Obese individuals may have normal insulin-glucose homeostasis, insulin resistance, or diabetes mellitus. Whereas gastric bypass cures insulin resistance and diabetes mellitus, its effects on normal ...physiology have not been described. We studied insulin resistance and beta-cell function for patients undergoing gastric bypass.
One hundred thirty-eight patients undergoing gastric bypass had fasting insulin and glucose levels drawn on days 0, 12, 40, 180, and 365. Thirty-one (22%) patients with diabetes mellitus were excluded from this analysis. Homeostatic model of assessment was used to estimate insulin resistance, insulin sensitivity, and beta-cell function. Based on this model, patients were categorized as high insulin resistance if their insulin resistance was >2.3.
Body mass index did not correlate with insulin resistance. Forty-seven (34%) patients were categorized as high insulin resistance. Correction of insulin resistance for this group occurred by 12 days postoperatively. Sixty (43%) patients were categorized as low insulin resistance. They demonstrated an increase of beta-cell function by 12 days postoperatively, which returned to baseline by 6 months. At 1 year postoperatively, the low insulin resistance group had significantly higher beta-cell function per degree of insulin sensitivity.
Adipose mass alone cannot explain insulin resistance. Severely obese individuals can be categorized by degree of insulin resistance, and the effect of gastric bypass depends upon this preoperative physiology.
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EMUNI, FZAB, GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UL, UM, UPUK, VKSCE, ZAGLJ
To report our experience with the first 70 cases of laparoscopic radical prostatectomy. Radical retropubic prostatectomy is an accepted therapy for the management of locally confined prostate cancer. ...Recently, laparoscopic prostatectomy has been introduced as a minimally invasive alternative to open radical prostatectomy. Several published series from Europe have demonstrated that laparoscopic radical prostatectomy is a safe and feasible approach to the management of localized prostate cancer.
From May 2000 to May 2001, transperitoneal laparoscopic radical prostatectomy was performed on 70 men, aged 40 to 76 years, who were appropriate candidates for radical retropubic prostatectomy. Patient characteristics, surgical statistics, and pathologic results were prospectively collected.
The mean preoperative prostate-specific antigen level was 6.6 ng/mL (range 1.5 to 20.7). The preoperative Gleason sum was 6 in 53 patients (75.7%), 7 in 16 (22.9%), and 8 in 1 patient (1.4%). The mean operating time was 274 minutes (range 165 to 495). The estimated blood loss averaged 449 mL (range 50 to 2750), and 4 patients (5.7%) required blood transfusions. In 1 case, we converted to a standard retropubic approach. Two intraoperative (2.9%) and 14 (20%) overall postoperative complications occurred. Positive surgical margins were reported in 8 specimens (11.4%). At a minimum of 3 months’ follow-up, 85% reported use of 0 or 1 pad per day. The operative times, amount of blood loss, and complication rate decreased dramatically with experience.
Laparoscopic radical prostatectomy is a technically demanding procedure that is a feasible option for the surgical treatment of localized prostate cancer. The morbidity of this operation is significantly less than that of radical retropubic prostatectomy. The laparoscopic approach shows significant promise for reducing surgical morbidity and improving the anatomic radical prostatectomy.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
To evaluate the feasibility and potential benefits of hand-assisted laparoscopic surgery with the HandPort System, a new device.
In hand-assisted laparoscopic surgery, the surgeon inserts a hand into ...the abdomen while pneumoperitoneum is maintained. The hand assists laparoscopic instruments and is helpful in complex laparoscopic cases.
A prospective nonrandomized study was initiated with the participation of 10 laparoscopic surgical centers. Surgeons were free to test the device in any situation where they expected a potential advantage over conventional laparoscopy.
Sixty-eight patients were entered in the study. Operations included colorectal procedures (sigmoidectomy, right colectomy, resection rectopexy), splenectomy for splenomegaly, living-related donor nephrectomy, gastric banding for morbid obesity, partial gastrectomy, and various other procedures. Mean incision size for the HandPort was 7.4 cm. Most surgeons (78%) preferred to insert their nondominant hand into the abdomen. Pneumoperitoneum was generally maintained at 14 mmHg, and only one patient required conversion to open surgery as a result of an unmanageable air leak. Hand fatigue during surgery was noted in 20.6%.
