Inflammatory response after laparoscopic and conventional colorectal resections – results of a prospective randomized trial

Background: Short-term benefits of laparoscopic relative to conventional colorectal resections have been demonstrated in randomized controlled trials. It has been suggested that a diminished cytokine and acute-phase response may be responsible for these advantages. Methods: In a randomized controlled trial, patients underwent laparoscopic (n=30) or conventional (n=30) resection of colorectal tumors. Plasma levels of interleukin-1 receptor antagonist (IL-1RA), interleukin-6 (IL-6), interleukin-10 (IL-10), and C-reactive protein (CRP) were analyzed repeatedly. Postoperative peak levels and area under the curve values were calculated and compared between groups using the Mann-Whitney U-test. Results: Patient characteristics, preoperative cytokine, and CRP plasma levels were not different between each group. Postoperative peak concentrations of IL-6 (P=0.05) and CRP (P<0.001) and the overall postoperative plasma concentrations of IL-6 (P=0.03) and CRP (P=0.002) were lower in the laparoscopic than in the conventional group. Peak and overall IL-1RA (P=0.2; P=0.2) and IL-10 (P=0.4; P=0.6) plasma concentrations, respectively, were not different between groups. Conclusions: IL-6 and CRP plasma levels were lower after laparoscopic than conventional colorectal resections. The less intense inflammatory response may be an indicator of the milder surgical trauma inflicted by laparoscopic than conventional colorectal resection. Received: 31 March 1999; in revised form: 15 July 1999 Accepted: 20 August 1999     

Transvaginal hybrid NOTES cholecystectomy—results of a randomized clinical trial after 6 months

Introduction

For cholecystectomy (CHE), both the needlescopic three-trocar technique with 2–3-mm instruments (needlescopic cholecystectomy (NC)) and the umbilically assisted transvaginal technique with rigid instruments (transvaginal cholecystectomy (TVC)) have been established for further reduction of the trauma remaining from laparoscopy.

Methods

To compare the further outcome of both techniques for elective CHE in female patients, we analyzed the secondary end points of a prospective randomized single-center trial (needlescopic versus transvaginal cholecystectomy (NATCH) trial; ClinicalTrials.gov Identifier: NCT0168577), in particular, satisfaction with aesthetics, overall satisfaction, abdominal pain, and incidence of trocar hernias postoperatively at both 3 and 6 months. After 3 months, the domains “satisfaction” and “pain” of the German version of the Female Sexual Function Index (FSFI-d) were additionally evaluated to detect respective complications. A gynecological control examination was conducted in all TVC patients after 6 months.

Results

Forty patients were equally randomized into the therapy and the control groups between February 2010 and June 2012. No significant differences were found for overall satisfaction with the surgical result, abdominal pain, sexual function, and the rate of trocar hernias. However, aesthetics were rated significantly better by TVC patients both after 3 and after 6 months (P?=?0.004 and P?<?0.001). There were no postoperative pathological gynecological findings.

Conclusions

Following TVC, there is a significantly better aesthetic result as compared to NC, even at 3 and 6 months after the procedure. No difference was found for sexual function.     

Subjective and objective outcomes 1 year after robotic-assisted laparoscopic sacrocolpopexy

We aimed to assess the subjective and objective outcomes 1 year after robotic sacrocolpopexy using a type I polypropylene mesh. This was a case series of 64 patients who underwent a robotic-assisted laparoscopic sacrocolpopexy using a type I monofilament polypropylene mesh coated with hydrophilic porcine collagen. Objective and subjective outcomes were assessed using the pelvic organ prolapse quantification (POP-Q), the short forms of the Pelvic Floor Impact Questionnaire (PFIQ 7) and the Pelvic Floor Distress Inventory (PFDI-20). Outcome measures were collected pre-operatively and 1 year post-operatively on all but one patient, who was lost to follow-up. Paired comparisons between pre- and post-operative outcomes were performed using the Wilcoxon signed rank test. At 1 year, POP-Q stage II or greater and loss of follow-up were considered to be surgical failure. The “surgical cure” rate was 89%. We observed three distal anterior failures, two distal posterior failures and one apical failure, and one patient was lost to follow-up. We found significant differences between pre- and post-operative POP-Q measurements (p < 0.001) and PFDI-20/PFIQ-7 total scores (p < 0.001). Robotic sacrocolpopexy using this polypropylene mesh resulted in significant improvements in subjective and objective outcome measures at 1 year.     

