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L W Janssen

Publications and source records attributed to L W Janssen.

8 recordsLinked to original sources
PubMed1999

Abdominal rectovaginopexy: modified technique to treat constipation.

PURPOSE: We noted the combination of obstructed defecation or constipation and fecal incontinence, the poor results of abdominal rectopexy for constipation, and the well-known risk of postoperative induction of constipation after rectopexy. We developed a new operation to treat patients with constipation or fecal incontinence (with a concomitant rectocele, internal rectal intussusception, enterocele at dynamic defecography, or all three) or both. This new rectopexy technique avoided dorsolateral mobilization of the rectum and did not endanger the hypogastric nerves and pelvic autonomic nerves. A better effect on constipation compared with rectopexies with dorsolateral mobilization was expected. METHODS: The results of this new operation, which was called rectovaginopexy, were studied prospectively in a series of 27 patients. Four-year results were obtained. Preoperative and postoperative questionnaires, dynamic defecograms, and anorectal physiology studies were analyzed. RESULTS: Before the operation 17 patients were constipated, compared with 4 patients one year after rectovaginopexy (76 percent improvement; P = 0.0015) and 5 patients four years after rectovaginopexy (71 percent improvement: P = 0.005), respectively. At one year, fecal incontinence decreased significantly: 15 of 17 patients improved and 9 patients became fully continent (P = 0.0007). Four years after rectovaginopexy the effect on fecal incontinence was no longer significant (P = 0.09). Rectovaginopexy restored anatomy: all (9) enteroceles, all but 1 (17) internal rectal intussusception, and 12 of 20 rectoceles dissolved, and the majority were reduced in size. Rectal sensation for distention was unchanged, and rectal electrosensitivity improved (P = 0.04). CONCLUSIONS: Rectovaginopexy provides significant one-year improvement of both constipation and fecal incontinence. The positive effect on constipation did not deteriorate with time, in contrast to the effect on fecal incontinence.

Adult↗
PubMed1998

Novel approach to combined defaecation and micturition disorders with rectovaginovesicopexy.

BACKGROUND: This study was conducted to investigate the results of rectovaginovesicopexy (RVVP) in patients with combined defaecation and micturition disorders. RVVP was developed from a standard procedure for different forms of defaecation disorders (the rectovaginopexy (RVP)). It is only a limited extension to the RVP and results in elevation of all three pelvic compartments. METHODS: In a consecutive series of 25 patients the effects or RVVP were evaluated prospectively. Information about the clinical history and results was obtained by a standard questionnaire filled out before and 3 and 12 months after operation. Dynamic defaecography was performed before and 3 months after RVVP. Before operation urodynamic studies were conducted. RESULTS: RVVP improved constipation (14 of 18 patients improved, P = 0.001), faecal incontinence (11 of 16 patients improved, P = 0.005) and dysfunctional voiding (ten of 16 patients improved, P = 0.07) without induction of these disorders. Overall urinary incontinence improved in 11 of 22 patients (P = 0.18), with deterioration of urinary incontinence in three and induction of urinary incontinence in two of the patients. Patients with isolated urinary stress incontinence fared better (eight of 13 patients improved) than those with mixed urinary incontinence. CONCLUSION: RVVP provides satisfactory improvement of combined defaecation and micturition disorders. The benefits of a limited extension of the RVP seem to outweigh potential side-effects such as deterioration or de novo defaecation or micturition disorders.

Adult↗
PubMed1994

[Consensus hemorrhoids (Dutch Society for Surgery)].

On the initiative of the Dutch Surgical Society a consensus meeting was held on December 3rd, 1993 in Utrecht, the Netherlands by the National Organisation for Quality Assurance in Hospitals (CBO), on the diagnosis and treatment of haemorrhoids. The following statements were formulated. Haemorrhoids are vascular cushions, covered by mucosa, originating from the plexus rectalis superior, and are part of the normal anatomy of man. Complaints from haemorrhoids occur if they prolapse. The usual 4-grade classification of haemorrhoids has no direct impact on their treatment. Portal hypertension is not a cause of haemorrhoids. Blood loss, a sensation of prolapse, pruritus and soiling are non-specific symptoms of haemorrhoids. Anaemia may only be attributed to haemorrhoids after other pathology has been excluded. Acute massive anorectal blood loss is frequently caused by traumatic damage to the rectum. Anticoagulant therapy is a risk factor. The presence of unexplained perianal skin lesions neccessitates further proctologic investigation. Haemorrhoids are not palpable on rectal digital examination. In patients under 50 with anorectal blood loss and a history of haemorrhoids, a proctoscopic examination is sufficient. Anorectal blood loss in patients over 50 requires exclusion of higher pathology. The regulation of defaecation and eating habits can have a preventive effect on the development of haemorrhoids. Conservative measures form the basis of treatment for haemorrhoidal complaints. Local antihaemorrhoidal treatment can only be expected to give short-term relief and is not a causal therapy. Barron elastic band ligation and sclerosing, in addition to infrared coagulation are treatment modalities in the outpatient setting that are very effective, inexpensive and optimally patient-friendly.(ABSTRACT TRUNCATED AT 250 WORDS)