The hand-assisted technique appeared to be useful in minimally invasive colorectal surgery, splenectomy for splenomegaly, living-related donor nephrectomy, and procedures considered too complex for a laparoscopic approach. This approach provides excellent means to explore, to retract safely, and to apply immediate hemostasis when needed. Although the data presented here reflect the authors' initial experience, they compare favorably with series of similar procedures performed purely laparoscopically.
Use of laparoscopy in penetrating trauma has been well established; however, its application in blunt trauma is evolving. The authors hypothesized that laparoscopy is safe and feasible as a ...diagnostic and therapeutic modality in both the patients with penetrating and blunt trauma. Trauma registry data and medical records of consecutive patients who underwent laparoscopy for abdominal trauma were reviewed. Over a 4-year period, 43 patients (18 blunt trauma / 25 penetrating trauma) underwent a diagnostic laparoscopy. Conversion to laparotomy occurred in 9 (50%) blunt trauma and 9 (36%) penetrating trauma patients. Diagnostic laparoscopy was negative in 33% of blunt trauma and 52% of penetrating trauma patients. Sensitivity/specificity of laparoscopy in patients with blunt and penetrating trauma was 92%/100% and 90%/100%, respectively. Overall, laparotomy was avoided in 25 (58%) patients. Use of laparoscopy in selected patients with blunt and penetrating abdominal trauma is safe, minimizes nontherapeutic laparotomies, and allows for minimal invasive management of selected intra-abdominal injuries.
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NUK, OILJ, SAZU, UKNU, UL, UM, UPUK
Exaggerated activation of peritoneal immunity after major abdominal surgery activates peritoneal macrophages (PMs), which may lead to a relative local immunosuppression. Although laparoscopy (L) is ...known to elicit a smaller attenuation of peritoneal host defenses, compared with open (O) surgery, effects of the hand-assisted (HA) approach have not been investigated to date.
Eighteen pigs underwent a transabdominal nephrectomy via O, HA, or L approach. PMs were harvested at 4, 12, and 24 hours through an intraperitoneal drain and stimulated in vitro with lipopolysaccharide. The production of interleukin-6 (IL-6) and tumor necrosis factor α (TNF-α) by the purified macrophage cultures was measured with the use of a standard enzyme-linked immunosorbent assay technique. Statistical comparison was performed by using analysis of variance and Student t test.
In vitro lipopolysaccharide–induced IL-6 and TNF-α production by PMs increased over the 24-hour period in all 3 groups. Stimulated PMs harvested at 12 and 24 hours postoperatively secreted higher levels of IL-6 in the O group, compared with both the HA group (
P = .02,
P = .01) and L group (
P = .04,
P = .001). PMs harvested at 4, 12 and 24 hours postoperatively also produced more TNF-α in O group, compared with both the HA group (
P = .03,
P = .03, and
P = .01) and L group (
P = .01,
P = .05 and
P = .03). There was no significant difference between H and L groups in production of either cytokine.
