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Biomedical subjects

Anders Mellgren

Publications and source records attributed to Anders Mellgren.

13 recordsLinked to original sources
PubMed2006

Long-term effect of preoperative radiation therapy on anorectal function.

PURPOSE: Preoperative radiotherapy improves local control in rectal cancer treatment, but there are few reports on the influence of radiotherapy on anorectal function. The aim of the present study was to assess late effects of short-course, high-dose radiotherapy on anorectal function after low anterior resection for rectal cancer. METHODS: Sixty-four patients, randomized within the Stockholm Radiotherapy Trials and operated on with low anterior resection with or without preoperative radiotherapy (mean, 14 years), previously were followed up with quality-of-life questionnaires, clinical examination, anorectal manometry, and endoanal ultrasound. Twenty-one patients had received preoperative radiotherapy of the rectum and 43 patients had been treated with surgery alone. RESULTS: Impaired anorectal function was common after low anterior resection for rectal cancer and the risk was increased after radiotherapy. Irradiated patients had significantly more symptoms of fecal incontinence (57 vs. 26 percent, P = 0.01), soiling (38 vs. 16 percent, P = 0.04), and significantly more bowel movements per week (20 vs. 10, P = 0.02). At anorectal manometry, irradiated patients had significantly lower resting (35 mmHg vs. 62 mmHg, P < 0,001) and squeeze pressures (104 mmHg vs. 143 mmHg, P = 0.05). At endoanal ultrasound, irradiated patients had significantly more scarring of the anal sphincters (33 vs. 13 percent, P = 0.03). There were no significant differences in quality-of-life scores between irradiated and nonirradiated patients; however, patients with anal incontinence had significantly lower quality-of-life scores compared to continent patients. CONCLUSIONS: Short-course radiotherapy, including the anal sphincters, impairs anorectal function and increases gastrointestinal symptoms permanently when the anal sphincters are irradiated.

Aged↗
PubMed2006

A three-year prospective assessment of rectocele repair using porcine xenograft.

OBJECTIVE: To prospectively evaluate clinical outcome of rectocele repair using xenograft 3 years after surgery. METHODS: Twenty-three patients who completed evaluation preoperatively and 1 year after surgery were assessed at a 3-year follow-up. Clinical examination was performed preoperatively, and at the 1- and 3-year follow-ups, with the pelvic organ prolapse quantification system. Symptom assessment was performed with a validated bowel function questionnaire including questions on sexual function. RESULTS: There were no graft-related complications during the 3 years following surgery. Preoperatively, all patients had stage II prolapse of the posterior vaginal wall and a rectocele verified at defecography. At the 1-year follow-up, 11 of 29 patients (38%) had rectocele of stage II or more, and 4 patients were reoperated. At 3-year follow-up 7 of 23 patients (30%) had rectocele of stage II or more. When including the 4 early anatomical recurrences, a total of 11 of 27 patients (41%) had rectocele of stage II or more at 3-year follow-up. Preoperatively, all patients reported varying degrees of rectal emptying difficulties and symptoms of bowel dysfunction. There was a significant decrease in rectal emptying difficulties (P < .01), sense of incomplete evacuation (P < .01), need for manually assisted defecation (P < .05), and symptoms of pelvic heaviness (P < .001) at the 3-year follow-up compared with preoperatively. Cure of rectal emptying difficulties was reported by fewer than 50% of patients. There were no significant changes in anal incontinence scores or symptoms of sexual dysfunction at the 3-year follow-up compared with preoperatively. CONCLUSION: Rectocele repair using porcine dermal graft was associated with an unsatisfactory anatomical cure rate and persistent bowel-emptying difficulties in the majority of patients 3 years postoperatively. LEVEL OF EVIDENCE: II-3.

Adult↗
PubMed2005

Functional and anatomic outcome after transvaginal rectocele repair using collagen mesh: a prospective study.

