Prophylactic antibiotics in gynecologic surgery.

A 2-year prospective double-blind study of prophylactic antibiotics in 317 patients undergoing elective total abdominal or vaginal hysterectomy was conducted. Patients randomly received placebo, penicillin, or cefazolin 30 minutes prior to surgery and at 6-hour intervals thereafter for 48 hours. Rigid criteria for postoperative morbidity were established. Vaginal hysterectomy patients given either penicillin or cefazolin prophylaxis had fewer postoperative infections (P less than 0.01) compared to those given placebo. A similar trend was noted among women undergoing abdominal hysterectomy; however, this trend was not statistically significant (P greater than 0.05). Despite continuous surveillance, no change in nosocomial flora or antibiotic sensitivity of bacterial isolates was noted. Adverse drug effects and antibiotic-resistant secondary infections were encountered with similar frequency in all treatment groups.     

Low-dose carbenicillin prophylaxis for vaginal and abdominal hysterectomy.

A double-blind prospective study of 99 patients undergoing vaginal and abdominal hysterectomy was performed at North Carolina Baptist Hospital of the Bowman Gray School of Medicine at Wake Forest University. The study indicated that low-dose intravenous carbenicillin begun preoperatively and continued for 24 hours resulted in decreased febrile morbidity, postoperative infection rate, and shortened hospital stay in patients undergoing both vaginal and abdominal hysterectomy. The indications for operation, clinical characteristics of patients, and operative and postoperative management were similar for the control and study groups. For the vaginal hysterectomy group, febrile morbidity was reduced from 34.6% in the control group to 7.7% in the group receiving carbenicillin. For patients undergoing abdominal hysterectomy, febrile morbidity was reduced from 54.1% in the control group to 4.0% in the group receiving prophylactic carbenicillin. Similar reductions for the carbenicillin study group in fever index and average total hospital stay were also noted. Urinary tract infections were determined to be present more commonly in the group of patients with febrile morbidity receiving no prophylactic antibiotics. The incidence of pelvic infections were reduced in both carbenicillin-treated groups. This investigation suggests that low-dose carbenicillin prophylaxis is beneficial in reduction of morbidity following both vaginal and abdominal hysterectomy.     

Antibiotic prophylaxis for hysterectomy and cesarean section: Amoxicillin-clavulanic acid versus cefazolin

Objective

To compare amoxycillin-clavulanic acid with cefazolin as short term antibiotic prophylaxis in women undergoing hysterectomy and elective cesarean section.

Method

Sixty women undergoing hysterectomy were randomly assigned either to 2.4g intravenous amoxycillin-clavulanic acid (AMX/CL) or 2g cefazolin 30 min before hysterectomy. One hundred and twenty two women delivered by elective cesarean were randomized to a single dose of either of the above antibiotics at cord clamping. Each patient was assessed daily until discharge for evidence of febrile status and the presence of infection at the operative site and urinary tract.

Results

Infectious morbidity was found in 11% and 12.5% of hysterectomy patients in AMX/CL and cefazolin groups respectively. Ten women had post-cesarean infections (six AMXCL, four cefazolin, P=0.51)

Conclusion

Broad spectrum amoxycillin-clavulanic acid was not superior to cefazolin in the prevention of postoperative infection when given as prophylaxis in hysterectomy and elective cesarean cases.     

Effectiveness of infection prevention with latamoxef in vaginal hysterectomy. A prospective study

A prospective clinical trial was designed to examine the influence of a single-dose prophylaxis with 2 g Latamoxef on postoperative infectious morbidity in women undergoing vaginal hysterectomy. 91 vaginal hysterectomies with latamoxef prophylaxis were compared with a similar group of 99 patients without prophylaxis. Patients in the latamoxef group had significantly less postoperative infectious morbidity (23.1%) than those in the non prophylaxis group (45.1%). Prophylactic latamoxef reduced postoperative additional antibiotic therapy in the prophylaxis group significantly. The postoperative infectious morbidity (urinary tract infections, pelvic infections, febrile morbidity) was significantly reduced by a single-dose prophylaxis with 2 g Latamoxef.     