Abdominal surgery attenuates peritoneal host defenses regardless of the surgical approach employed. However, for the first time, we demonstrated that the HA approach, similar to laparoscopy, is superior to open surgery in the degree of PM activation. Overall, in addition to clinical benefits of minimal access, HA surgery may confer an immunologic advantage over laparotomy.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
HYPOTHESIS The advent of laparoscopy has changed the paradigm of surgical training and care delivery for the treatment of patients with acute cholecystitis (AC). DESIGN Retrospective data collection ...and analysis. SETTING Hospital admissions with a primary diagnosis of AC at a tertiary care center from January 1, 2002, to January 1, 2007. PATIENTS During the study period, 923 patients were admitted with a primary diagnosis of AC. One hundred fourteen patients were excluded from the study because of missing data, medical management, incomplete operative notes or documents, or metastatic gastrointestinal cancer. MAIN OUTCOME MEASURES Patient demographics, preoperative morbidity, procedures (medical and surgical), and postoperative outcomes were statistically analyzed using χ2 test, t test, and analysis of variance. RESULTS Eight hundred nine patients (87.6%) with a primary diagnosis of AC underwent surgery by 44 surgeons. Procedures included 663 laparoscopic cholecystectomies (LCs) (82.0%), 9 open cholecystectomies (1.1%), 51 conversions from LC to open cholecystectomy (6.3%), and 86 cholecystostomy tube placements (10.6%). During the study period, cholecystostomy tube placements increased, while open cholecystectomies and conversions from LC to open cholecystectomy decreased (P < .05). Laparoscopic cholecystectomy was associated with significantly better outcomes, including shorter postsurgical stay (2.2 vs 6.3 days for other modalities) and fewer complications (8.5% vs 17.0%). CONCLUSIONS Based on 5-year results from a tertiary care center, LC was performed with a low conversion rate to open surgery and was associated with decreased morbidity and mortality compared with other surgical modalities to treat AC. Our data confirm the benefits and widespread use of LC in the modern era, reflecting changes in the training paradigm and learning curve for laparoscopy.Arch Surg. 2010;145(5):439-444-->
Background
Adrenalectomy remains the definitive therapy for most adrenal neoplasms. Introduced in the 1990s, laparoscopic adrenalectomy is reported to have lower associated morbidity and mortality. ...This study aimed to evaluate national adrenalectomy trends, including major postoperative complications and perioperative mortality.
Methods
The Nationwide Inpatient Sample was queried to identify all adrenalectomies performed during 1998–2006. Univariate and multivariate logistic regression were performed, with adjustments for patient age, sex, comorbidities, indication, year of surgery, laparoscopy, hospital teaching status, and hospital volume. Annual incidence, major in-hospital postoperative complications, and in-hospital mortality were evaluated.
Results
Using weighted national estimate, 40,363 patients with a mean age of 54 years were identified. Men made up 40% of these patients, and 77% of the patients were white. The majority of adrenalectomies (83%) were performed for benign disease. The annual volume of adrenalectomies increased from 3,241 in 1998 to 5,323 in 2006 (
p
< 0.0001, trend analysis). The overall in-hospital mortality was 1.1%, with no significant change. Advanced age (<45 years as the referent; ≥65 years: adjusted odds ratio AOR, 4.10; 95%; confidence Interval CI, 1.66–10.10) and patient comorbidities (Charlson score 0 as the referent; Charlson score ≥2: AOR, 4.33; 96% CI, 2.34–8.02) were independent predictors of in-hospital mortality. Indication, year, hospital teaching status, and hospital volume did not independently affect perioperative mortality. Major postoperative in-hospital complications occurred in 7.2% of the cohort, with a significant increasing trend (1998–2000 5.9% vs 2004–2006 8.1%;
p
< 0.0001, trend analysis). Patient comorbidities (Charlson score 0 as the referent; Charlson score ≥2: AOR, 4.77; 95% CI, 3.71–6.14), recent year of surgery (1998–2000 as the referent; 2004–2006: AOR, 1.40; 95% CI, 1.09–1.78), and benign disease (malignant disease as the referent; benign disease: AOR, 1.98; 95% CI, 1.55–2.53) were predictive of major postoperative complications at multivariable analyses, whereas laparoscopy was protective (no laparoscopy as the referent; laparoscopy: AOR, 0.62; 95% CI, 0.47–0.82).
Conclusion
Adrenalectomy is increasingly performed nationwide for both benign and malignant indications. In this study, whereas perioperative mortality remained low, major postoperative complications increased significantly.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Preoperative hookwire localization of breast lesions is a well established technique to aid surgeons in localizing breast tumors. We describe the innovative use of a standard hookwire with CT ...guidance to localize an intraperitoneal inclusion cyst.