PURPOSE: This study was designed to evaluate rectocele repair using collagen mesh. METHODS: 32 female patients underwent surgical repair using collagen mesh. Outcome was assessed in 29 patients and preoperative assessment included standardized questionnaire, clinical examination, and defecography. At the six-month follow-up, patients answered a standardized questionnaire and underwent clinical examination. At the 12-month follow-up, patients answered a standardized questionnaire, underwent clinical examination, and defecography. RESULTS: Preoperatively, 26 patients had a Stage II and 3 patients had a Stage III rectocele. At the 6-month follow-up, five patients had rectocele > or = Stage II (P < 0.001) and at the 12-month follow-up, seven patients had rectocele > or = Stage II (P < 0.001) at clinical examination. At the preoperative defecography, all patients presented a rectocele. At the 12-month defecography, 14 patients had no rectocele (P < 0.001) and 15 had a rectocele. At the six-month follow-up, there was a significant decrease in rectal emptying difficulties, need of digital support of the posterior vaginal wall at defecation, and defecation frequency. At the 12-month follow-up, symptom improvement remained, but was less pronounced. CONCLUSIONS: Rectocele repair using collagen mesh improved anatomic support, but there is a substantial risk for recurrence with unsatisfactory anatomic and functional outcome one year after surgery. Rectocele repair using mesh was not associated with an increased risk of dyspareunia. Rectocele repair using biomaterial mesh reinforcement needs further evaluation before adopted into clinical practice.

Adult↗
PubMed2005

Rectocele repair using biomaterial augmentation: current documentation and clinical experience.

UNLABELLED: Although the etiology of rectocele remains debated, surgical innovations are currently promoted to improve anatomic outcome while avoiding dyspareunia and alleviating rectal emptying difficulties following rectocele surgery. Use of biomaterials in rectocele repair has become widespread in a short time, but the clinical documentation of their effectiveness and complications is limited. Medline and the Cochrane database were searched electronically from 1964 to May 2005 using the Pubmed and Ovid search engines. All English language publications including any of the search terms "rectocele," "implant," "mesh," "biomaterial," "prolapse," "synthetical," "pelvic floor," "biological," and "compatibility" were reviewed. This review outlines the basic principles for use of biomaterials in pelvic reconstructive surgery and provides a condensation of peer-reviewed articles describing clinical use of biomaterials in rectocele surgery. Historical and new concepts in rectocele surgery are discussed. Factors of importance for human in vivo biomaterial compatibility are presented together with current knowledge from clinical studies. Potential risks and problems associated with the use of biomaterials in rectocele and pelvic reconstructive surgery in general are described. Although use of biomaterials in rectocele and other pelvic organ prolapse surgery offers exciting possibilities, it raises treatment costs and may be associated with unknown and potentially severe complications at short and long term. Clinical benefits are currently unknown and need to be proven in clinical studies. TARGET AUDIENCE: Obstetricians & Gynecologists, Family Physicians TARGET AUDIENCE: After completion of this article, the reader should be able to explain that the objective of surgical treatment is to improve anatomic outcome and alleviate rectal emptying difficulties, describe the efficacy of biomaterials in rectocele repair, and summarize the potential risks and problems associated with use of biomaterials in rectocele and pelvic reconstructive surgery.

Biocompatible Materials↗
PubMed2004

Assessment of posterior vaginal wall prolapse: comparison of physical findings to cystodefecoperitoneography.

The aim of the present study was to compare clinical and radiological findings when assessing posterior vaginal wall prolapse. Defecography can be used to complement the clinical evaluation in patients with posterior vaginal wall prolapse. Further development of the defecography technique, using contrast medium in the urinary bladder and intraperitoneally, have resulted in cystodefecoperitoneography (CDP). Thirty-eight women underwent clinical examination using the pelvic organ prolapse quantification system (POP-Q) followed by CDP. All patients answered a standardized bowel function questionnaire. Statistical analysis measuring correlation between POP-Q and CDP using Pearson's correlation coefficient (r) and Spearman's rank order correlation coefficient (rs) demonstrated a poor to moderate correlation, r=0.49 and rs=0.55. Although there was a strong association between large rectoceles (>3 cm) at CDP and symptoms of rectal emptying difficulties (p<0.001), severity and prevalence of bowel dysfunction showed poor coherence with clinical prolapse staging and findings at radiological imaging. Vaginal topography and POP-Q staging predict neither radiological size nor visceral involvement in posterior vaginal wall prolapse. Radiological evaluation may therefore be a useful complement in selected patients.

Adult↗
PubMed2004

Sacral spinal nerve stimulation for faecal incontinence: multicentre study.