Prophylactic antibiotic administration prior to hysterectomy: a quality improvement initiative

OBJECTIVE: To determine whether institution of a preoperative antibiotic policy could increase the use of prophylactic antibiotics prior to hysterectomy. STUDY DESIGN: A retrospective cohort study of 400 women who underwent abdominal, vaginal or laparoscopic hysterectomy for benign indications at Women and Infants Hospital was performed. Rates and timing of prophylactic preoperative antibiotic administration were determined, as were the rates of postoperative febrile morbidity. These data were compared to data collected in a medical record review of 686 hysterectomies performed prior to institution of the antibiotic policy. RESULTS: Prior to the institution of the antibiotic policy, 50% of patients (342/686, 95% CI 46.0, 53.7) received prophylactic preoperative antibiotics. After introduction of the antibiotic policy, 91.2% (95% CI 88.0, 93.8) of patients received prophylactic preoperative antibiotics. Approximately 66% of the antibiotics were administered within the 60 minutes preceding the surgical incision. Postoperative febrile morbidity was noted in 14% of patients prior to the antibiotic policy as compared to 11% of patients after the policy was instituted. Abdominal surgical approach was found to be a clinically and statistically significant risk factor for febrile morbidity (OR = 7.0; 95% CI 2.3, 20.9). CONCLUSION: Rates of prophylactic preoperative antibiotic administration significantly increased after institution of a hospital policy advocating routine antibiotic prophylaxis prior to hysterectomy. Additional steps must be taken to ensure more routine and appropriately timed administration of antibiotics prior to hysterectomy and to continuously monitor the use of prophylactic antibiotics.     

Short-term prophylactic antibiotic for elective abdominal hysterectomy: how short?

A prospective double-blind study was conducted in order to evaluate the effect of antibiotic prophylaxis on patients undergoing elective abdominal hysterectomy. In the first stage of the study, 116 patients received, on call to the operating room and subsequently 8 and 16 h post-operatively, cefazolin sodium or placebo. In the second stage of the study, 90 patients received the same antibiotics, but treatment was extended to 6 doses, 8 h apart. Of the 53 women who received placebo, 27 (50.9%) became morbid, while only 15 of the 63 (23.8%) who received 24 h prophylaxis were classified as morbid (p less than 0.005). By extending the prophylactic treatment to 48 h further reduction of the morbidity was achieved. Of the 90 patients only 11 (12.2%) became morbid (P less than 0.005). When morbidity rates were compared between different ethnic groups, over-weight and normal weight patients, pre- and post-menopausal women, it was not possible to define a group which is at a higher risk for post-operative morbidity. It was thus concluded that prophylactic antibiotics should be administered routinely to all patients undergoing abdominal hysterectomy, preferably for 48 h.     

Antibiotic prevention of infections complicating radical abdominal hysterectomy

In this randomized, double-blind study, the effectiveness of a single-agent prophylactic antibiotic in reducing infections after radical abdominal hysterectomy with pelvic and para-aortic lymphadenectomy was compared with a placebo. A total of 12 doses of cefoxitin (2g) or placebo were given to 70 patients, starting the evening before surgery. Because of tumor spread beyond the cervix, radical hysterectomy was not performed in 17 patients who were, therefore, excluded from the study. Analysis of 53 patients who completed the study revealed that 15% of cefoxitin patients had surgical site-related infections compared with 52% of placebo patients (P = .005). Significant differences between the groups were also observed in nonsurgical site-related infections (23 versus 48%), overall morbidity (58 versus 89%), and the need for additional antibiotic therapy (38 versus 67%). Socioeconomic status was a significant risk factor with 57% of staff patients demonstrating increased site-related infections as compared with 17% of private patients (P = .002). No clinically significant side effects were observed. The authors recommend the use of antibiotic prophylaxis in patients undergoing radical abdominal hysterectomy for gynecologic malignancies.     

Endometrial and vaginal cuff bacteria recovered at elective hysterectomy during a trial of antibiotic prophylaxis

The utility of culturing the cut edge of the vaginal cuff and endometrium of the uterine specimens of patients undergoing elective hysterectomy and receiving antibiotic prophylaxis has been critically examined. Subjects for this study represent a randomized subpopulation of patients participating in a larger controlled, prospective, double-blind study of antibiotic prophylaxis which has been conducted at Yale-New Haven Hospital during the past five years. On the basis of the organisms recovered, speculation is raised concerning the existence of an endometrial flora and the mechanisms of postoperative vaginal cuff infection in patients treated and not treated with antibiotic prophylaxis at the time of hysterectomy.     

