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Dive into the research topics where W.G. van Gemert is active.

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Featured researches published by W.G. van Gemert.


Colorectal Disease | 2007

Sacral neuromodulation in patients with faecal incontinence: results of the first 100 permanent implantations.

J. Melenhorst; S. M. P. Koch; Ö. Uludağ; W.G. van Gemert; C. G. M. I. Baeten

Objective  Faecal incontinence (FI) is a socially devastating problem. Sacral nerve modulation (SNM) has proven its place in the treatment of patients with FI. In this study, the first 100 definitive SNM implants in a single centre have been evaluated prospectively.


Colorectal Disease | 2008

Is a morphologically intact anal sphincter necessary for success with sacral nerve modulation in patients with faecal incontinence

J. Melenhorst; S. M. P. Koch; Ö. Uludağ; W.G. van Gemert; C. G. M. I. Baeten

Objective  Sacral nerve modulation (SNM) for the treatment of faecal incontinence was originally performed in patients with an intact anal sphincter or after repair of a sphincter defect. There is evidence that SNM can be performed in patients with faecal incontinence and an anal sphincter defect.


Colorectal Disease | 2010

A prospective multicentre study to investigate percutaneous tibial nerve stimulation for the treatment of faecal incontinence

B. Govaert; D. Pares; S. Delgado-Aros; F. La Torre; W.G. van Gemert; C. G. M. I. Baeten

Aim  Percutaneous tibial nerve stimulation (PTNS) is a minimal invasive treatment that can be performed in the outpatient clinic. This is a pilot study to investigate PTNS in the treatment of faecal incontinence.


Colorectal Disease | 2005

Staged mucosal advancement flap for the treatment of complex anal fistulas: pretreatment with noncutting Setons and in case of recurrent multiple abscesses a diverting stoma

S.J. van der Hagen; C. G. M. I. Baeten; P.B. Soeters; Regina G. H. Beets-Tan; M. G. V. M. Russel; W.G. van Gemert

Objective  To assess the efficacy of a staged strategy for the treatment of complex perianal fistula.


British Journal of Surgery | 2005

Determination of therapeutic threshold in sacral nerve modulation for faecal incontinence

S. M. P. Koch; W.G. van Gemert; C. G. M. I. Baeten

The aim of the study was to determine the therapeutic stimulation threshold in patients with successful sacral nerve modulation for faecal incontinence.


Digestive Surgery | 2005

First Results after Introduction of the Four-Armed da Vinci Surgical System in Fully Robotic Laparoscopic Cholecystectomy

J.W.M. Heemskerk; R.M. van Dam; W.G. van Gemert; Geerard L. Beets; Jan Willem M. Greve; M.J. Jacobs; Nicole D. Bouvy

Background: Laparoscopic cholecystectomy offers less post-operative pain, less complications, and faster recovery compared with open cholecystectomy. However, laparoscopic surgery can be demanding because of several technical drawbacks. Robotic surgery allows dexterity skills to be performed faster and shortens the learning curve, possibly leading to faster and safer laparoscopic surgery. Methods: In this paper, we report the results of our first 12 cases of fully robotic laparoscopic cholecystectomy using the da Vinci Surgical System, comparing them with 12 cases of conventional laparoscopic cholecystectomy. Using a fourth arm in robotic laparoscopy enables the surgeon to perform surgery without the use of a tableside assistant, leading to non-tiring, tremble-free assistance and reducing salary costs. Primary end points are operating time and costs. Secondary end points are operative complications and duration of admission. Results: Fully robotic cholecystectomy was completed in all 12 cases without increased complication rate and without conversions. However, robotic assistance results in an increased overall operating room stay of 31 min and increased costs of EUR 1,180.62. Conclusion: Fully robotic laparoscopic cholecystectomy is safe and feasible but seems more expensive and time consuming at this moment.