BACKGROUND: In patients with faecal incontinence in whom conservative treatment fails, options are limited for those with a functionally deficient but morphologically intact sphincter. We investigated the effect of sacral nerve stimulation on continence and quality of life. METHODS: In this multicentre prospective trial, 37 patients underwent a test stimulation period, followed by implantation of a neurostimulator for chronic stimulation in 34. Effect on continence was assessed by daily bowel-habit diaries over a 3-week period and on quality of life by the disease-specific American Society of Colon and Rectal Surgeons (ASCRS) questionnaire and the standard short form health survey questionnaire (SF-36). Every patient served as his or her own control. FINDINGS: Frequency of incontinent episodes per week fell (mean 16.4 vs 3.1 and 2.0 at 12 and 24 months; p<0.0001) for both urge and passive incontinence during median follow-up of 23.9 months. Mean number of days per week with incontinent episodes also declined (4.5 vs 1.4 and 1.2 at 12 and 24 months, p<0.0001), as did staining (5.6 vs 2.4 at 12 months; p<0.0001) and pad use (5.9 vs 3.7 at 12 months; p<0.0001). Ability to postpone defecation was enhanced (at 12 months, p<0.0001), and ability to completely empty the bowel was slightly raised during follow-up (at 12 months, p=0.4122). Quality of life improved in all four ASCRS scales (p<0.0001) and in seven of eight SF-36 scales, though only social functioning was significantly improved (p=0.0002). INTERPRETATION: Sacral nerve stimulation greatly improves continence and quality of life in selected patients with morphologically intact or repaired sphincter complex offering a treatment for patients in whom treatment options are limited.

Adult↗
PubMed2004

Effect of hysterectomy on bowel function.

PURPOSE: Hysterectomy is the most common major gynecologic procedure. Unwanted postoperative effects on bowel function are a topic of recent debate. The aim of the present study was to prospectively evaluate the influence of hysterectomy on bowel function. METHODS: One hundred and twenty consecutive patients undergoing hysterectomy for benign conditions answered a questionnaire covering bowel habits and symptoms preoperatively and at 6 and 12 months postoperatively. Forty-four patients underwent vaginal hysterectomy and 76 underwent abdominal hysterectomy. Concomitant bilateral salpingo-oopherectomy was performed in 17 patients. RESULTS: After abdominal hysterectomy, patients reported increased symptoms of gas incontinence, urge to defecate, and inability to distinguish between gas and feces ( P < 0.05). There was a tendency of increased fecal incontinence. Subgroup analysis indicated that concomitant bilateral salpingo-oopherectomy resulted in an increased risk of fecal incontinence. No significant changes were detected in symptoms associated with constipation. Mean defecation frequency increased and the frequency of pelvic heaviness symptoms was reduced. After vaginal hysterectomy, there was no increased frequency of incontinence or constipation symptoms. The frequency of pelvic heaviness symptoms was reduced. CONCLUSIONS: Patients undergoing abdominal hysterectomy may run an increased risk for developing mild to moderate anal incontinence postoperatively and this risk is increased by simultaneous bilateral salpingo-oopherectomy. An increased risk of anal incontience symptoms could not be identified in patients undergoing vaginal hysterectomy. Our study does not support the assumption that hysterectomy is associated with de novo or deteriorating constipation.

Abdomen↗
PubMed2004

Clinical and histological safety assessment of rectocele repair using collagen mesh.

AIM: To clinically and histologically evaluate inflammatory response following rectocele repair using porcine collagen mesh. METHODS: Seventeen patients underwent rectocele repair using porcine collagen mesh. Inflammatory response was assessed by clinical and histological inflammatory grading pre- and postoperatively. Postoperative body temperature, complications and hospital stay was compared with 15 patients undergoing posterior colporraphy. RESULTS: Postoperative clinical examination did not demonstrate any inflammatory reaction. There were no significant changes in fibroblast count (P = 0.43), connective tissue density grading (P = 0.54), macrophage count (P = 0.20), inflammatory cell count (P = 0.48), total cell count (P = 0.51), or inflammatory grading (P = 0.87) postoperatively compared with preoperative values. Body temperature was significantly elevated for both the study and control group, although higher for the study group, postoperatively day 1 (P < 0.001). There were no significant differences in hospital stay and postoperative complications. CONCLUSION: Porcine collagen mesh was not associated with an adverse inflammatory response at clinical or histological evaluation and appears to be a safe material when used for rectocele repair.

