Multi-Center Randomized Controlled Trial on the Effect of Triclosan-Coated Sutures on Surgical Site Infection after Colorectal Surgery

BACKGROUND

Surgical site infection (SSI) remains the most frequent complication after colorectal resection. The role of sutures coated with antimicrobial agents such as triclosan in reducing SSI is controversial.

METHODS

This was a multi-center randomized controlled trial with patients and outcome assessors blinded to treatment. The study was performed in four university referral hospitals. Patient candidates for elective colorectal resection were assigned randomly to abdominal incision closure with polyglactin 910 triclosan-coated sutures (triclosan group) or with polyglactin 910 without triclosan (control group). The primary outcome was the rate of SSI within 30 d after hospital discharge. The secondary outcomes were the overall rate of incision complications and length of hospital stay (LOS).

RESULTS

Two hundred eighty-one patients (triclosan group: 140; control group: 141) were analyzed after randomization. The rate of SSI was 12.9% (18/140) in the triclosan group versus 10.6% (15/141) in the control group (odds ratio: 1.24; 95% confidence interval: 0.60-2.57; p=0.564). Secondary outcome analysis showed an overall incision complication rate of 38.3% in the control group versus 45.7% in the triclosan group (odds ratio: 1.36; 95% confidence interval: 0.84-2.18; p=0.208). Median LOS was 11 d in both groups (p=0.55).

CONCLUSIONS

Surgical sutures coated with triclosan do not appear to be effective in reducing the rate of SSI.

Role of oxidized regenerated cellulose in preventing infections at the surgical site: prospective, randomized study in 98 patients affected by a dirty wound

AIM

The aim of this study was to evaluate whether oxidized regenerated cellulose (ORC), applied to "dirty" surgical wounds, is able to reduce the microbial load and, consequently, the infection rate as compared to conventional local wound treatment.

METHODS

The study included 98 patients who underwent intestinal recanalization procedures between December 2003 and December 2008, with the stoma as the surgical site. Authors considered several risk factors for SSI. The patients were divided into two groups. In group A (50 patients), the surgical wound, previous site of the stoma, was packed with ORC, whereas in group B (48 patients) gauze soaked in iodine was used. Microbial contamination was evaluated with three swabs (in subcutaneous tissue and the dermis), in the operating room before wound packing and on the 2nd and 3rd postoperative day (before suturing the skin).

RESULTS

There were no cases of wound dehiscence and no clinically evident superficial or deep surgical site infections in either group. Analysis of all data revealed that there was no or reduced bacterial contamination in the second and third swab in 33 patients (66%) of Group A versus 12 patients (25%) of Group B.

CONCLUSION

Although it is necessary to consider all factors which can have an influence on SSI and use all the means shown to be effective to reduce the risk of SSI, there is a rationale for using ORC to prevent this kind of infection, especially in patients who undergo "dirty" surgery.

How can the assessment of fistula-inano be improved?

PURPOSE

Fistula-in-ano anatomy and its relationship with anal sphincters are important factors influencing the results of surgical management. Preoperative definition of fistulous track(s) and the internal opening play a primary role in minimizing iatrogenic damage to the sphincters and recurrence of the fistula.

METHODS

Physical examination and endoanal ultrasound (performed with a 10 MHz endoprobe), either conventionally or with an injection of hydrogen peroxide, were performed in 26 consecutive patients. Results were matched with surgical features to establish their accuracy in preoperative fistula-in-ano assessment.

RESULTS

Accuracy rates of clinical examination endoanal ultrasound, and hydrogen peroxide-enhanced ultrasound were 65.4, 50, and 76.9 percent for primary tracks, 73.1, 65.4, and 88.5 percent for secondary tracks, and 80.8, 80.8, and 92.3 percent for horseshoe extensions, respectively. Compared with physical examination and endoanal ultrasound, accuracy of hydrogen peroxide-enhanced ultrasound was higher for transsphincteric and intersphincteric primary tracks and horseshoe extensions. Both endoanal ultrasound and hydrogen peroxide-enhanced ultrasound displayed a significantly higher accuracy in detecting the internal openings (53.8 and 53.8 percent, respectively) compared with clinical evaluation (23.1 percent; P = 0.027).

CONCLUSIONS

Our data suggest that hydrogen peroxide-enhanced ultrasound can be very reliable and useful in the definition of fistula anatomy, its relationship with anal sphincters, and, hence, surgical strategy. It also improves identification of secondary extensions, particularly horseshoe tracks. This method, besides being safe, economic and reputable, both preoperatively and postoperatively, could be helpful in checking operative results and recurrence.

Reducing the occupational risk of infections for the surgeon: multicentric national survey on more than 15,000 surgical procedures

The objective of this study was to find the incidence of accidental exposures to blood and body fluids among surgeons during operations and to describe their dynamics. A probabilistic model was also used to predict the cumulative 30-year risk to the surgeon of contracting hepatitis B and C viruses (HBV, HCV) or human immunodeficiency virus (HIV) infection and estimate the effect of preventive strategies in reducing this risk. A multicentric prospective survey, based on self-administered questionnaires, was conducted during a period of 6 months in 39 Italian hospitals. As accidental exposure to blood or body fluids occurred in 9.2% of 15,375 operations. In about 2% of procedures a parenteral-type injury, such as actual skin puncture or eye contamination, was suffered by the operating surgeon. A needle-stick injury was the commonest accident, and its occurrence was found to vary with the phase of the procedure and its length. The current lifetime risk of acquiring HBV, HCV, and HIV infection in our regions was estimated to be as high as 42.7%, 34.8%, and 0.54%, respectively. The adoption of preventive strategies is expected to reduce this risk to 21% for HBV, 16.6% for HCV, and 0.23% for HIV infection. Active immunization of surgeons against HBV is strongly recommended. The case is also made for the use of a face-shield combined with a permanent change in our surgical practice capable of reducing the current high rate of parenteral injuries.