Gastrointestinal symptoms and patient satisfaction more than 1?year after laparoscopic Nissen fundoplication

Background  

Symptoms from poorly controlled gastroesophageal reflux disease (GERD) such as heartburn and regurgitation often resolve after laparoscopic Nissen fundoplication. Unfortunately, new gastrointestinal symptoms such as bloating may occur for some patients. Accurate data regarding the gastrointestinal symptoms experienced by patients who have had a laparoscopic fundoplication may help patients to make more informed decisions about pursuing surgery for their reflux disease.     

Subjective and objective results 1 year after robotic sacrocolpopexy using a lightweight Y-mesh

Introduction and hypothesis

The objective of this study was to assess outcomes following robotic sacrocolpopexy using a lightweight polypropylene Y-mesh.

Methods

During our study period, all patients who underwent robotic sacrocolpopexy were enrolled in this single-arm prospective trial. Endpoints included Pelvic Organ Prolapse Quantification (POP-Q) values; Pelvic Floor Distress Inventory, short form 20 (PFDI-20); Pelvic Floor Impact Questionnaire, short form 7 (PFIQ-7); Surgical Satisfaction scores; and the Sandvik Incontinence Severity Index. All surgeries were performed with a pre-configured monofilament type 1 polypropylene Y-mesh (Alyte©, C.R. Bard, Covington, GA, USA). Cure rates at 12 months were calculated using two separate definitions: (1) “clinical cure”: no POP-Q points?>?0, point C ≤ ?5, no prolapse symptoms on the PFDI-20, and no reoperations for prolapse and (2) “objective anatomic cure”: POP-Q stage 0 or 1, point C of ≤ ?5, and no reoperations for prolapse.

Results

A total of 150 patients underwent robotic sacrocolpopexy and 143 (95 %) were available for 12-month follow-up. Mean age was 58.6 ± 9.8 and mean body mass index was 26.3 ± 4.5. Mean operative time and blood loss were 148?±?27.6 min (range 75–250 min) and 51.2?±?32, respectively. There were no mesh erosions or exposures, and mesh edges were not palpable in any patient. At 12 months the clinical cure rate was 95 %, and the objective anatomic cure rate was 84 %. The PFDI-20 mean score improved from 98 at baseline to 17 at 12 months (p?<?0.0001); PFIQ-7 scores improved from 59 to 6.5 (p?<?0.0001).

Conclusions

Robotic sacrocolpopexy using this lightweight polypropylene Y-mesh offers excellent subjective and objective results at 1 year.     

How does dexamethasone influence surgical outcome after laparoscopic Nissen fundoplication? A randomized double-blind placebo-controlled trial

Laparoscopic floppy Nissen fundoplication (LFNF) is an effective treatment for gastroesophageal reflux disease. The duration of convalescence, after noncomplicated LFNF, may depend on several factors of which pain, fatigue and sociocultural factors are the most important. Nausea and vomiting occur mainly on the day of operation. Glucocorticoids are well known for their analgesic, anti-inflammatory, immune-modulating and antiemetic effects. We therefore undertook the present study to investigate whether preoperative dexamethasone could improve surgical outcome in patients undergoing uncomplicated laparoscopic floppy Nissen fundoplication. From March 2005 to April 2008, 82 patients were randomized to receive dexamethasone (8 mg) intravenously, 90 min before skin incision or saline (placebo). Patients received a similar standardized anesthetic, surgical and multimodal analgesic treatment. The primary end points were pain and fatigue. Preoperatively and at several times during the first 24 postoperative hours, we measured C-reactive protein (CRP), interleukin-6 and 1 (IL-6, IL-1), pain scores and nausea, and the number of vomiting episodes were registered. Dexamethasone significantly reduced postoperative levels of CRP (p = 0.01), IL-6 and IL-1 (p < 0.05), fatigue (p = 0.01) and overall pain during the first 24 postoperative hours (p < 0.05) and the total requirement of analgesic (ketorolac) (p < 0.05). Dexamethasone also reduced nausea and vomiting on the day of operation (p < 0.05). Preoperative dexamethasone (8 mg) reduced pain, fatigue, nausea and vomiting in patients undergoing uncomplicated LNF when compared with placebo.     