Diseases of The Colon & Rectum | 2009

Factors associated with percutaneous nerve evaluation and permanent sacral nerve modulation outcome in patients with fecal incontinence

B. Govaert; J. Melenhorst; Fred Nieman; Esther Bols; W.G. van Gemert; C. G. M. I. Baeten

PURPOSE: Sacral nerve modulation is an established treatment for fecal incontinence. Little is known about predictive factors for successful percutaneous nerve evaluation (or test stimulation) and permanent sacral nerve modulation outcome. The purpose of this retrospective study was to discover predictive factors associated with temporary and permanent stimulation. METHODS: We analyzed data from test stimulations performed in patients with fecal incontinence from March 2000 until May 2007. Successful outcome was defined as >50% improvement of incontinence episodes in three weeks. Patients with a successful test stimulation were eligible for permanent sacral nerve modulation implantation. All patients who subsequently had permanent sacral nerve modulation were analyzed. Logistic regression was used to determine the predictive power of baseline demographics and diagnostic variables. RESULTS: Test stimulations were performed in 245 patients (226 females; mean age, 56.6 (standard deviation, 12.8) years). Our analysis showed that older age (P = 0.014), external anal sphincter defects (P = 0.005), and repeated procedures after initial failure (P = 0.001) were significantly related to failure. One hundred seventy-three patients (70.6%) were eligible for permanent sacral nerve modulation implantation. The analysis showed no significant predictive factors related to permanent sacral nerve modulation. CONCLUSION: Three predictive factors were negatively associated with the outcome of test stimulation: older age, repeated procedures, and a defect in the external anal sphincter. These factors may indicate lower chances of success for test stimulation but do not exclude patients from sacral nerve modulation treatment. Although assessed in a selected patient group, no factors were predictive of the outcome of permanent stimulation.


British Journal of Surgery | 2008

Prospective study of colonic irrigation for the treatment of defaecation disorders.

S. M. P. Koch; J. Melenhorst; W.G. van Gemert; C. G. M. I. Baeten

Retrograde colonic irrigation is a possible treatment for defaecation disorders when conservative treatment or surgery has failed. The aim of this prospective study was to investigate its effectiveness.


Colorectal Disease | 2011

Sacral neuromodulation: long term outcome and quality of life in patients with faecal incontinence

Ö. Uludağ; J. Melenhorst; S. M. P. Koch; W.G. van Gemert; Cornelis H.C. Dejong; C. G. M. I. Baeten

Aim  Since 1994 sacral neuromodulation (SNM) has increasingly been used for the treatment of faecal incontinence, but no long‐term data in a large group of patients have so far been published. We report long‐term outcome and quality of life in the first 50 patients treated by permanent SNM for faecal incontinence.


International Journal of Colorectal Disease | 2009

Retrograde colonic irrigation for faecal incontinence after low anterior resection

S. M. P. Koch; M.P. Rietveld; B. Govaert; W.G. van Gemert; C. G. M. I. Baeten

Background and aimsThis study aims to evaluate the therapeutic effect of retrograde colonic irrigation in patients with faecal incontinence after a low anterior resection for a rectal carcinoma.Materials and MethodsPatients with a previous low anterior resection, who were selected for treatment with retrograde colonic irrigation for faecal incontinence between 2005 and 2008, were included in the study. The data from the patients were gathered by chart research and an interview by phone.ResultsThirty patients were included in the study. Three patients died and one patient was not able to answer questions due to a cognitive disorder. The data of the remaining 26 patients were analysed. Five patients had already stopped with the retrograde colonic irrigation treatment due to side effects. Twelve of the 21 patients (57.46%) who still performed RCI became completely (pseudo)continent, three patients (14.2%) were incontinent for flatus and six patients (29.4%) were still incontinent for liquid stool. Five patients stopped with the retrograde colonic irrigation treatment due to side-effects.ConclusionRetrograde colonic irrigation is an effective method to treat patients with faecal incontinence after a low anterior resection for rectal carcinoma. Retrograde colonic irrigation is not invasive and has only mild side effects.

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S. M. P. Koch

Maastricht University Medical Centre

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Ruben G.J. Visschers

Maastricht University Medical Centre

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Ö. Uludağ

Maastricht University Medical Centre

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