HYPOTHESIS An analysis of patients undergoing laparoscopic Roux-en-Y gastric bypass (RYGB) may identify factors predictive of complication and of suboptimal weight loss. DESIGN Inception cohort. ...SETTING Metropolitan university hospital. PATIENTS One hundred eighty-eight consecutive patients with severe obesity who met National Institutes of Health consensus guidelines for bariatric surgery. INTERVENTIONS Laparoscopic RYGB. MAIN OUTCOME MEASURES Complications requiring therapeutic intervention and percentage of excess body weight lost at 1 year after surgery. RESULTS Of the 188 patients who underwent laparoscopic RYGB, 50 (26.6%) developed complications that required an invasive therapeutic intervention, including 2 deaths. The average follow-up was 351 days (range, 89-1019 days). Multivariate analysis by stepwise logistic regression identified surgeon experience, sleep apnea (P = .003; odds ratio, 3.0; 95% confidence interval, 1.3-7.1), and hypertension (P = .07; odds ratio, 2.0; 95% confidence interval, 1.0-4.0) as predictors of complications. The most common complication requiring therapeutic intervention was stricture at the gastrojejunal anastomosis, occurring in 27 patients (14.4%). Of the 115 patients who underwent surgery more than 1 year previously, 1-year follow-up data were available for 93 (81%). The body mass index (weight in kilograms divided by the square of height in meters) decreased from 53 ± 8 preoperatively to 35 ± 6 at 1 year. The mean ± SD percentage of excess body weight lost at 1 year was 61% ± 14%. Diabetes mellitus was negatively correlated with percentage of excess body weight lost at 1 year (P = .06). CONCLUSIONS Surgeon experience, sleep apnea, and hypertension are associated with complications after laparoscopic RYGB. Diabetes mellitus may be associated with poorer postoperative weight loss.Arch Surg. 2003;138:541-546-->
HYPOTHESIS The use of smaller instruments during laparoscopic cholecystectomy (LC) has been proposed to reduce postoperative pain and improve cosmesis. However, despite several recent trials, the ...effects of the use of miniaturized instruments for LC are not well established. We hypothesized that LC using miniports (M-LC) is safe and produces less incisional pain and better cosmetic results than LC performed conventionally (C-LC). DESIGN A patient- and observer-blinded, randomized, prospective clinical trial. SETTING A tertiary care, university-based hospital. PATIENTS Seventy-nine patients scheduled for an elective LC who agreed to participate in this trial were randomized to undergo surgery using 1 of the 2 instrument sets. The criteria for exclusion were American Society of Anesthesiologists class III or IV, age older than 70 years, liver or coagulation disorders, previous major abdominal surgical procedures, and acute cholecystitis or acute choledocholithiasis. INTERVENTION Laparoscopic cholecystectomy performed with either conventional or miniaturized instruments. MAIN OUTCOME MEASURES Patients’ age, sex, operative time, operative blood loss, intraoperative complications, early and late postoperative incisional pain, and cosmetic results. RESULTS Thirty-three C-LCs and 34 M-LCs were performed and analyzed. There were 8 conversions (24%) to the standard technique in the M-LC group. No intraoperative or major postoperative complications occurred in either group. The average incisional pain score on the first postoperative day was significantly less in the M-LC group (3.9 vs 4.9; P = .04). No significant differences occurred in the mean scores for pain on postoperative days 3, 7, and 28. However, 90% of patients in the M-LC group and only 74% of patients in the C-LC group had no pain (visual analog scale score of 0) at 28 days postoperatively (P = .05). Cosmetic results were superior in the M-LC group according to both the study nurse’s and the patients’ assessments (38.9 vs 28.9; P<.001, and 38.8 vs 33.4; P = .001, respectively). CONCLUSIONS Laparoscopic cholecystectomy can be safely performed using 10-mm umbilical, 5-mm epigastric, 2-mm subcostal, and 2-mm lateral ports. The use of mini-laparoscopic techniques resulted in decreased early postoperative incisional pain, avoided late incisional discomfort, and produced superior cosmetic results. Although improved instrument durability and better optics are needed for widespread use of miniport techniques, this approach can be routinely offered to many properly selected patients undergoing elective LC.Arch Surg. 2005;140:1178-1183-->
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