Loss to follow-up after laparoscopic gastric bypass surgery – a post hoc analysis of a randomized clinical trial

BackgroundFollow-up after bariatric surgery is important if we are to identify long-term complications at an early stage and thereby improve long-term outcome. Despite great efforts, many patients are lost to follow-up. Definition of characteristics of patients failing to attend follow-up could help in defining a specific group for whom extra resources may be applied to improve the situation.ObjectivesTo identify characteristics of patients failing to attend follow-up 2 years after laparoscopic gastric bypass surgery.SettingMulticenter study, Sweden.MethodsPost hoc analysis of a randomized clinical trial in which preoperative patient characteristics and postoperative outcome measures were compared between patients who attended or did not attend a 2-year follow-up visit after laparoscopic gastric bypass surgery.ResultsOf the 2495 patients included, 260 did not attend a 2-year follow-up visit. Factors associated with higher risk for failure to attend were younger age (adjusted odds ratio [OR] .96, 95% confidence interval [CI] .94–.98/yr, P < .001); male sex (adjusted OR 2.34, 95% CI 1.51–3.63, P < .001); depression (adjusted OR 1.61, 95% CI 1.05–2.47, P = .029); history of smoking (adjusted OR 1.78, 95% CI 1.26–2.51, P = .001); being single (adjusted OR 1.47, 95% CI 1.03–2.11, P = .036); and being first-generation immigrant (adjusted OR 1.74, 95% CI 1.05–2.88; P = .032). Elementary occupation (adjusted OR .42, 95% CI .18–.99, P = .047) was associated with lower risk.ConclusionThese findings indicate that there are preoperative characteristics that may help in identifying patients likely to fail to attend follow-up visits after laparoscopic gastric bypass surgery. Special effort should be made to inform these patients of the importance of follow-up and to encourage them to attend.     

Comparison of two different matrix-based autologous chondrocyte transplantation systems: 1 year follow-up results

Purpose  

The treatment of full-thickness cartilage defects of the knee is a common problem in orthopaedic surgery. Autologous chondrocyte transplantation (ACT) is one of the few reliable treatment options of cartilage defects with good long-term outcomes. The improvement of ACT led to the matrix-based ACT (MACT). The purpose of the study was to compare two different commercially available MACT systems.     

Prevalence and predictors of double incontinence 1 year after first delivery

Introduction and hypothesis

Urinary (UI) and anal incontinence (AI) are common pelvic floor disorders (PFD), and postpartum women experiencing double incontinence (DI), the combination of UI and AI, tend to have more severe symptoms and a greater impact on quality of life. Our objective was to investigate the prevalence and predictors of postpartum DI and UI alone 1 year after first delivery.

Methods

In this prospective cohort study, 976 women reported the prevalence of DI and UI alone 1 year after their first delivery in one of two hospitals in Norway using the St Marks score and the ICI-Q UI SF.

Results

DI was significantly reduced from 13% in late pregnancy to 8% 1 year later, whereas 30% reported UI at both time points. Incontinence in late pregnancy predicted incontinence 1 year after delivery. Higher age was associated with UI alone. Compared with caesarean delivery, normal vaginal or instrumental delivery increased the risk of UI alone more than three and four times respectively. Obstetric anal sphincter injuries showed a four-fold increase in the risk of DI.

Conclusions

Nearly 50% reported incontinence symptoms 1 year after first delivery. Continence status during pregnancy was one of the main predictors of postpartum continence status. Mode of delivery increased the risk of postpartum UI, whereas obstetric anal sphincter injuries increased the risk of postpartum DI.

     

Bowel obstruction after laparoscopic and open colon resection for cancer: Results of 5?years of follow-up in a randomized trial

Background

Postoperative bowel obstruction caused by intra-abdominal adhesions occurs after all types of abdominal surgery. It has been suggested that the laparoscopic technique should reduce the risk for adhesion formation and thus for postoperative bowel obstruction. This study was designed to compare the incidence of bowel obstruction in a randomized trial where laparoscopic and open resection for colon cancer was compared.

Methods

A retrospective analysis was performed, collecting data of episodes of bowel obstruction with or without surgery. Only episodes treated in the hospital where the index surgery took place were included. Data for 786 patients were collected for the 5-year period after cancer surgery.

Results

Baseline characteristics for the evaluated laparoscopic (n?=?383) and open (n?=?403) groups were comparable. The cumulative obstruction percentages at 5?years for the open and laparoscopic groups were 6.5 and 5.1% respectively and did not significantly differ from each other. Tumor stage seemed to influence the risk for bowel obstruction: 2.8% in stage I, 6.6% in stage II, and 7% in stage III, but the differences were not significant.

