Perioperative outcomes of anterior lumbar surgery in obese versus non-obese patients
ABSTRACT Anterior lumbar surgery is a common procedure for anterior lumbar interbody fusion and disc replacement but the impact of obesity on this procedure has not been determined.
To assess the perioperative outcomes of anterior retroperitoneal lumbar surgery in obese versus non-obese patients.
Prospective review of patients with anterior retroperitoneal lumbar disc procedures
Seventy-four patients with anterior retroperitoneal lumbar disc procedures performed were evaluated.
Access-related parameters included tissue depth (skin-to-fascia and fascia-to-spine depths), length of incision, estimated blood loss during the anterior procedure, the duration of the anterior exposure, and the duration of the entire anterior procedure. Outcome measures included complications attributable to the anterior procedure, analgesic use, length of time to ambulation, and length of hospitalization.
Seventy-four anterior retroperitoneal lumbar disc procedures were prospectively analyzed. Patient age, sex, body mass index, comorbidities, diagnosis, and operative parameters were collected. Access-related parameters and outcome measures were compared between obese and non-obese patients. Obesity was defined as body mass index greater than or equal to 30.
There were 35 males and 39 females. Mean age was 46.6 years. The main diagnosis (63.5%) was discogenic back pain. Forty-one (55%) patients were non-obese and 33 were obese. The two patient groups were comparable in terms of age, sex, diagnosis, mean number of anterior levels operated, and previous abdominal surgery (all p>.05). In obese patients, there were two iliac vein lacerations (major complication rate, 6.1%), one superficial infection, and one urinary tract infection (minor complication rate, 6.1%). In non-obese patients, there were two iliac vein lacerations, one intestinal serosal tear (major complication rate, 7.3%), and two urinary tract infections (minor complication rate, 4.9%). There was no significant difference in the complication rates between obese and non-obese patients (p=.6). Obese patients have significantly longer duration of anterior exposure, duration of entire anterior surgery, longer length of anterior incision, and more depth from skin to fascia and from fascia to spine compared with non-obese patients. However, obesity does not affect blood loss, analgesic use, length of time to ambulation, and length of hospitalization.
Perioperative outcomes in obese and non-obese patients were comparable and obesity is not related to an increased risk of morbidity in anterior lumbar surgery.
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ABSTRACT: Objective. The purpose of this study was to evaluate a new questionnaire to assess outcomes related to the midline anterior lumbar approach and to identify risk factors for negative patient responses. Methods. A retrospective review of 58 patients who underwent anterior lumbar surgery at a single institution for either degenerative disc disease or spondylolisthesis in 2009 was performed. The outcome measures included our newly developed Anterior Lumbar Surgery Questionnaire (ALSQ), ODI, and EQ-5D. Results. There were 58 patients available for followup, 27 women and 31 men. The average age at surgery was 50.8 years, with an average followup of 2.92 years. The average change in ODI was 34.94 (22.7) and EQ-5D was 0.28 (0.29). The rate of complications with the anterior approach was 10.3% and there was one male patient (3.2%) with retrograde ejaculation. Determination of the effectiveness of the new ALSQ revealed that it significantly correlated to the EQ-5D and ODI (P < 0.05). Smoking was associated with a negative response on thirteen questions. BMP use was not associated with a negative response on any sexual function questions. Conclusions. Our new Anterior Lumbar Surgery Questionnaire determines patient perceived complications related to the midline anterior lumbar surgical approach.12/2014; 2014:142604. DOI:10.1155/2014/142604
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ABSTRACT: Study Design. Observational retrospective cohort study of prospectively collected database.Objective. To determine whether overweight body mass index (BMI) influences 30-day outcomes of elective spine surgery.Summary of Background Data. Obesity is prevalent in the United States, but its impact on the outcome of elective spine surgery remains controversial.Methods. We used National Surgical Quality Improvement Program, a prospective clinical database with proven validity and reproducibility consisting of 256 perioperative standardized variables from surgical patients at nearly 400 academic and non-academic hospitals nationwide. We identified 49,314 patients who underwent elective fusion, laminectomy or both between 2006 and 2012. We divided patients according to BMI (kg/m) as normal (18.5-24.9), pre-obese (25.0-29.9), obese I (30.0-34.9), obese II (35.0-39.9) and obese III (≥40). Relationship between increased BMI and outcome of surgery measured as prolonged hospitalization, complications, return to the operating room, discharged with continued care, readmission, death was determined using logistic regression before and after propensity score matching.Results. All overweight patients (BMI≥25 kg/m) showed increased odds of an adverse outcome compared to normal patients in unmatched analyses, with maximal effect seen in obese III group. In the propensity-matched sample, obese III patients continued to show increased odds for complications (Odds Ratio, OR, 1.6, 95% confidence interval 1.1-2.3), readmission (2.3, 1.1-4.9), and return to the operating room (1.8, 1.1-3.1).Conclusions. Impact of obesity on elective spine surgery outcome is mediated, at least in part, by comorbidities in patients with BMI between 25.0 and 39.9 kg/m. However, BMI itself is an independent risk factor for adverse outcomes in morbidly obese patients.Spine 05/2014; DOI:10.1097/BRS.0000000000000435 · 2.45 Impact Factor
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ABSTRACT: OBJECT Minimally invasive spine surgeries (MISSs) have gained immense popularity in the last few years. Concern about the radiation exposure has also been raised. The purpose of this study was to demonstrate the impact of body habitus on the radiation emission during various MISS procedures. The authors also aim to evaluate the effect the surgeon's experience has on the amount of radiation exposure during MISS especially with regard to patient size. METHODS The authors conducted a retrospective analysis of 332 patients who underwent 387 MISS procedures performed at their institution from January 2010 to August 2013 by a single surgeon. The dose of radiation emission available from the fluoroscopic equipment was recorded from the electronic database. The authors analyzed mainly 3 procedure groups: microdiscectomy/decompression (MiDD, n = 211) and transforaminal lumbar interbody fusion (TLIF) either with unilateral instrumentation (UnTLIF, n = 106) or bilateral instrumentation (BiTLIF, n = 70). The patients in each procedure group were divided into 6 categories based on the WHO criteria for obesity: underweight (body mass index [BMI] < 18.50), normal (18.50-24.99), overweight (25.00-29.99), Class 1 obese (30.00-34.99), Class 2 obese (35.00- 39.99), and Class 3 obese (> 40.00). RESULTS Patients who underwent BiTLIF had the highest median radiation exposure (113 mGy, SD 9.44), whereas microdiscectomy required minimal exposure (12.62 mGy, SD 2.75 mGy). There was a significant correlation between radiation emission and BMI of the patients during all MISS procedures (p < 0.05). The median radiation exposure was substantially greater with larger patients (p ≤ 0.001). In the analyses within the procedure groups, radiation exposure was found to be significantly high in patients who were severely obese (Class 2 and Class 3 obesity). The radiation emission was lower during the surgeries performed in 2013 than during those performed in 2010 especially in obese patients; however, this observation was not statistically significant. CONCLUSIONS Body habitus of the patients has a substantial impact on radiation emission during MISS. Severe obesity (BMI ≥ 35) is associated with a significantly greater risk of radiation exposure compared with other weight categories. Surgical experience seems to be associated with lower radiation emission especially in cases in which patients have a higher BMI; however, further studies should be performed to examine this effect.Journal of Neurosurgery Spine 12/2014; 22(2):1-8. DOI:10.3171/2014.10.SPINE14163 · 2.36 Impact Factor