[Professional absenteeism and surgery for carpal tunnel syndrome. Results of a prospective series of 233 patients]

AIM

The aim of our work was to evaluate the influence of the type of patient's insurance ant the return to work interval after carpal tunnel release.

MATERIAL AND METHODS

An prospective analysis of 233 patients (18-65 years old, full time workers) undergoing a carpal tunnel release between January and June 1998 was conducted to determine the interval between surgery and return to work. For statistical analysis we used the Ms Works and Status software package. The mean return-to-work intervals were determined for the following and compared for three groups. Group 1: independent worker, n = 87; group 2: wage earner, n = 90; group 3: civil servant, n = 56; and 4 others subgroups: manual workers, n = 164; non manual workers, n = 69; patients with social security insurance, n = 191; patients with workers compensation, n = 42.

RESULTS

For the patients in group 1 the average return to work was 17 days (11 days for non manual workers, 29 days for manual workers). In group 2, the average was 35 days (21 days for non manual workers, 42 for manual workers). In group 3 the average was 56 days (49 days for non manual workers and 63 days for manual workers). The statistical analysis showed the civil servant took significantly longer to return to work than independent workers or wage earner (p < 0.05). The work related patients took significantly longer than patients covered by social security. The effect of occupational han (manual versus non manual) use was clear in the group 1 and 2, but there was no difference in the group 3.

DISCUSSION

Our study of 233 patients demonstrated significant difference between independent workers, wage earners, and civil servants in term of return-to-work intervals. In comparing manual and non manual workers, we found a significant difference in group 1 and 2, but in civil servants group non difference were found. We cannot explain these findings on medical grounds.

Can the outcome of carpal tunnel release be predicted?

Between 1994 and 1996 we performed a prospective study on the effect of carpal tunnel release on the health status of 96 patients. The Nottingham Health Profile, a validated global scoring system, was used to assess quality of life before, and at 4 months after surgery. Carpal tunnel syndrome had a significant impact on the health status of our patients. There were significant improvements in the scores for pain, energy and sleep. Patients who were dissatisfied following surgery had significantly higher pre-operative scores, indicating poor perceived health status. Our findings show that outcome assessment tools have predictive value in identifying patients who may not benefit from surgery, or in whom a poor result might be anticipated.

Endoscopic versus open surgical treatment of carpal tunnel syndrome

The impact of CTS is significant as evidenced by the fact that only back injuries result in greater rates of employee absenteeism in the workplace. CTR is now the most commonly performed surgical procedure in the United States. Earlier efforts using open surgical techniques were associated with significant morbidity, which some would argue is greater than that associated with the disease itself. The addition of endoscopy to surgeon's armamentarium offers the promise of decreased morbidity associated with the surgical treatment of CTS. Evidence indicates that when compared with open CTR, endoscopic CTR results in earlier achievement of patient satisfaction and functional outcomes. As a result, it is becoming clear that endoscopic surgery is a safe and effective method of treating CTS.

Diagnosis of carpal tunnel syndrome: electrodiagnostic and magnetic resonance imaging evaluation

In clinically diagnosed CTS without symptoms or signs to suggest other disorders that can mimic CTS, it is unclear whether performing nerve conduction studies are cost-effective. An outcome study to determine whether nerve conduction studies are necessary for the diagnosis may help to clarify this issue. Even less evidence exists regarding the cost-effectiveness of imaging for CTS. MR imaging reliably depicts normal carpal tunnel anatomic details, including the median and ulnar nerves as well as their intraneural fascicular structure. It can also identify pathologic nerve compression and mass lesions that compress nerves such as ganglion cysts. Currently, MR imaging is probably most commonly used to image patients with ambiguous electrodiagnostic studies and clinical examinations. In the near future, MR diffusion-weighted imaging should be possible for peripheral nerves. As is the case with brain imaging, diffusion-weighted imaging of peripheral nerves is likely to be the most sensitive imaging modality for the detection of early nerve dysfunction. Electrodiagnostic studies are likely to remain the pivotal diagnostic examination in patients with suspected CTS for the foreseeable future. With advances in software and hardware, however, high-resolution MR imaging of peripheral nerves should become faster, less expensive, and probably more accurate, possibly paving the way for an expanded role in the diagnosis of this common syndrome.

Intraneural median nerve pressure in carpal tunnel syndrome

In order to determine whether endoscopic carpal tunnel release decompresses the median nerve, we measured the intraneural median nerve pressure pre- and postoperatively in 55 hands. The median nerve pressure was significantly reduced postoperatively.