Cefazolin for hysterectomy prophylaxis

Efficacy data for single-dose cefazolin prophylaxis at hysterectomy are meager, and there are none evaluating the impact of route of administration on efficacy. For these reasons, 772 women undergoing elective abdominal or vaginal hysterectomy for benign diseases were given 1 g cefazolin either intramuscularly or intravenously in a randomized clinical trial. Preoperative diagnoses and clinical, surgical, and outcome variables were similar by route of administration for each surgical approach. Risk factors for infection after abdominal hysterectomy included younger age, lower postoperative hemoglobin concentration, and pelvic hematoma; women who developed infection after vaginal hysterectomy were heavier than those who remained uninfected and were more likely to have a pelvic hematoma. The overall incidence of major operative site infection requiring parenteral antimicrobial therapy in evaluable women was 7.2%: 7.6% for 539 women undergoing abdominal hysterectomy and 6.3% for 207 women undergoing vaginal hysterectomy. Postoperative infection was unrelated to route of cefazolin administration.     

Ceftriaxone and cefazolin prophylaxis for hysterectomy

Two hundred and twenty-five women scheduled for elective hysterectomy were entered into a prospective, comparative, randomized, double-blind clinical trial of antibiotic prophylaxis; 117 had vaginal hysterectomy and 108 had abdominal hysterectomy. They were given a 1 gram preoperative dose of ceftriaxone, an investigational cephalosporin or three 1 gram parenteral doses of cefazolin over a 16 hour period. Antibiotic concentrations were measured in serum and vagina, myometrium, fallopian tube or ovary and mean ceftriaxone concentrations were consistently higher than those of cefazolin. Both regimens were safe, well tolerated and equally effective at preventing major postoperative infection. Diabetes increased the risk for infection regardless of regimen and surgical approach (p = 0.009) and specific risk factors were identified for women undergoing vaginal hysterectomy. The incidence of infection was 1.7 per cent after vaginal hysterectomy, significantly lower than the 7.4 per cent observed after abdominal hysterectomy (p = 0.039). Several of the clinical and surgical variables were identified that could explain this difference.     

Cost-benefit analysis of cephradine and mezlocillin prophylaxis for abdominal and vaginal hysterectomy

Four hundred patients (300 abdominal and 100 vaginal hysterectomies) were randomized to receive a single, pre-operative intravenous injection of saline (placebo), 2 g cephradine or 5 g mezlocillin. The frequency of wound and pelvic infections was significantly reduced (P less than 0.05, chi 2- or Fisher's exact test) in the abdominal hysterectomy patients who received cephradine (16% vs 23% mezlocillin, 29% placebo) and in the vaginal hysterectomy patients who received cephradine or mezlocillin (0% mezlocillin, 6% cephradine vs 27% placebo). These results are similar to those of previous studies and suggest that prophylaxis is more effective for vaginal than for abdominal hysterectomy. However, a cost-benefit analysis supported the opposite conclusion. Cephradine prophylaxis for abdominal hysterectomy resulted in cost savings to the hospital and the community health services with measurable benefits to the patient. In contrast, cephradine or mezlocillin prophylaxis for vaginal hysterectomy resulted in increased costs to the hospital, no savings to community services and no significant benefit to the patient. We conclude that cost-benefit analysis provided valuable additional information to the conventional, statistical analysis of wound or pelvic infection rates.     

Prophylaxis of minor febrile and major infectious morbidity following hysterectomy.

