows blocking of sweating by atropine, whilst gooseflesh continues unchanged.
The tingling sensations were described as being unlike normal sensation, and likened to plucking out of hair. In one patient in was so unpleasant that she refused to take a test stimulus. Flushing usually occurs on the upper chest and neck, and is an erythema with sharp demarcation, not associated with a rise in skin temperature.
Of the patients, 29 were found to have gustatory responses, and 24 were studied in detail. Of 22 patients with sweating who could be studied, 11 had gooseflesh, 10 tingling, 6 flushing, and 4 vasoconstriction. Four patients, however, had no sweating and their gustator responses consisted of gooseflesh and tingling in one, tingling alone, and flushing in two. None of these four showed vasoconstriction.
The stimulus for testing used was usually Worcester sauce, but specificity of the response was sometimes great, and one patient reacted only to boiled sweets made by one particular firm.
Sweating is produced by cholinergic sympathetic fibres. In normal individuals both vasocontriction and gooseflesh are adrenergic. This also holds in gustatory responses. Figure 2 shows blocking of sweating by atropine, whilst gooseflesh continues unchanged.
The tingling sensations were described as being unlike normal sensation, and likened to plucking out of hair. In one patient in was so unpleasant that she refused to take a test stimulus. Flushing usually occurs on the upper chest and neck, and is an erythema with sharp demarcation, not associated with a rise in skin temperature.
Of the patients, 29 were found to have gustatory responses, and 24 were studied in detail. Of 22 patients with sweating who could be studied, 11 had gooseflesh, 10 tingling, 6 flushing, and 4 vasoconstriction. Four patients, however, had no sweating and their gustator responses consisted of gooseflesh and tingling in one, tingling alone, and flushing in two. None of these four showed vasoconstriction.
The stimulus for testing used was usually Worcester sauce, but specificity of the response was sometimes great, and one patient reacted only to boiled sweets made by one particular firm.
http://brain.oxfordjournals.org/content/92/1/137.extract &
http://ang.sagepub.com/content/17/3/143.extract
http://ang.sagepub.com/content/17/3/143.extract
Wednesday, November 14, 2012
No compensatory sweating after botulinum toxin treatment of palmar hyperhidrosis
No compensatory sweating after botulinum toxin... [Br J Dermatol. 2005] - PubMed - NCBI: "Recordings were made at 16 skin areas and compared with subjective estimates of sweating.
RESULTS:
Following treatment, palmar evaporation decreased markedly and then returned slowly towards pretreatment values, but was still significantly reduced 6 months after treatment. No significant increase of sweating was found after treatment in any nontreated skin area.
CONCLUSIONS:
Successful treatment of palmar hyperhidrosis with botulinum toxin does not evoke compensatory hyperhidrosis in nontreated skin territories."
'via Blog this'
RESULTS:
Following treatment, palmar evaporation decreased markedly and then returned slowly towards pretreatment values, but was still significantly reduced 6 months after treatment. No significant increase of sweating was found after treatment in any nontreated skin area.
CONCLUSIONS:
Successful treatment of palmar hyperhidrosis with botulinum toxin does not evoke compensatory hyperhidrosis in nontreated skin territories."
'via Blog this'
Monday, November 12, 2012
not exposing patients to the risk of experiencing the side effects of sympathectomy
The use of oxybutynin for treating ... [An Bras Dermatol. 2011 May-Jun] - PubMed - NCBI: "Treatment of facial hyperhidrosis with oxybutynin is a good alternative to sympathectomy, since it presents good results and improves quality of life, in addition to not exposing patients to the risk of experiencing the side effects of sympathectomy."
'via Blog this'
'via Blog this'
Sunday, November 4, 2012
A randomized placebo-controlled trial of oxybuty... [J Vasc Surg. 2012] - PubMed - NCBI
A randomized placebo-controlled trial of oxybuty... [J Vasc Surg. 2012] - PubMed - NCBI: "Palmar and axillary hyperhidrosis improved in >70% of the patients, and 47.8% of those presented great improvement. Plantar hyperhidrosis improved in >90% of the patients. Most patients (65.2%) showed improvements in their quality of life. The side effects were minor, with dry mouth being the most frequent (47.8%).