Adult↗
PubMed2003

Diagnosis of cystocele--the correlation between clinical and radiological evaluation.

In patients with genital prolapse involving several compartments simultaneously, radiologic investigation can be used to complement the clinical assessment. Contrast medium in the urinary bladder enables visualization of the bladder base at cystodefecoperitoneography (CDP). The aim of the present study was to evaluate the correlation between clinical examination using the Pelvic Organ Prolapse Quantification system (POP-Q) and CDP. Thirty-three women underwent clinical assessment and CDP. Statistical analysis using Pearson's correlation coefficient ( r) demonstrated a wide variability between the current definition of cystocele at CDP and POP-Q ( r=0.67). An attempt to provide an alternative definition of cystocele at CDP had a similar outcome ( r=0.63). The present study demonstrates a moderate correlation between clinical and radiologic findings in patients with anterior vaginal wall prolapse. It does not support the use of bladder contrast at radiologic investigation in the routine preoperative assessment of patients with genital prolapse.

Adult↗
PubMed2003

Obstetric sphincter tears and anal incontinence: an observational follow-up study.

BACKGROUND: Persistent defects after primary sphincter repair and occult sphincter tears are common after vaginal deliveries. Anal incontinence may be associated with these morphological defects. MATERIAL AND METHODS: Forty-six primiparous women were evaluated with ultrasonography, manometry and electrophysiology. Twenty-four women had undergone primary repair of obstetric sphincter tears (sphincter group), 16 women had no clinical sphincter tear but developed anal incontinence postpartum (symptom group), and six were delivered by elective cesarean section (cesarean group). RESULTS: In the sphincter group, 50% had anal incontinence at follow-up. At ultrasonography, 70% had injuries anteriorly in the midanal canal. At manometry, 4% had decreased resting pressure and 50% decreased squeeze pressure. At electrophysiology, 19% had pathologic pudendal latency and 25% pathologic fiber density. In the symptom group, 44% had injuries anteriorly in the midanal canal at ultrasonography. At manometry, all women had normal resting pressure and 19% had a decreased squeeze pressure. At electrophysiology, 46% had pathologic pudendal latency and 29% pathologic fiber density. In the cesarean group, 33% had mild anal incontinence at follow-up. Ultrasonography and manometry were normal in all women. At electrophysiology, 33% had pathologic pudendal latency and 17% pathologic fiber density. CONCLUSION: Anal sphincter injuries at childbirth are often inadequately diagnosed and primary repair frequently results in persisting defects in the anal sphincter. Anatomic injuries to the anal sphincter play an important role in the development of anal incontinence after delivery, but a significant proportion of symptomatic women also demonstrate neurologic impairment at electrophysiologic testing.

Adult↗
PubMed2002

Accuracy of endorectal ultrasonography in preoperative staging of rectal tumors.

PURPOSE: Preoperative staging of rectal tumors is considered essential to tailor treatment for individual patients. The aim of the present study was to evaluate the accuracy of endorectal ultrasonography in preoperative staging of rectal tumors. METHODS: Eleven hundred eighty-four patients with rectal adenocarcinoma or villous adenoma underwent endorectal ultrasonography evaluation at a single institution during a ten-year period. We compared the endorectal ultrasonography staging with the pathology findings based on the surgical specimens in 545 patients who had surgery (307 by transanal excision, 238 by radical proctectomy) without adjuvant preoperative chemoradiation. Comparisons between groups were performed using chi-squared tests and logistic regression analysis. RESULTS: Overall accuracy in assessing the level of rectal wall invasion was 69 percent, with 18 percent of the tumors overstaged and 13 percent understaged. Accuracy depended on the tumor stage and on the ultrasonographer. Overall accuracy in assessing nodal involvement in the 238 patients treated with radical surgery was 64 percent, with 25 percent overstaged and 11 percent understaged. CONCLUSION: The accuracy of endorectal ultrasonography in assessing the depth of tumor invasion, particularly for early cancers, is lower than previously reported. The technique is more precise in distinguishing between benign tumors and invasive cancers and between tumors localized to the rectal wall and tumors with transmural invasion. Differences in image interpretation may in part explain discrepancies in accuracy between studies.

Adenocarcinoma↗