Conclusions

This analysis does not support the hypothesis that laparoscopy leads to fewer episodes of bowel obstruction compared with open surgery.     

Adjustable gastric band surgery or medical management in patients with type 2 diabetes and obesity: three-year results of a randomized trial

BackgroundFew randomized trials have compared surgical versus lifestyle and pharmacologic approaches for type 2 diabetes (T2D) patients with mild to moderate obesity.ObjectivesThis study examined resolution of hyperglycemia (A1C <6.5% and fasting glucose <126 mg/dL) 3 years after randomization to either a laparoscopic adjustable gastric band (LAGB) or 1-year diabetes and weight management (DWM) program.SettingUniversity medical center, United States.MethodsForty T2D patients (mean ± SD: age, 51.3 ±10.0 yr; weight 109.5 ± 15.0 kg; body mass index [BMI] 36.5 ± 3.7 kg/m²; HBA1C 8.2% ± 1.2%) were randomized to LAGB (n = 18) or DWM (n = 22).ResultsAt 3 years, 13% of 16 patients in LAGB and 5% of 17 patients in DWM achieved resolution of hyperglycemia (P = .601), with a modestly greater reduction in antidiabetic medications in the surgical group (P = .054). Reductions from baseline in A1C were sustained at 3 years in LAGB (?.82% [95% CI: ?1.62 to ?.01], P = .046) compared with DWM (+.23% [95% CI: ?.57 to 1.03], P = .567). The surgical group had greater weight loss (?12.0 kg [95% CI: ?15.9 to ?8.1] versus ?4.8 [95% CI: ?8.6 to ?.9], P = .010). HDL-cholesterol increased more after surgery (P = .003), but changes in triglycerides, LDL-cholesterol, and blood pressure did not differ between treatments. Diabetes- and obesity-specific quality of life improved comparably with both therapies.ConclusionsAchievement of American Diabetes Association targets for glucose, lipids, and blood pressure was similar with both treatment strategies. LAGB leads to greater sustained weight loss and higher HDL cholesterol compared with a DWM program. These findings may help guide patients with T2D and obesity when exploring options for diabetes and weight management.     

Complications and reoperations after laparoscopic sacrocolpopexy with a mean follow-up of 4 years

Introduction and hypothesis

There is a lack of knowledge concerning long-term reoperation and complications after laparoscopic sacrocolpopexy (LSCP). We analyzed the rates and indications and potential risk factors for reoperation after LSCP in a large series of consecutive patients.

Methods

This was a single-center, retrospective study including all patients who underwent LSCP between 2003 and 2013. Data regarding pelvic organ prolapse (POP), surgical modalities and perioperative complications were collected. Patients were then contacted by telephone or postal letter in 2014. The main outcome criteria were grade III Dindo classification complications: reoperation for POP recurrence, mesh complications, and urinary incontinence (UI).

Results

Between January 2003 and December 2013, a total of 464 consecutive patients (mean age, 59 years) underwent LSCP. Almost all (99.1 %) patients presented with POP ≥ grade 3 (POP-Q classification). Long-term evaluations were completed for 391 (84.1 %) patients. The median follow-up was 53.5?±?28.2 months. The global reoperation rate was 12.5 %. The main reoperation indications were UI-related surgery in 21 patients (5.5 %), POP recurrence surgery in 20 patients (5.1 %), and mesh-related surgery in 11 patients (2.8 %). Multivariate analysis showed that older age at the time of initial surgery and concomitant subtotal hysterectomy were significant protective factors against global reoperation (HR?=?0.606, CI 95 % [0.451–0.815] and 0.367, CI 95 % [0.193–0.698] respectively) and reduced the risk of POP recurrence surgery.

Conclusion

Prolapse recurrence and mesh-related surgery occurred in 5.1 and 2.8 % of patients respectively, 4 years after laparoscopic sacrocolpopexy. Age and concomitant subtotal hysterectomy could play a role in the incidence of long-term reoperation.