Relationship of workers' compensation status and duration of preoperative carpal tunnel symptoms

Carpal tunnel syndrome (CTS) is one of the most common work-related injuries and a leading cause of work disability. We studied patients from a single community who had carpal tunnel releases (CTRs), comparing duration of preoperative symptoms and severity of nerve dysfunction among workers compensation and nonworkers compensation recipients. Included in the study were 131 patients who had a total of 187 primary CTRs done by a single surgeon. Duration of preoperative symptoms was significantly longer for nonworkers compensation patients than for workers compensation patients (p < 0.01). A smaller proportion of workers compensation patients had severe electromyography (EMG) findings (p = 0.04), and a larger portion had borderline EMG findings. People with work-related CTS appear to receive surgical treatment for CTS earlier than people whose CTS is not related to work covered under workers compensation laws.

Treatment of recurrent compressive neuropathy of peripheral nerves in the upper extremity with an autologous vein insulator

The treatment of entrapment neuropathy in the upper extremity with surgical decompression has generally provided good results. Recurrence of symptoms, however, is not uncommon and its management is both challenging and difficult. Nineteen patients with recurrent carpal tunnel and cubital tunnel syndrome were treated with the vein wrapping technique using the autogenous saphenous vein. The average number of surgeries before vein wrapping was 3.3. The mean patient age was 53 years (range, 28-75 years) and the mean follow-up period was 43 months (range, 24-78 months). All patients reported reduction in pain and the sensory disturbances secondary to the compression of the median or ulnar nerve. Two-point discrimination and electrodiagnostic findings also improved.

Impact of occupational variables in carpal tunnel syndrome

OBJECTIVE

We studied the impact of work-related factors on the outcome in patients operated for carpal tunnel syndrome.

METHODS

The population consisted of 106 CTS patients who worked at the time of operation. We registered social and occupational data from the patients.

RESULTS

Median time of sick leave was 7 weeks for the total group. Sixty-four percent reported a relationship between their work and the disease. Eighty-nine percent of the operated patients returned to their previous work after operation.

CONCLUSIONS

A majority of the patients attributed the CTS-related symptoms to their occupation. Work-related factors may therefore be one possible explanation for the socioeconomical consequences of CTS. A permanent drop-out from work in more than 1 out of 10 patients after CTS treatment indicate that CTS form a substantial socioeconomical burden in the society.

[Value of several examination systems in patients with carpal tunnel syndrome. Comparison of Dellon computer-assisted sensation test with Mellesi hand status and Levine examination scheme]

The goal of the presented carpal tunnel syndrome (CTS) follow-up study was to compare the clinical value of the Millesi hand function score with the "Pressure Specifying Sensory Device" (PSSD) introduced by A. L. Dellon using self-administered patient questionnaires. 25 patients (10 male, 15 female) with an electrodiagnostically confirmed CTS were enrolled in this study, performing one preoperative and five postoperative examinations over 24 weeks. 12 of the 25 patients underwent an "open" two-portal carpal tunnel release with two minimal incisions (group OT); the other 13 patients were treated with a two-portal endoscopic carpal tunnel release (group ET). Additionally, in eleven out of the twelve patients of group OT, an epineuriotomy of the median nerve was performed during the same session. Concerning preoperative data of the Millesi score and the PSSD, no statistically significant differences were found between group OT and ET. However, preoperative comparison with the contralateral hand demonstrated a reduction in hand function of 15% and an increase in the pressure perception threshold of 41% compared to normative data could be measured with the PSSD. The subjective functional value of the hand was objectively evacuated using the Levine score. In the second postoperative week, a significant decrease in hand function could be obtained with the Millesi score in group OT. In group ET, the decrease in hand function representing the operative trauma was significantly lower than in group OT. Data of the static one- and two-point pressure perception threshold revealed a statistically significant improvement of the sensibility in both groups. The results of the Millesi score recorded at the last examination in the 24th postoperative week showed an improvement in hand function in both groups compared to preoperative data. Concerning static one- and two-point measurements with the PSSD, distinct improvements compared to the preoperative data could also be detected in both groups although significant differences between group OT and ET were evident: Data of group OT regarding the whole postoperative course demonstrate a continuous improvement in sensibility of the index finger. In contrast, the analysis of the PSSD measurements in group ET revealed an increase in all the parameters starting in the sixth postoperative week and ending with significantly worse static one- and two-point threshold measurements than in group OT. On the other hand, data of self-administered patient questionnaires using the Levine Score revealed significant improvements in hand function and reduction in pain intensity in both groups compared to preoperative results. Differences between both groups at the end of the examination course were not evident. In conclusion, the Millesi hand score with its emphasis on the motor function proved to be a reliable method to record the severity of CTS preoperatively, the severity of the surgical trauma and changes in the course of rehabilitation of the affected hand. A good correlation was found between data obtained with the Millesi Score and the self-administered patient questionnaires according to Levine. But when compared with the PSSD, both methods could not directly document the preoperative status and postoperative changes of the median nerve. Preoperative static two-point pressure threshold measurements with the PSSD confirmed their status as a screening parameter as published by A. L. Dellon. In the postoperative course of group ET, a distinct worsening in the sensibility of the index and little finger could only be detected with the PSSD before the patients noticed the onset of related symptoms.