A retrospective analysis was conducted of 668 consecutive cases using T-tube suction drainage and/or prophylactic antibiotics as infection prophylaxis for hysterectomy. The data are analyzed for the incidence of minor febrile morbidity (temperature greater than 100.4 for 2 days) and for major infection (hospital stay more than 14 days, reoperation or readmission for the management of pelvic abscess or pelvic thrombophlebitis). The study also compares a minor febrile and major infection group with a noninfected group by measuring parameters of patient discomfort, medical staff effort, and financial costs. It is concluded that 1) minor febrile morbidity frequently follows abdominal (20--30%) and vaginal (30--50%) hysterectomy; 2) minor febrile morbidity has temporary but significant consequences in the form of increased patient discomfort, medical staff effort, and financial costs; 3) major infections are rare following abdominal hysterectomy (less than 0.5%) and uncommon following vaginal hysterectomy (1--4%); 4) suction drainage used alone, prophylactic antibiotics used alone, or a combination of suction drainage and antibiotic prophylaxis is each associated with a statistically significant reduction in the incidence of minor febrile morbidity following both abdominal and vaginal hysterectomy (P = less than 0.01); and 5) such infection prophylaxis may also reduce the incidence of major infection following vaginal hysterectomy.     

Broad spectrum antibiotics as short term prophylaxis for elective abdominal hysterectomy: comparison of mezlocillin, cefazolin and placebo

A prospective randomized placebo controlled double-blind study was conducted in order to evaluate the effect of short term perioperative antibiotic prophylaxis on patients undergoing elective abdominal hysterectomy. Fifty-two patients received 3 doses of 0.5 g cefazolin, 54 patients received 3 doses of 1 g mezlocillin and 53 patients received placebo. Postoperative infectious morbidity and the rate of pelvic cellulitis were significantly lower in either antibiotic group in comparison to the placebo group, but neither drug proved to be superior in this respect. The fever index was significantly lower in the mezlocillin group in comparison to both cefazolin and placebo groups. It was thus concluded that antibiotic prophylaxis has a beneficial effect on patients undergoing abdominal hysterectomy and both drugs--cefazolin and mezlocillin--seem to be equally effective.     

The effect of a short-term course of antibiotic prophylaxis on patients undergoing total abdominal hysterectomy

A prospective double-blind study of antibiotic prophylaxis in 69 patients undergoing total abdominal hysterectomy was conducted. A short, 1-day course of cefazolin prophylaxis effectively decreased febrile morbidity, serious postoperative infections and hospital stay. Resistant infections or delayed infections were not encountered in this series of prophylactically treated patients. There was no difference between the active drug group and the placebo group in the frequency with which aerobic Gram-negative rods and the incidence of cephalosporin-resistant organisms cultured postoperatively.     

A prospective randomized double-blind trial of ceftriaxone versus no treatment for abdominal hysterectomy.

The value of preoperative prophylactic parenteral treatment with ceftriaxone at elective abdominal hysterectomy was investigated in a prospective, randomized, double-blind study, in which 157 women participated, 77 in the antibiotic group and 80 in the control group. Increased febrile morbidity and a significant preponderance of women with urinary tract infections were observed in the untreated group, whereas there was no significant difference between the two groups regarding wound infections or infiltration at the top of the vagina. We find no indication for routine prophylactic use of antibiotics at elective abdominal hysterectomy.     

Prophylactic use of antibiotics for nonlaboring patients undergoing cesarean delivery with intact membranes: a meta-analysis

OBJECTIVE: We performed a meta-analysis to examine the role of antibiotic prophylaxis in preventing postoperative infections among nonlaboring women undergoing cesarean delivery with intact membranes. STUDY DESIGN: A computerized literature search was performed with MEDLINE. Studies were included if they contained data on patients undergoing cesarean delivery in the absence of labor and ruptured membranes. Only randomized trials with a placebo control group were included. RESULTS: Seven studies were found. Use of antibiotics decreased the risk of all infectious outcomes reported. When the results of 4 studies were pooled, prophylactic antibiotic use was associated with a significant reduction in postoperative fever (relative risk, 0.25; 95% confidence interval, 0.14-0.44). A similar reduction was noted for endometritis in 4 studies (relative risk, 0.05; 95% confidence interval, 0.01-0.38). Two studies reported on wound infection and showed a trend toward a protective effect (relative risk, 0.59; 95% confidence interval, 0.24-1.45). CONCLUSION: The prophylactic use of antibiotics reduces the risk of postoperative infectious complications after cesarean delivery even in the population at lowest risk.     

Local prevention of infection with metronidazole before vaginal hysterectomy--comparative effect compared with systemic prevention?]

