Background: Ureteral injuries during colorectal surgery are a rare event, ranging in the literature from 0.28-7.6%. Debate surrounds the use of prophylactic lighted ureteral stents to help protect the ureter during laparoscopic surgery. It has been suggested that they help to identify injuries but do not prevent them. The authors look to challenge this.Methods: Over 66 months, every laparoscopic or colectomy involving ureteral stents was recorded. Researchers documented any injury to the ureter intraoperatively. The chart was also reviewed for the complications of urinary tract infection (UTI) and urinary retention post-operatively.Results: During the 66 months, 402 laparoscopic colon resections were done. There were no ureteral injuries.The lighted ureteral stent was identified during every case in the effort to prevent injury during dissection and resection. No catheter associated UTIs were identified, while 14 (3.5%) suffered from post-operative urinary retention. Conclusions:The authors of this study present a large series of colon resections with no intraoperative ureteral injuries. In addition, these catheters were not associated with any UTIs and a rate of urinary retention similar to that of the at large data. This series provides compelling data to use lighted ureteral stents during laparoscopic colon surgery.

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Summary: Use of negative-pressure therapy (NPT) is a well-established therapy for chronic, open, contaminated wounds, promoting formation of granulation tissue and healing. The application of NPT after primary closure (ie, incisional NPT) has also been shown to reduce surgical site infection and surgical site occurrence in high-risk procedures across multiple disciplines. Incisional NPT is believed to decrease edema and shear stress, promote angiogenesis and lymphatic drainage, and increase vascular flow and scar formation. Incisional NPT may be considered when there is a high risk of surgical site occurrence or surgical site infection, particularly in procedures with nonautologous implants, such as hernia mesh or other permanent prosthetics. Here we discuss the proposed physiologic mechanism as demonstrated in animal models and review clinical outcomes across multiple specialties.

Chloromethanes are a group of volatile organic compounds that are harmful to the environment and human health. Abundant studies have verified that hydrodechlorination might be an effective treatment to remove these chlorinated pollutants. The most outstanding advantages of this technique are the moderate operating conditions used and the possibility of obtaining less hazardous valuable products. This review presents a global analysis of experimental and theoretical studies regarding the hydrodechlorination of chloromethanes. The catalysts used and their synthesis methods are summarized. Their physicochemical properties are analyzed in order to deeply understand their influence on the catalytic performance. Moreover, the main causes of the catalyst deactivation are explained, and prevention and regeneration methods are suggested. The reaction systems used and the effect of the operating conditions on the catalytic activity are also analyzed. Besides, the mechanisms and kinetics of the process at the atomic level are reviewed. Finally, a new perspective for the upgrading of chloromethanes, via hydrodechlorination, to valuable hydrocarbons for industry, such as light olefins, is discussed.