Acute postoperative swelling after hand surgery: an exploratory, double-blind, randomised study with paracetamol, naproxen, and placebo

A model using volumetry to evaluate the effect of drugs on acute postoperative swelling after operations for primary Dupuytren's contracture (DC) and carpal tunnel syndrome (CTS) was established and validated. The temperature of the saline and time of measurement during the day influenced the volumetric readings. The error of measurement after volumetry of unoperated and operated hands after operations for DC was 0.7% and 0.6%, respectively. Naproxen (500 mg twice a day), paracetamol (1000 mg four times a day), or placebo were given postoperatively for three days to 35 patients after DC and 42 patients after CTS in a randomised, placebo-controlled study. Hand volume was measured preoperatively and 72 hours after surgery. There was a difference in swelling (p = 0.009) indicating different degree of development of swelling 72 hours postoperatively between the DC and CTS placebo groups, which invalidated pooling of the data. After operations for DC naproxen was slightly but not significantly superior to paracetamol and placebo, with paracetamol numerically superior to placebo. The power of the study, caused by the limited number of patients included, does not permit this difference to reach significance. Operations for CTS caused so little swelling that comparisons were invalidated. Naproxen treatment, irrespective of type of operation, did not require rescue analgesics, while two patients after CTS treated with paracetamol did. Two and six placebo-treated patients required rescue drugs after operations for DC and CTS, respectively. We conclude that naproxen might have a clinical relevant effect on swelling when used on minor surgery in the hand, unlike paracetamol. Naproxen might be a useful analgesic during the immediate postoperative phase.

Acute calcifying tendonitis--an unusual cause of carpal tunnel syndrome

We report a rare case of acute calcifying tendinitis resulting in acute carpal tunnel syndrome. Acute medical staff should be aware of this condition and the importance of early referral to avoid long term median nerve neuropathy.

[Preissler endoscopic carpal ligament release. Experiences from 1,000 operations]

To reduce the postoperative morbidity different methods of endoscopic carpal tunnel release have been developed since 1989. We report our results and experiences with the method described by Preissler. Since its introduction in our clinic 1995, 1,000 patients have been operated until now. Out of 477 with an electrophysiological examination, 396 patients (83%) showed no symptoms. In three cases it was necessary to change to an open approach during operation, there were no other intraoperative complications. To evaluate our results we sent a questionnaire to 32 of our patients that were operated on one hand with an open technique and on the other hand with the endoscopic technique of Preissler. The results demonstrated that the endoscopic method was significantly better. From our experience endoscopic technique for carpal tunnel release Preissler's is a safe, well accepted, easy for learning and cheap alternative to the open procedure.

Carpal tunnel release under intravenous regional or local infiltration anaesthesia

Fifteen patients with bilateral carpal tunnel syndrome underwent surgery using intravenous regional anaesthesia (IVRA) on one hand and local infiltration anaesthesia (LA) on the other. All 30 carpal tunnel releases were performed without complication. Patient tolerance for IVRA and LA was similar. Six patients preferred the LA, eight preferred IVRA and one had no preference. Tourniquet time averaged 16 minutes when LA was used and 24 minutes with IVRA (P<0.05). Use of local anaesthesia allows more expeditious surgery and limits costs, but intravenous regional anaesthesia is recommended if epineurotomy, internal neurolysis or flexor tenosynovectomy are planned.

