BACKGROUND: The amount of imaging studies performed for disease diagnosis has been rapidly increasing. We examined the amount of radiation exposure that pediatric trauma patients receive because they are an at-risk population. Our hypothesis was that pediatric trauma patients are exposed to high levels of radiation during a single hospital visit.

METHODS: Retrospective review of children who presented to Johns Hopkins Pediatric Trauma Center from July 1, 2004, to June 30, 2005. Radiographic studies were recorded for each patient and doses were calculated to give a total effective dose of radiation. All radiographic studies that each child received during evaluation, including any associated hospital admission, were included.

RESULTS: A total of 945 children were evaluated during the study year. A total of 719 children were included in the analysis. Mean age was 7.8 (+/-4.6) years. Four thousand six hundred three radiographic studies were performed; 1,457 were computed tomography (CT) studies (31.7%). Average radiation dose was 12.8 (+/-12) mSv. We found that while CT accounted for only 31.7% of the radiologic studies performed, it accounted for 91% of the total radiation dose. Mean dose for admitted children was 17.9 (+/-13.8) mSv. Mean dose for discharged children was 8.4 (+/-7.8) mSv (p < 0.0001). Burn injuries had the lowest radiation dose [1.2 (+/-2.6) mSv], whereas motor vehicle collision victims had the highest dose [18.8 (+/-14.7) mSv].

CONCLUSION: When the use of radiologic imaging is considered essential, cumulative radiation exposure can be high. In young children with relatively long life spans, the benefit of each imaging study and the cumulative radiation dose should be weighed against the long-term risks of increased exposure.

Abstract

PURPOSE OF REVIEW: Local anesthetics are not only used as drugs to block the sodium channel to provide analgesia and antiarrhythmic action. The purpose of this review is to highlight the new indications and limitations of this class of drugs.

RECENT FINDINGS: Recent research has focused on the use of intravenous local anesthetics to improve bowel function after surgery or trauma, to protect the central nervous system, to find new clues about local anesthetic effects in chronic neuropathic pain, and to investigate the long-term effect of anesthesia/analgesia provided by local anesthetics on cancer recurrence. Recent facts dealing with myotoxicity and chondrotoxicity are presented.

SUMMARY: There is growing evidence that local anesthetics have a broad spectrum of indications in addition to analgesia and antiarrhythmic effect. Most of them are still insufficiently known and investigated. These new indications will no doubt be intensively studied in the coming years.

Abstract

PURPOSE: The purpose of this study was to determine the best wound infection prophylaxis in pediatric acute appendicitis.

METHODS: From 1969 to 1995 inclusive, 453 consecutive pediatric patients at the same children’s hospital had an appendix with acute inflammation (acute appendicitis) removed by the same staff surgeon and his resident. The stump was not inverted, and chromic catgut was used throughout. No intraperitoneal antibiotics, irrigation, or drains were used, and the skin closure was with silk sutures initially and then with staples since 1986. The infants and children were divided into 6 consecutive groups of 52 to 96 patients, with each group lasting 2 to 5 years. The wound treatment groups were as follows: no treatment, drain or pack, drain or pack plus antibiotic powder, antibiotic powder, preoperative intravenous antibiotic plus antibiotic powder, and preoperative intravenous antibiotic. The wound Penrose drain, one half-inch gauze pack, and/or antibiotic powder (ampicillin, 1977-1981; cefoxitin, 1982-1995) were all placed in the subcutaneous space.

RESULTS: There were a total of 50 (11%) wound infections (pus) that occurred between 4 and 40 days when no antibiotic powder was used and 2 to 14 days with antibiotic powder. In all 6 groups of patients, no organism was grown in most (80%) infections and Escherichia coli was the second commonest (12%). The serous ooze, which occurred only with the use of antibiotic powder (8%), was seen between 6 and 18 days, and no organism was ever cultured.

CONCLUSIONS: The patients with preoperative (or intraoperative) intravenous antibiotics (cefoxitin) plus wound antibiotic powder (cefoxitin) had the lowest infection rate (2.5%). When this group was compared with the baseline group 1 (no treatment), it was the only group in which wound treatment made a significant difference (P = .003).

Abstract

Surgical wound infections (WI) remain a significant source of postoperative morbidity. This epidemiologic study was undertaken to determine retrospectively the incidence of postoperative WI in children in a university hospital and include critical comparisons of pediatric surgery WI rates between different international reports. As few data exist on postoperative WIs in pediatric patients, in contrast to numerous reports in adults, all infants and children undergoing operations in the pediatric surgical service in our institution during a 7-year period were reviewed for development of a WI, a total of 537 patients who underwent 575 operations. WIs occurred in 39 cases (6.7%). Clean wounds (56.8% of patients) had an infection rate of 2.7%, clean-contaminated (23.1%) 10.5%, contaminated (12.9%) 13.5%, and dirty/infected (7.2%) 14.6%. Increasing duration of operation ( P < 0.001), contamination at operation ( P < 0.001), and a new element in the operation – a resident or intern – ( P < 0.001) were all associated with a higher incidence of infection, despite efforts at infection-control practices including improved sterilization methods and barriers, surgical technique, and availability of antimicrobial prophylaxis. The total incidence of wound infection in this population was comparable to that in other reports. Comparing children who developed a wound infection with those who did not, there were no significant differences in age, sex, American Society of Anesthesiologists preoperative assessment score, length of preoperative hospitalization, location of operation (intensive care unit vs operating room), the presence of a coexisting disease or remote infection, or the use of perioperative antibiotics. These baseline data may aid in forming strategies to lower the risk of WI in children. Our results suggest that WIs in children are related more to factors at operation than to the patients overall physiologic status.