     

Does fibrin glue sealant decrease the rate of pancreatic fistula after pancreaticoduodenectomy? results of a prospective randomized trial

Despite substantial improvements in perioperative mortality, complications, and specifically the development of a pancreatic fistula, remain a common occurrence after pancreaticoduodenectomy. It was the objective of this study to evaluate the role of fibrin glue sealant as an adjunct to decrease the rate of pancreatic fistula after pancreaticoduodenectomy. One hundred twenty-five patients were randomized after pancreaticoduodenal resection only if, in the opinion of the surgeon, the pancreaticojejunal anastomosis was at high risk for development of a pancreatic anastomotic leak. After completion of the pancreaticojejunal anastomosis, the patients were randomized to topical application of fibrin glue sealant to the surface of the anastomosis or no such application. The primary postoperative end points in this study were pancreatic fistula, total complications, death, and length of hospital stay. A total of 59 patients were randomized to the fibrin glue arm, whereas 66 patients were randomized to the control arm and did not receive fibrin glue application. The pancreatic fistula rate in the fibrin glue arm of the study was 26% vs. 30% in the control group (p = not significant [NS]). The mean length of postoperative stay for all patients randomized was similar (fibrin glue = 12.2 days, control = 13.6 days) and the mean length of stay for patients in whom pancreatic fistula developed was also not different (fibrin glue = 18.9 days, control = 21.7 days). There were no differences with respect to total complications or specific complications such as postoperative bleeding, infection, or delayed gastric emptying. These data demonstrate that the topical application of fibrin glue sealant to the surface of the pancreatic anastomosis in this patient population undergoing high-risk pancreaticojejunal anastomosis did not reduce the incidence of pancreatic fistula or total complications after pancreaticodudodenectomy. There seems to be no benefit regarding the use of this substance in this setting. Presented at the Forty-Fifth Annual Meeting of the Society for Surgery of the Alimentary Tract, New Orleans, Louisiana, May 15–19, 2004 (oral presentation). This work was supported in part by the Haemacure Company and Baxter Health Care.     

TEP under general anesthesia is superior to Lichtenstein under local anesthesia in terms of pain 6 weeks after surgery: results from a randomized clinical trial

Background

Persistent pain is common after inguinal hernia repair. The methods of surgery and anesthesia influence the risk. Local anesthesia and laparoscopic procedures reduce the risk for postoperative pain in different time perspectives. The aim of this study was to compare open Lichtenstein repair under local anesthesia (LLA) with laparoscopic total extraperitoneal repair (TEP) with respect to postoperative pain.

Methods

Between 2006 and 2010, a total of 389 men with a unilateral primary groin hernia were randomized, in an open-label study, to either TEP (n = 194) or LLA (n = 195). One patient in the TEP group and four in the LLA group were excluded due to protocol violation. Details about the procedure and patient and hernia characteristics were registered. Patients completed the Inguinal Pain Questionnaire (IPQ) 6 weeks after surgery. [The study is registered in ClinicalTrials.gov (No. NCT01020058)].

Results

A total of 378 (98.4 %) patients completed the IPQ. One hundred forty-eight patients (39.1 %) reported some degree of pain, 22 of whom had pain that affected concentration during daily activities. Men in the TEP group had less risk for pain affecting daily activities (6/191 vs. 16/187; odds ratio [OR] 0.35; 95 % CI 0.13–0.91; p = 0.025). Pain prevented participation in sporting activities less frequently after TEP (4.2 vs. 15.5 %; OR 0.24; 95 % CI 0.09–0.56; p < 0.001). Twenty-nine patients (7.7 %) reported sick leave exceeding 1 week due to groin pain, with no difference between the treatment groups.

Conclusions

Patients who underwent the laparoscopic TEP procedure suffered less pain 6 weeks after inguinal hernia repair than those who underwent LLA. Groin pain affected the LLA patients’ ability to perform strenuous activities such as sports more than TEP patients.     

Bupivacaine use in the Insuflow® device during laparoscopic cholecystectomy: results of a prospective randomized double-blind controlled trial

Background

Recent evidence [Surg Endosc (2007) 21: 602–606] demonstrates that intraperitoneal bupivacaine administered as an aerosol via a special catheter is safe and significantly decreases postoperative pain in laparoscopic surgery. We currently use the Insuflow^® device (Lexion Medical) routinely to warm and humidify gas in laparoscopic surgery. The purpose of this study is to determine whether using bupivacaine instead of water in existing technology already in use (Insuflow) will result in decreased postoperative pain, without increasing operative time or cost.