CONCLUSIONS:
Treatment of palmar and axillary hyperhidrosis with oxybutynin is a good initial alternative for treatment given that it presents good results and improves quality of life."
CONCLUSIONS:
Treatment of palmar and axillary hyperhidrosis with oxybutynin is a good initial alternative for treatment given that it presents good results and improves quality of life."
Saturday, November 3, 2012
bilateral sympathectomy may cause bowel, bladder, or sexual dysfunction
If regional sympathetic blockade provides relief, surgical sympathectomy can be considered. Initial pain relief may be significant, but symptoms tend to recur over the next 2 to 5 years.[53] This is believed to occur owing to incomplete surgical removal of all sympathetic innervation to the extremity. Collateral reinnervation can occur, but bilateral sympathectomy may cause bowel, bladder, or sexual dysfunction.[14]
It is possible to disrupt the sympathetic chain ganglion by treatments other than surgery. Ablation with radiofrequency devices and caustic chemicals (such as alcohol) have been described, but the region of necrosis may expand beyond the ganglion and long-term results are unknown.[59,][69] As such, surgical sympathectomy is considered strictly as a last resort.
Knee Disorders: Surgery, Rehabilitation, Clinical Outcomes By Frank R. Noyes, MD
Monday, October 22, 2012
Stellate ganglion block may relieve hot flashes by interrupting the sympathetic nervous system
Stellate ganglion block may relieve hot flash... [Med Hypotheses. 2007] - PubMed - NCBI: "the wide range of conditions that have been reported to respond favorably to stellate ganglion block suggest that its effectiveness may not be solely the result of increased blood flow nor restricted just to its sphere of innervation. We have found that stellate ganglion block is effective in the treatment of hot flashes in postmenopausal women, as well as those with estrogen depletion resulting from breast cancer treatment. Based on evidence that hot flashes may be centrally mediated and that the stellate ganglion has links with the central nervous system nuclei that modulate body temperature, we hypothesize that the stellate ganglion block provides relief of hot flashes by interrupting the central nervous system connections with the sympathetic nervous system, allowing the body's temperature-regulating mechanisms to reset. If this mechanism can be confirmed, this would provide women with intractable hot flashes with an effective, potentially long-lasting means of relieving their symptoms, and potentially widen the range of indications for stellate ganglion block to include other centrally mediated syndromes."
'via Blog this'
'via Blog this'
Sunday, October 21, 2012
patients with palmar hyperhidrosis have no overactivity of the sympathetic nerve
HR and BP at rest and cardiovascular response to exercise were similar in patients with palmar hyperhidrosis before ETS and in the normal control population. Therefore, we consider that patients with palmar hyperhidrosis have no overactivity of the sympathetic nerve. However, because bilateral ETS causes the suppression of cardiovascular response to exercise, patients that has been treated with ETS need to be observed during high-level exercise.
http://iars.org/abstracts/browsefile/browse.asp?command=N&absnum=45&dir=S190
Friday, October 19, 2012
These observations further emphasize our ignorance of the mechanisms responsible for primary hyperhidrosis and of the effect of sympathetic ablation
"These observations further emphasize our ignorance of the mechanisms responsible for primary hyperhidrosis and of the effect of sympathetic ablation on the function of the remaining sympathetic system."