Carcinoma of the pancreatic head area. Therapy: resectability and surgical management of resectable tumors

Surgical resection is being increasingly performed for carcinomas of the area of the head of the pancreas with curative intent. Pre-and intraoperative assessment of the site of origin and the stage of the lesion is of the utmost importance for a more favorable prognosis of non pancreatic forms and for a better evaluation of long term results of treatment adopted. Staging of non pancreatic periampullary tumors is usually very precise since they are most often shown to be resectable on laparotomy. Surgical resection by pancreaticoduodenectomy is the treatment of election based on good long term results. To the contrary, problems involved in the carcinoma of the head of the pancreas are non negligible. Some aspects related to the criteria of resectability of these tumors (diameter of primary lesion, infiltration of adjacent organs and large vessels, lymph node involvement) are discussed. How extensive pancreatic resection (subtotal, total or regional pancreatectomy) should be, is still a debated subject. In fact, it is not directly proportional to an improvement in prognosis. Complementary treatments directed to the improvement of the disappointing results at present achieved with surgery alone, are desirable.

Carcinoma of the pancreatic head area. Therapy: intraoperative radiotherapy

Pancreatic tumors represent a major field of application of intraoperative radiotherapy (IORT) with electron beams. First clinical studies were carried out principally on unresectable tumors and control of pain was observed in most of them. However, as for prognosis, IORT alone has yielded disappointing results. The use of IORT to boost external beam radiotherapy (ERT) frequently applied in recent trials, has improved local control but not survival rate because of the high incidence of abdominal metastasis. To-date, results of IORT used as an adjuvant to radical surgery have been controversial. As in unresectable tumors, studies have been focused on the combination IORT+ERT, however the intensification of the dose delivered to the tumor bed and the consequent better local control has not resulted in a better prognosis. A more significant contribution of IORT to the treatment of pancreatic tumors may come in the future from the combination of IORT with more effective methods in the control of the abdominal disease ("prophylactic" ERT to the liver or upper abdomen, intra-arterial or intraperitoneal chemotherapy) or from variously timed combinations with ERT (neoadjuvant ERT+IORT).

Digestive and nutritional consequences of pancreatic resections. The classical vs the pylorus-sparing procedure

Digestive and nutritional alterations are a common occurrence after pancreatic resections. The authors report the results of a multiparametric evaluation performed in a group of 26 patients submitted to total or cephalic pancreatectomy. Patients were divided into two groups according to the surgical procedure; group A (n = 13) included gastroresected patients and group B (n = 13) included those submitted to pylorus-sparing pancreatic resection. Subclinical digestive and absorptive impairment has been found in 61.5% of group A patients; the nutritional status was clinically poor in four cases from the same group. Digestive alterations have also been found in 69.2% of group B cases, but nutritional status was always satisfactory in the whole group. The more positive results obtained with the pylorus-sparing technique encourage wider adoption of this procedure.

[Carcinoid neoplasms of Vater;'s ampulla. Apropos a case examined]

Carcinoid tumors of the ampulla are an uncommon finding. The authors report an asymptomatic case of ampullary carcinoid in which the diagnosis was obtained only with definitive histology after radical surgery. The differential diagnosis of these tumors is quite difficult, mostly because they are often asymptomatic. Surgery seems to be the only effective therapy of these lesions; a wide resection with regional lymphectomy should be performed in all cases. Although the prognosis of ampullary carcinoids looks better than for adenocarcinoma and it is related to the tumor size, the history in this case suggests a more extensive indication for radical surgery.

[Controversies about reconstruction after pancreatic resections in neoplasms of the periampullary area]

Extended pancreatic resections have still a significative morbidity: this explains all the technical alternatives proposed to the Whipple procedure. Treatment of the pancreatic stump after cephalic resection and the need of gastric resection are particularly debated today. The Authors, together with a wide literature review, report their experience with 45 patients who underwent cephalic (28 cases), subtotal (4 cases) or total (13 cases) pancreatectomy. Telescope pancreaticojejunostomy showed overall satisfying results (7% of dehiscences), inducing the Authors to use it in all cases. The role of pyloric preservation as proposed by Traverso and Longmire, which strongly reduces nutritional sequelae of pancreatectomy without negative effects on oncological radicality, is emphasized.

Therapeutic embolization of renal artery to control severe hypertension due to renal trauma

In a young patient with a post-traumatic renal hematoma, severe systemic hypertension, secondary to the activation of the renin-angiotensin axis, developed. Because of persistent hypertension, after 3 months of drug therapy, selective percutaneous embolization of the damaged vessels was performed. One year after procedure, the patient is normotensive without drugs.