A prospective clinical trial was designed to examine the influence of a local intravaginal application of metronidazole on postoperative infectious morbidity in 114 women undergoing vaginal hysterectomy. On the evening before vaginal hysterectomy, 51 patients received a vaginal suppository of metronidazole (500 mg). These patients were compared with a group of 63 patients who were given a single-shot prophylaxis with 1,500 mg cefuroxime intravenously. With regard to febrile morbidity, urinary tract infection and pelvic infection there was no significant difference in the two treatment groups. There was no statistically significant difference in the postoperative duration of hospital stay and additional antibiotic therapy between the two groups either. We did not see serious infections in our examination. Our results suggest that a local single-dose application of metronidazole in vaginal hysterectomy might have the same efficacy on postoperative infectious morbidity than a systemic antibiotic prophylaxis and that it can reduce antibiotic costs.     

Hysterectomy in obese women: a comparison of abdominal and vaginal routes

OBJECTIVE: To compare perioperative outcome measures of abdominal and vaginal hysterectomies in obese women. METHODS: We reviewed the charts of all obese women (body mass index more than 30 kg/m(2)) who underwent abdominal or vaginal hysterectomy for benign gynecologic conditions in our institution between 1997 and 2002. Laparoscopically assisted vaginal hysterectomies and hysterectomies with concomitant major pelvic or abdominal surgery were excluded. The rate of operative and postoperative complications, length of hospitalization, operative time, and perioperative change of hemoglobin concentration were analyzed for abdominal hysterectomy and vaginal hysterectomy. RESULTS: The study group consisted of 369 obese women, of whom 189 (51.2%) underwent abdominal, and 180 (48.8%), vaginal hysterectomy. Patient characteristics were statistically comparable between the groups except for uterine weight, which was higher in the abdominal group, and parity, which was greater for women who underwent vaginal hysterectomy (P <.05). After controlling for all the significantly different variables, vaginal hysterectomy resulted in lower incidence of postoperative fever (odds ratio [OR] 0.22, 95% confidence interval [CI] 0.12-0.39), ileus (OR 0.21, 95% CI 0.06-0.75), urinary tract infection (OR 0.21, 95% CI 0.06-0.75), shorter operative time (126.8 +/- 58.7 minutes compared with 109.7 +/- 68.5 minutes) and length of hospital stay (3.5 +/- 1.9 days compared with 1.9 +/- 1.1 days). Seven women (3.7%) who underwent abdominal hysterectomy developed wound infections during their hospital stay compared with none in the vaginal hysterectomy group. CONCLUSION: For obese women, vaginal hysterectomy is superior due to its lower incidence of postoperative fever, ileus, and urinary tract infection and shorter operative time and hospital stay. LEVEL OF EVIDENCE: II-2     

Wound infection in gynecologic surgery

OBJECTIVE: We sought to determine the wound infection rate among patients undergoing elective gynecologic surgery at a single tertiary care center and to determine the predictive value of various factors that contribute to infection. We further investigated the adequacy of hospital records in documenting infection rates as well as the timing of presentation of wound infections. METHODS: The records of 115 patients undergoing elective gynecologic surgery at our institution were reviewed. Patients were further subdivided based on route of surgery. We analyzed the importance of antibiotic prophylaxis, route of surgery, smoking, diabetes, and body mass index (BMI). RESULTS: The overall wound infection rate was 12.17% with no significant difference in the subgroups by route of surgery. Overall, antibiotic prophylaxis significantly decreased infection rates (P = 0.0118), but the route of surgery, BMI, smoking, and diabetes were not significant predictors of infection. Only one case of infection was detected during the initial hospital stay (6.1%). Fifty percent of the patients with infection required readmission, and of these 35.7% required an additional surgical procedure. The average length of hospital stay was 2.4 days longer in patients with infection. CONCLUSIONS: Antibiotic prophylaxis has a role in the management of patients undergoing abdominal gynecologic surgery. In today's environment of cost containment, an increased hospital stay and the added likelihood of additional surgical intervention associated with wound infection are important targets for prevention. Most patients with wound infection were diagnosed after discharge from the hospital. In our population, among whom transportation problems and remote residence are prevalent, strategies for infection surveillance should be integral to discharge planning.