Endoscopic carpal tunnel release and nerve conduction studies

We investigated the outcome of endoscopic carpal tunnel release (ECTR) for patients with carpal tunnel syndrome (CTS) in comparison with the results of preoperative nerve conduction studies. The compound muscle action potential (CMAP) of the abductor pollicis brevis muscle (APB) and the second lumbrical muscle (L2) was recorded following median nerve stimulation at the wrist. A total of 38 hands in 35 patients were classified into four categories. Hands with a similarly prolonged distal motor latency for the APB and L2 were classified as type I (n=25), while those with a more prolonged distal motor latency for the APB than for the L2 (>0.7 ms) were classified as type 2 (n=10). Hands with a CMAP for the APB, but not L2, were classified as type 3 (n=1), and hands with no CMAP for either the APB or L2 were classified as type 4 (n=2). After ECTR, all of the type 1 and 2 hands were improved. Patients with type 3 and type 4 hands did not show satisfactory improvement, which may have been due to anatomical variation of the recurrent motor branch of the median nerve.

Neurophysiology not required before surgery for typical carpal tunnel syndrome

Sixty-eight patients with typical carpal tunnel syndrome underwent neurophysiological investigations preoperatively, but these were not assessed until the end of the study. Open carpal tunnel release was performed and the clinical diagnosis of carpal tunnel syndrome was considered as confirmed when there was a prompt resolution of the preoperative symptoms. Sixty-three of the 68 patients responded well to surgery, three had equivocal outcomes and two did not improve, and thus were considered not to have carpal tunnel syndrome. The neurophysiological tests were normal in these two patients, but were also normal in 14 of the 63 patients who improved with carpal tunnel surgery. Preoperative neurophysiology might therefore have led to up to 14 of the 63 cases of carpal tunnel syndrome being turned down for surgery. We conclude that neurophysiological studies contribute little to the diagnosis in typical cases of carpal tunnel syndrome, and are more often confounding than of assistance.

[The diabetic hand--complications of diabetes]

Diabetes mellitus is common in Western countries. Secondary complications in various organs occur after type 1 as well as type 2 diabetes. Complications, such as nephropathy, retinopathy and neuropathy, are well known. Specific efforts to treat complications in the lower leg--"the diabetic foot"--have been emphasized. Various complications to diabetes occur also in the upper extremity and hand--"the diabetic hand"--and include not only more specific diabetic-related conditions like limited joint mobility but conditions related to the non-diabetic hand, such as trigger finger, Dupuytren's contracture and peripheral nerve compression lesions are also seen. Following surgical treatment of the latter conditions extra care of patients with diabetes mellitus--for example physiotherapy and help by an occupational therapist--may have to be provided. This review describes complications in the hand in diabetes mellitus.

Distressing upper extremity phantom limb sensation during intravenous regional anesthesia

BACKGROUND AND OBJECTIVES

The objective of this article is to describe a case of distressing upper extremity phantom limb sensation during intravenous regional anesthesia (IVRA).

CASE REPORT

A 33-year-old American Society of Anesthesiologists (ASA) status I female with an uncomplicated intrauterine gestation presented for endoscopic carpal tunnel release. Following gravity-assisted exsanguination of the vertically positioned left upper extremity, she underwent an IVRA. Within minutes of her arm being repositioned for surgery she remarked that the arm felt as if it was still in the vertical position. This sensory disturbance was described as fatiguing and exhausting. Despite reassurance and medication with intravenous narcotics, her symptoms became intolerable. Her phantom sensation disappeared upon dissipation of the IVRA.

CONCLUSIONS

There are no previous reports regarding the development of phantom phenomena during an IVRA. The occurrence of distressing phantom sensations during an otherwise adequate IVRA may be interpreted as block failure and may lead to conversion to general anesthesia. Practitioners are encouraged to consider these phenomena when performing IVRA.

Sympathetic skin response before and after surgical release of carpal tunnel syndrome

Sympathetic skin response (SSR) was performed before and 1 year after surgical release of the median nerve in 20 subjects (mean age 52.8 years) with unilateral idiopathic carpal tunnel syndrome (CTS). SSR was evoked by stimulation of the ulnar nerve at the wrist contralateral to the side with CTS, recording from the palm, third (M3) and fifth fingers, and from the third finger contralateral to the side of CTS (M3c). Before surgery, anomalies of M3 SSR were found in 8 hands (40%): M3 SSR was absent in 1 hand; and the M3c/M3 SSR largest area ratio was abnormal in 7 hands, 3 of which also had abnormal mean differences between M3 and M3c SSR latencies. M3 SSRs were not significantly modified after surgery. The absence of postsurgical improvement may be due to the poor reinnervation capacity of sympathetic fibers.