"Only investigators who deviate from accepted standards innovate and thus advance science. Obviously, such deviations may also result in disasters;"
Statement made by the former President of the International Society of Sympathetic Surgery, and ETS surgeon, Moshe Hashmonai (Invited Commentary)
Endoscopic Lumbar Sympathectomy Following Thoracic Sympathectomy in Patients with Palmoplantar Hyperhidrosis
World J Surg (2011) 35:54–55 DOI 10.1007/s00268-010-0809-5
Tuesday, October 16, 2012
thoracoscopic left cardiac sympathectomy results in remodelling of cardiac sympathetic innervation
1Division of Cardiovascular Medicine, University of Iowa Hospitals and Clinics, 200 Hawkins Dr, 4434 JCP, Iowa City, IA 52242, USA and
2Department of Cardiothoracic Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
*Corresponding author. Tel: þ1 301 641 6062; fax: þ1 319 338 5263,
Received 23 November 2009; accepted after revision 4 February 2010
2Department of Cardiothoracic Surgery, University of Iowa Hospitals and Clinics, Iowa City, IA, USA
*Corresponding author. Tel: þ1 301 641 6062; fax: þ1 319 338 5263,
Received 23 November 2009; accepted after revision 4 February 2010
Tuesday, September 25, 2012
Sympathectomy results in a significant interference in regulatory processes of the body
"ESB (whether as ETS as ETSC or ELS) generally represents a substantial interference in regulatory processes of the body. Therefore decision for this operation requires that previously conservative treatments were made. An ESB is therefore at the end of a treatment history, and never at the beginning."
Dr. Christoph H. Schick, ETS surgeon, President of the International Society of Sympathetic Surgery (ISSS)
text has been translated by google from German
http://www.dhhz.de/index.php?page=8&subPage=§ion=32
Post-sympathectomy pain
Postsympathectomy limb pain, postsympathectomy parotid pain, and Raeder's paratrigeminal syndrome are pain states associated with the loss of sympathetic fibres and in particular with postganglionic sympathetic lesions. There is a characteristic interval of about 10 days between surgical sympathectomy and onset of pain. It is proposed that this pain in man is correlated with the delayed rise in sensory neuropeptides seen in rodents after sympathectomy. These chemical changes probably reflect the sprouting of sensory fibres and may result from the greater availability of nerve growth factor after sympathectomy. The balance between the sensory and sympathetic innervations of a peripheral organ may be determined by competition for a limited supply of nerve growth factor.
Lancet. 1985 Nov 23;2(8465):1158-60
http://www.ncbi.nlm.nih.gov/pubmed/2414615?dopt=Abstract
Saturday, September 1, 2012
Surgical treatment for hyperhidrosis causes hyperhidrosis...
Localised hyperhidrosis may also be due to:
▪ Stroke
▪ Spinal nerve damage
▪ Peripheral nerve damage
▪ Surgical sympathectomy
▪ Neuropathy
▪ Brain tumour
▪ Chronic anxiety disorder
http://www.dermnet.org.nz/hair-nails-sweat/hyperhidrosis.html
Sympathectomy to treat the urge to smoke
Lipov, Eugene (Chicago, IL, US) treating addiction with disruption of the sympathetic chain.
Friday, August 31, 2012
Complications of surgical (Thoracic and Lumbar) Sympathectomy
Post-sympathectomy neuralgia - pain overlying the scapula
Compensatory sweating - involving the lover back or face
Pneumothorax
Bleeding due to azygos vein or intercostal artery injury
Winged scapula due to long thoracic nerve injury (p. 517)
Mastery of Vascular and Endovascular Surgery
Gerald B. Zelenock, Thomas S. Huber, Louis M. Messina, Alan B. Lumsden, Gregory L. Moneta
Lippincott Williams & Wilkins, 15/12/2005 - 900 pages
Thursday, August 30, 2012
The custom of a majority is no guarantee of safety and is seldom a guide to best medical practice.
Cameron`s claim that there has been only one death attributable to synchronous bilateral thoracoscopic sympathectomy is implausible. Surgeons and anaesthetists are reticent in publicizing such events and Civil Law Reports of settled cases are an inadequate measure of the current running total. The custom of a majority is no guarantee of safety and is seldom a guide to best medical practice.
Jack Collin,
Consultant Surgeon
Oxford
http://www.bmj.com/content/320/7244/1221?tab=responses
Subscribe to:
Comments (Atom)