Hemorrhoids↗
PubMed1994

Selection criteria for anterior rectal wall repair in symptomatic rectocele and anterior rectal wall prolapse.

PURPOSE: This study was undertaken to determine the outcome and changes produced by an endorectal anterior wall repair in objective functional parameters using anorectal manometry and defecography and to asses their usefulness in the selection of patients for the operation. METHODS: Between 1986 and 1990, we performed a prospective study of 76 consecutive patients with symptomatic rectocele and/or an anterior rectal wall prolapse. All patients were studied prospectively according to a fixed protocol. Standard questionnaire, defecation diary, clinical examination, defecography, and anal manometry were performed preoperatively and three to four months postoperatively. RESULTS: Three months postoperatively, 38 patients (50 percent) had no complaints at all (excellent result), 32 (42 percent) had only a minor complaint (good result), and in 6 patients (8 percent) the complaints were essentially unchanged (unsatisfactory result). After one year, similar figures were obtained. The postoperative mean stool frequency in all patients after three months was significantly increased (P < 0.05) but not after one year. Postoperative defecographies showed a complete absence or significant diminution of the rectocele at three months and were significantly correlated with relief of symptoms. An inverse correlation was found between improvement in incontinence grade after operation and (larger) preoperative volume at which urge to defecate was elicited, making it a good predictor of improvement in incontinence by the operation. CONCLUSIONS: The anterior rectal wall repair positively influences rectal sensation in patients with incontinence and/or obstructed defecation caused by a rectocele and/or an anterior rectal wall prolapse. Anorectal manometry was useful in studying the beneficial physiologic effects of the endorectal repair. In patients with no previous pelvic surgery, a large urge to defecate volume is a good predictor of a good clinical outcome.

Adult↗
PubMed1986

Electrical stimulation of bone growth with direct current.

Electrical stimulation of osteogenesis was studied in rabbit femora in: (A) a transcortical electric field with a cortex-depolarizing or hyperpolarizing orientation derived from an intramedullary electrode and a ring-shaped counter electrode encircling the femoral shaft; and (B) an electric field derived from an electrode located in the medullary canal and the counter electrode in the abdominal wall. Electrodes were made of platinum. A direct current of 20 microA was applied during six weeks. Contralateral femora with dummy electrodes served as controls. Results were analyzed by optical densitometry of roentgenograms and histomorphometry of histologic slides. Under the conditions of these experiments bone growth was not stimulated by applying a cortex-depolarizing electric field. Significant stimulation of bone growth was only observed at an intramedullary cathode, when the anode was placed at a distance.

Animals↗
PubMed1983

Electrode-oxygen consumption and its effects on tissue-oxygen tension. A study by mass spectrometry.

A theory for the mechanism of electrical bone stimulation proposes that passage of an electric current reduces the local PO2 and raises the pH near the cathode, thereby creating a favorable environment for osteogenesis. To study the effects of electric current passage on the PO2, PCO2 and pH in the vicinity of the electrodes in vivo, a wire electrode spiralled around the catheter of a clinical mass spectrometer was placed in dog muscle. Electrodes were made of stainless steel or platinum. With a cathode located in the tissue, a 20-microA direct constant current caused a drop in PO2 of 5-10 mmHg and a drop in PCO2 of 2-6 mmHg, both reaching plateaus again within five to 20 minutes. The time required to reach this new equilibrium was shorter for platinum than for stainless steel. When the electric current was turned off, PO2 and PCO2 reversed to their original values. Because of the high buffer capacity of tissue, it is highly unlikely that 20-microA current would induce a change in pH.

Animals↗