[Adiuvants in the axillary brachial plexus blockade. Comparison between clonidine, sufentanil and tramadol]

BACKGROUND

Evaluated effects of tramadol used as adiuvant in brachial plexus block and compared with clonidine and sufentanil.

METHODS

Randomized, prospectic study with 80 patients, ASA status I-II, undergoing carpal tunnel release performed under axillary plexus block with ropivacaine 0.75% 20 ml divided in 4 study groups: tramadolo 100 mg (Group T), clonidina 1.5 g/kg (Group C), sufentanil 20 g (Group S) in 5 ml. of NaCl. Control (Group F) NaCl 5 ml. Adeguacy of the block was evaluated using pinprick test ( three points scale) and a temperature test. Onset time, duration of analgesia and anesthesia were recorded. Also during the surgery the sedation score on a five-point scale was evaluated and were recorded episodes of hypotension, bradycardia, Sp02<90% and other side effects. Results are reported as median+/-SD. For statistical analysis ANOVA test, Bonferroni test and c2 test were used.

RESULTS

Onset time of anesthesia showed significant difference between three study groups than control group, while no significant differences was recordered between groups S, C and T (S: 11+/-7 min; C: 12+/-4 min; T: 14+/-8 min; F: 20+/-11 min.). Same results were obtained among duration of anesthesia and analgesia, that were lower in F group. An adeguate quality of block for surgery was obtained in 79 patients. Only one patients of F group needed surgical infiltration. A significant difference was recordered among quality of anesthesia between group F and other three study groups. Highest sedation score was noted in C and S groups. Significantly highest incidence of bradycardia and hypotension episodes were observed in group C.

CONCLUSIONS

The use of tramadol as adiuvant provides a significative redution of onset time. Also provides a prolongation of anesthesia and analgesia with a quality of block similar that obtained with clonidine and sufentanil and a lower incidence of side effects of clonidine (sedation, bradycardia and hypotension) and sufentanil(itch and sedation). We conclude that tramadol may be a useful alternative, as adiuvant in periferic block, with same effects of other drugs commonly used and a lower incidence of side effects.

Predictors of outcomes of carpal tunnel release

OBJECTIVE

To identify factors that are predictive of the outcomes of greatest importance to patients-i.e., symptom relief, functional improvement, and satisfaction with the outcomes of surgery-following carpal tunnel release.

METHODS

We analyzed data from the Maine Carpal Tunnel Study, a community-based study of the outcomes of treatment for carpal tunnel syndrome. In a cohort of patients who underwent carpal tunnel release, a preoperative physical examination was performed and questionnaires were completed preoperatively and at 6, 18, and 30 months postoperatively. The questionnaires assessed symptom severity, upper extremity functional limitations, mental health, general physical health status, the relative severity of individual symptoms, satisfaction with the results of surgery, sociodemographic factors, and for those subjects who were in the workforce, aspects of the work environment. The associations between preoperative factors and the 3 principal outcomes (symptom severity, upper extremity functional limitations, and satisfaction with the results of surgery, all evaluated at 18 months postoperatively) were assessed with bivariate and multivariate linear regression and logistic regression analyses.

RESULTS

Two hundred forty-one subjects were enrolled and 188 (78%) completed followup surveys 18 months postoperatively. Two-thirds of the patients reported being completely or very satisfied with the outcomes of surgery at 6, 18, and 30 months postoperatively. A range of clinical and work-related variables were associated with outcomes. In multivariate analyses, greater preoperative upper extremity functional limitation was predictive of greater functional limitations postoperatively. Worse mental health status was significantly associated with more severe symptoms and lower satisfaction. Alcohol use was also associated with more severe symptoms and lower satisfaction. Among workers, involvement of an attorney was significantly associated with greater functional limitation, more severe symptoms, and lower satisfaction. Recipients of worker's compensation who did not hire an attorney had generally good outcomes. Of note, physical examination parameters were not predictive of the outcomes of surgery.

CONCLUSION

The outcomes of carpal tunnel release in community-based practices are excellent. Predictors of the outcomes of surgery are disease-specific and generic clinical factors as well as work-related factors. The strongest predictors of less favorable outcomes are worse scores on patient-reported measures of upper extremity functional limitation and mental health status, alcohol use, and the involvement of an attorney. Clinicians should carefully evaluate patients' functional status, mental health status, health habits, and attorney involvement prior to performing carpal tunnel release, and discuss with patients the prognostic implications of these parameters.