Abstract

BACKGROUND: The Surgical Infection Society published their most recent recommendations for antimicrobial therapy in patients with intra-abdominal infections in 2002. These guidelines outlined several important considerations for the treatment of such infections, including which patients require antimicrobial agents, the appropriate duration of treatment, which antimicrobial regimens are appropriate, and the risk factors and indications for intensified regimens. However, the applicability of these recommendations to the pediatric population is not entirely clear.

METHODS: Systematic review of all literature regarding antimicrobial therapy in the most common intra-abdominal infection in children, appendicitis, with the goal of establishing guidelines for use.

RESULTS: Children with uncomplicated (acute or gangrenous), but not perforated, appendicitis can be treated with prophylactic antimicrobial agents for 24 h or less. Children with perforated appendicitis can be treated after appendectomy in the same manner as adults with established intra-abdominal infections; i.e., with therapeutic antibiotics until no clinical evidence of infection exists. This is true after both laparoscopic and open operations. Whereas “triple” antibiotic therapy has been the gold standard in pediatric patients, monotherapy with broad-spectrum agents is equally effective and possibly more cost-effective. The nonoperative management of perforated appendicitis with interval appendectomy represents a unique problem, and guidelines for therapy are less well established.

CONCLUSIONS: The evidence supports using guidelines in the pediatric population similar to those suggested for the adult population for the management of acute appendicitis.

Abstract

The purpose of this study was to determine, by means of a systematic review, whether the method of wound closure in complicated appendicitis affects the incidence of wound infection. A comprehensive literature search of multiple databases including MEDLINE (1980-2003), was performed, using the Cochrane search strategy, for articles on wound closure and complicated appendicitis. Clinical trials examining the method of wound closure were selected for systematic review and all quasi-randomized and randomized trials underwent meta-analysis. Failure to close the wound as planned in delayed closure (DC) was considered indicative of a wound infection. Purulent drainage requiring wound opening indicated an infection in the wounds closed primarily. Six randomized trials were considered adequate for meta-analysis. None independently showed a statistically significant difference in the risk of developing a wound infection with primary closure (PC). When pooled data were subjected to meta-analysis, PC achieved a statistically significant reduction in the relative risk of treatment failure and did not lead to an increase in wound infections. Primary closure does not increase the risk of developing a wound infection after operation for perforated appendicitis. Given the lack of benefit of DC, and the less traumatic, less painful, and less costly nature of PC; primary closure is a safe and practical treatment option.

Abstract

BACKGROUND: The use of antibiotics in uncomplicated appendicitis in children, remains the area of controversy. The aim of the study was to assess the necessity of antibiotic administration in nonperforated appendicitis in children.

MATERIAL AND METHODS: The design of the study was a double blind randomized controlled trial, with a follow-up of 4 to 20 months. Setting: Surgical Department in a University Pediatric Hospital. Patients: One hundred and eighty seven out of 249 children subjected to emergency appendectomies met the inclusion criteria, with 35 eligible but not included in the study. The remaining 152 patients were randomized; 41 had complicated appendicitis, 3 other diagnosis, 108 were analyzed within 3 study groups: 1 (n = 31) no antibiotic, 2 (n = 41) one dose, 3 (n = 36) 5-day course. Open appendectomy was a surgical procedure and Ceftriaxone 1.0 g i.v. was administered. Investigated parameters were: body temperature, WBC, bowel sounds, wound healing, recovery and morbidity.

RESULTS: Valid outcome data were available for 90 of 108 randomized patients. Protocols of 18 children due to fever > 39 degrees C, upper airway infection or allergy were disclosed. In the remaining 90 children, there were no differences in WBC and oral feeding between groups 1 (n = 24), 2 (n = 35) and 3 (n = 31). Group 1 and 2 had a higher mean temperature on day 1 post-op, without any clinical significance. A higher mean temperature was noted on day 5 post-op in group 1, due to wound infection in one patient. There were no intraabdominal abscesses. The only other complications were 2 adhesion small bowel obstructions (in groups 1 and 2 each).

CONCLUSION: Routine use of antibiotics in nonperforated appendicitis in children is not necessary.

Abstract

In January 2003, leadership of the Medicare National Surgical Infection Prevention Project hosted the Surgical Infection Prevention Guideline Writers Workgroup meeting. The objectives were to review areas of agreement among the published guidelines for surgical antimicrobial prophylaxis, to address inconsistencies, and to discuss issues not currently addressed. The participants included authors from most of the published North American guidelines for antimicrobial prophylaxis and several specialty colleges. The workgroup reviewed currently published guidelines for antimicrobial prophylaxis. Nominal group process was used to draft a consensus paper that was widely circulated for comment. The consensus positions of the workgroup include that infusion of the first antimicrobial dose should begin within 60 minutes before surgical incision and that prophylactic antimicrobial agents should be discontinued within 24 hours of the end of surgery. This advisory statement provides an overview of other issues related to antimicrobial prophylaxis including specific suggestions regarding antimicrobial selection.