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  • Lindstedt Ingemansson, Sandra, et al. (författare)
  • Microvascular Blood Flow Changes in the Small Intestinal Wall During Conventional Negative Pressure Wound Therapy and Negative Pressure Wound Therapy Using a Protective Disc Over the Intestines in Laparostomy.
  • 2012
  • Ingår i: Annals of Surgery. - Lippincott Williams & Wilkins. - 1528-1140. ; 255, s. 171-175
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVES:: Blood flow changes in the intestines during conventional negative pressure wound therapy (NPWT), and NPWT using a protective disc over the intestines in laparostomy. BACKGROUND:: Higher closure rates of the open abdomen have been reported with NPWT compared with other kinds of wound management. However, the method has been associated with increased development of fistulae. We have compared the changes in blood flow in the intestinal wall using conventional NPWT and NWPT with a protective disc between the intestines and the vacuum source. METHODS:: Midline incisions were made in 10 pigs and either conventional NPWT or NPWT with a disc over the intestines was applied. The microvascular blood flow was measured in the intestinal wall before and after the application of topical negative pressures of -50, -70, and -120 mmHg, using laser Doppler velocimetry. RESULTS:: The blood flow was significantly decreased (by 24%) after the application of conventional NPWT at -50 mmHg, compared with a slight decrease (2%) after the application of NWPT with a protective disc (P < 0.05). The blood flow was significantly decreased (by 54%) after the application of conventional NPWT at -120 mmHg, compared with a slight decrease (17%) after application of NPWT using a protective disc (P < 0.001). CONCLUSIONS:: Inserting a disc between the intestines and the vacuum source in NPWT protects the intestines from ischemia. The decreased blood flow in the intestinal wall may induce ischemia, which could promote the development of intestinal fistulae.
  • Lindström, David, et al. (författare)
  • Effects of a perioperative smoking cessation intervention on postoperative complications: a randomized trial
  • 2008
  • Ingår i: Annals of Surgery. - Lippincott Williams & Wilkins. - 0003-4932. ; 248:5, s. 739-745
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: To determine whether an intervention with smoking cessation starting 4 weeks before general and orthopedic surgery would reduce the frequency of postoperative complications.Summary Background Data: Complications are a major concern after elective surgery and smokers have an increased risk. There is insufficient evidence concerning how the duration of preoperative smoking intervention affects postoperative complications.Methods: A randomized controlled trial, conducted between February 2004 and December 2006 at 4 university-affiliated hospitals in the Stockholm region, Sweden. The outcome assessment was blinded. The follow-up period for the primary outcome was 30 days. Eligibility criteria were active daily smokers, aged 18 to 79 years. Of the 238 patients assessed, 76 refused participating, and 117 men and women undergoing surgery for primary hernia repair, laparoscopic cholecystectomy, or a hip or knee prosthesis were enrolled.Intervention: Smoking cessation therapy with individual counseling and nicotine substitution started 4 weeks before surgery and continued 4 weeks postoperatively. The control group received standard care. The main outcome measure was frequency of any postoperative complication.Results: An intention-to-treat analysis showed that the overall complication rate in the control group was 41%, and in the intervention group, it was 21% (P = 0.03). Relative risk reduction for the primary outcome of any postoperative complication was 49% and number needed to treat was 5 (95% CI, 3–40). An analysis per protocol showed that abstainers had fewer complications (15%) than those who continued to smoke or only reduced smoking (35%), although this difference was not statistically significant.Conclusion: Perioperative smoking cessation seems to be an effective tool to reduce postoperative complications even if it is introduced as late as 4 weeks before surgery.
  • Maret-Ouda, John, et al. (författare)
  • Antireflux surgery and risk of esophageal adenocarcinoma : : a systematic review and meta-analysis
  • 2016
  • Ingår i: Annals of Surgery. - Stockholm : Karolinska Institutet, Dept of Molecular Medicine and Surgery. - 0003-4932. ; 7.
  • Tidskriftsartikel (refereegranskat)abstract
    • Objective: To investigate the preventive effect of antireflux surgery against esophageal adenocarcinoma (EAC), compared to medical treatment of gastroesophageal reflux disease (GERD) and to the background population. Background: GERD is causally associated with EAC. Effective symptomatic treatment can be achieved with medication and antireflux surgery, yet the possible preventive effect on EAC development remains unclear. Methods: This systematic review identified 10 studies comparing EAC risk following antireflux surgery with non-operated GERD patients, including 7 studies of patients with Barrett’s esophagus; and 2 studies comparing EAC risk after antireflux surgery to the background population. A fixed-effects Poisson meta-analysis was conducted to calculate pooled incidence rate ratios (IRR) and 95% confidence intervals (CI). Results: The pooled IRR in patients following antireflux surgery was 0.76 (95% CI 0.42-1.39) compared to medically treated GERD patients. In patients with Barrett’s esophagus, the corresponding IRR was 0.46 (95% CI 0.20-1.08), and 0.26 (95% CI 0.09-0.79) when restricted to publications after 2000. There was no difference in EAC risk between antireflux surgery and medical treatment in GERD patients without known Barrett’s esophagus (IRR 0.98, 95% CI 0.72-1.33). The EAC risk remained elevated in patients following antireflux surgery compared to the background population (IRR 10.78, 95% CI 8.48-13.71). While the clinical heterogeneity of the included studies was high, the statistical heterogeneity was low. Conclusions: Antireflux surgery may prevent EAC better than medical therapy in patients with Barrett’s esophagus. The EAC risk following antireflux surgery does not seem to revert to that of the background population.
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