Carpal tunnel sonography by the rheumatologist versus nerve conduction study by the neurologist

OBJECTIVE

To determine the value of sonography (SG) performed by the rheumatologist to diagnose carpal tunnel syndrome (CTS).

METHODS

Sixty-three patients with clinical signs of CTS according to the neurologist, based on patient history and clinical examination, were studied. In the 6 weeks prior to surgery, SG was performed by a rheumatologist and nerve conduction study (NCS) was assessed. Improvement of initial complaints of 90% or more 3 months after surgery was considered to be the post-hoc gold standard for the diagnosis of CTS.

RESULTS

After surgery, 47 patients (75%) experienced > or = 90% relief of complaints. Mean cross sectional area of the median nerve for patients with CTS was 11.3 mm2 compared to 6.1 mm2 in the control group. The sensitivity to detect CTS was 0.70 for SG and 0.98 for NCS, and specificity was 0.63 for SG and 0.19 for NCS. Positive predictive value was 0.85 for SG and 0.78 for NCS; negative predictive value was 0.42 for SG and 0.75 for NCS. Accuracy was 0.68 for SG and 0.78 for NCS.

CONCLUSION

CTS can be identified by SG less sensitively but more specifically than by NCS.

[Klippel-Trenaunay syndrome as a rare cause of carpal tunnel syndrome--case report]

The case of a 12-year-old girl with Klippel-Trénaunay syndrome and the signs of median nerve entrapment is reported. A cavernous haemangioma surrounding the median nerve is thought to be responsible for the carpal tunnel syndrome through mechanical compression and ischemic damage to the nerve due to the changed haemodynamic situation in the carpus.

Carpal tunnel syndrome in patients on long-term haemodialysis

The purpose of this study was to describe the pathophysiology of carpal tunnel syndrome (CTS) in patients on long-term haemodialysis. We examined 110 patients, who had been having haemodialysis for chronic renal failure and had CTS, to clarify the clinical features and electrophysiological changes in peripheral nerves. There was a significant correlation between the incidence of CTS and the duration of haemodialysis. Compared with idiopathic CTS, CTS caused by long-term haemodialysis had relatively limited postoperative improvement. Symptoms recurred postoperatively in 11 patients (19%) of those with CTS caused by long-term haemodialysis. Electrophysiological measurements of sensory nerve conduction velocity showed that it was slower in distal segments of the median nerve in patients on haemodialysis compared with normal volunteers. Nerve conduction velocity in the carpal tunnel was significantly delayed (p < 0.05) in the patients with CTS on long-term haemodialysis. N9-13 interpeak latencies were significantly longer (p < 0.05) in subjects who had had haemodialysis for at least 10 years. All the patients with advanced destructive spondyloarthropathy had longer N9-13 interpeak latency. These results suggest that CTS in patients on long-term haemodialysis has its basis in neuropathy. The clinical course of CTS in these patients is different from that of patients with idiopathic CTS, because the neuropathy involves not only the carpal tunnel region, but also the proximal part of the median nerve both diffusely and progressively.

[Surgery of the carpal tunnel reviewed by an expert]

INTRODUCTION

The author of this article, who is a hand surgeon and who was appointed to serve at the French Supreme Court in the capacity of expert in assessing cases of medical malpractice examined 357 cases over a 6-year period, and was alarmed at the high incidence of carpal tunnel cases, i.e., 20 in all. The legal and medical aspects of the cases in question have been described.

MATERIAL

Six cases have been described in detail, and the medical approach in each instance has been commented on and severely criticized. The judgement that was handed down has been included.

DISCUSSION

Following this examination, an analysis has been made of the reasons for the instances of medical malpractice. Nearly three-quarters of the cases were directly related to disagreements between medical colleagues or to poor patient management, i.e., the lack of experience in a surgical context. In a quarter of the surgical procedures, technical errors were involved, e.g., nerve section, infection, or further unnecessary surgery.

CONCLUSION

The author states that the surgeon should fulfill three main obligations towards the patient: providing the necessary therapeutic means; in all instances ensuring that the patient is fully informed prior to surgery; and also ensuring maximum security. He should act in a truly professional capacity, and be capable of crisis management.