Methods

Using a double-blind methodology, 50 patients undergoing elective outpatient laparoscopic cholecystectomy were randomized to a study drug: either 10 ml of 0.5% bupivacaine (50 mg) or 10 ml of sterile water. The study drug was injected into the Insuflow in the standard fashion and the operation commenced routinely. No perioperative nonsteroidal anti-inflammatory drugs were used. Using a standard 0–10 pain-scoring scale, patients were assessed by perioperative nurses at 1 and 2 h postoperatively. Pain was again assessed at 24 h by telephone interview, along with the number of narcotic oral analgesics used in the first 24 h.

Results

Fifty patients were randomized, 25 in each group; the groups were comparable. All patients completed the study and 100% follow-up was obtained. All patients were discharged the same day and there were no significant complications in either group, and specifically no complications attributed to bupivacaine or use of the Insuflow device. There were no differences in pain at 1 and 2 h. There was less pain in the bupivacaine group at 24 h, but this was not statistically significant (P = 0.055).

Conclusions

Bupivacaine use in the Insuflow device is safe. No significant differences in postoperative pain were noted in this study compared to using water.     

Transobturator TVT-O versus retropubic TVT: results of a multicenter randomized controlled trial at 24 months follow-up

Introduction and hypothesis  

The purpose of this study is to compare the retropubic tension-free vaginal tape (TVT) procedure with the inside-out transobturator approach (TVT-O).     

Effects of PTH(1–84) therapy on muscle function and quality of life in hypoparathyroidism: results from a randomized controlled trial

Summary

The effects of treatment with 100 μg parathyroid hormone (PTH) (1–84) or an identical placebo on muscle function and quality of life (QoL) was studied in hypoparathyroid patients. At baseline, we found reduced QoL but no myopathy in the patients. Six months of treatment did not improve QoL, and muscle strength decreased slightly.

Introduction

A reduced quality of life (QoL) and myopathy that may be due to the absence of PTH have been reported in patients with hypoparathyroidism (hypoPT).

Methods

Sixty-two patients with chronic hypoPT were randomized to 6 months of treatment with either PTH(1–84) 100 μg/d s.c. or placebo, given as add-on therapy to conventional treatment. Muscle function and postural stability were investigated using a dynamometer chair, a stadiometer platform, the repeated chair stands test, the timed up and go test, and electromyography. QoL was assessed using the 36-item Short Form Health Survey and the WHO-5 Well-Being Index.

Results

The mean age of the patients was 52?±?11 years, and 85 % were females. At baseline, QoL was significantly reduced in comparison with norm-based scores. Compared with placebo, PTH did not improve QoL or muscle function. Rather, max force production decreased significantly by 30 % at elbow flexion in the PTH group compared with the placebo group. Moreover, there was a nonsignificant trend for muscle strength to decrease in the upper extremities and on knee extension in response to PTH. Treatment did not affect postural stability. Electromyography showed a slight decrease in the duration of motor unit potentials in the PTH group, indicating a tendency toward myopathy, which, however was not symptomatic.

Conclusions

Overall, our data do not support an immediate beneficial effect of PTH replacement therapy on muscle function or QoL. A high frequency of hypercalcemia among our patients may have compromised the potential beneficial effects of reversing the state of PTH insufficiency.     

Long-term prognosis of nerve palsy after total hip arthroplasty: results of two-year-follow-ups and long-term results after a mean time of 8 years

Introduction

Nerve damage is a rare but serious complication after THA. There exist only little data about the outcome of these patients particularly regarding the long-term results later than 2 years postoperatively. Aim of this study is to answer the following questions: Is the recovery to be expected for light nerve lesions different from the severe ones? Is there a possibility of nerve recovery more than 2 years after THA? Is the potential of nerve recovery depending on the affected nerve?

Materials and methods

This study investigates 2,255 primary THA as well as revision surgeries performed from 1988 to 2003 relating to iatrogenic nerve lesion. We classified the nerve lesion according to the core muscle strength in severe (M0–M2) and light (M3–M4) nerve damage and differentiated between femoral, sciatic and superior gluteal nerve, according to the electromyography.

Results

We found 34 cases of iatrogenic nerve damage representing an incidence of 1.5 %. 17 of 34 (50 %) patients showed a complete recovery after 2 years. Out of the remaining 17 patients, six out of seven patients with a final examination after a median time of 93 months achieved further improvement. The different nerves showed no significant different potential of recovery.

Conclusions

In contrast to the literature, an improvement beyond the limit of 2 years is probable and independent of the nerve affected.