Faculty Bibliography

BACKGROUND: There is uncertainty regarding which outcomes tools should be used to report the results of treatment for patients with foot and ankle disorders. This study compared the responsiveness of the Foot Function Index (FFI), American Orthopaedic Foot and Ankle Society (AOFAS) Clinical Rating Systems, and Medical Outcomes Study Short Form-36 (SF-36) in patients with foot and ankle surgery. METHODS: Twenty-five patients were recruited at a tertiary referral foot and ankle practice. The mean age of the patient sample was 40 years (range 21 to 69) and 19 were women (76%). Thirteen patients (52%) had conditions affecting the ankle, hindfoot, or midfoot, while 12 patients (48%) had conditions affecting the forefoot. Patients completed packets preoperatively and 6-months postoperatively which included informed consent forms, the FFI, the AOFAS, and the SF-36 questionnaires. Standardized response means (SRM) and effect sizes (ES) were used as the measures of responsiveness and were calculated for the AOFAS scores, the three domains of the FFI, the eight SF-36 sub-scales, and the two SF-36 summary scales. RESULTS: The standardized response mean (SRM) for the AOFAS scores was 1.10 and the effect size (ES) was 1.12. The SRM for the three FFI domains ranged from -0.39 to -0.83, while the ES ranged from -0.55 to -0.86. The SRM for the SF-36 ranged from 0.09 to 0.72 (ES ranged from 0.09 to 0.77) with the highest values occurring with the Bodily Pain sub-scale (SRM 0.72, ES 0.77) and Physical Component Summary scale (SRM 0.76, ES 0.68). CONCLUSIONS: This study demonstrated increased responsiveness of foot and ankle specific outcomes tools compared to the SF-36. However, the Bodily Pain sub-scale and Physical Component Summary scale of the SF-36 had levels of responsiveness approaching those of the FFI and AOFAS Systems after foot and ankle surgery. This suggests that the SF-36 may be used alone to monitor the outcomes in these patients without sacrificing adequate sensitivity to clinical change.

The Rag proteins carry out V(D)J recombination through a process mechanistically similar to cut-and-paste transposition. Specifically, Rag complexes form DNA hairpins through direct transesterification, using a catalytic Asp-Asp-Glu (DDE) triad in Rag1. How is sufficient DNA distortion introduced to allow hairpin formation? We hypothesized that, like certain transposases, the Rag proteins might use aromatic amino acid residues to stabilize a flipped-out base. Through in vivo and in vitro experiments and structural predictions, we identified residues in Rag1 crucial for hairpin formation. One of these, a conserved tryptophan (Trp893), probably participates in base-stacking interactions near the cleavage site, as do Trp298, Trp265 and Trp319 in the Tn5, Tn10 and Hermes transposases, respectively. Other residues surrounding the catalytic glutamate (YKEFRK) may share functional similarities with the YREK motif in IS4 family transposases

Previous studies have shown that the cerebral complications associated with skin burn victims are correlated with brain damage. The aim of this study was to determine whether systemic thermal injury induces inflammatory responses in the brain. Sprague Dawley rats (n=28) were studied in thermal injury and control groups. Animals from the thermal injury (n=14) and control (n=14) group were anesthetized and submerged to the neck vertically in 85 degrees C water for 6 s producing a third degree burn affecting 60-70% of the animal body surface area. The controls were submerged in 37 degrees C water for 6 s. Early expression of tumor necrosis factor-alpha (TNF-alpha), interleukin 1-beta (IL-1beta), and intracellular cell adhesion molecules (ICAM-1) protein levels in serum were determined at 3 (n=7) and 7 h (n=7) by enzyme-linked immunoabsorbent assay (ELISA). mRNA of TNF-alpha, IL-1beta, and ICAM-1 in the brain was measured at the same time points with a real-time reverse transcriptase-polymerase chain reaction (RT-PCR). An equal animal number was used for controls. Systemic inflammatory responses were demonstrated by dramatic up-regulations (5-50 fold) of TNF-alpha, IL-1beta, and ICAM-1 protein level in serum at 7 h after the thermal injury. However, as early as 3 h after peripheral thermal injury, a significant increase (3-15 fold) in mRNA expression of TNF-alpha, IL-1beta and ICAM-1 was observed in brain homogenates, with increased levels remaining at 7 h after injury. This study demonstrated an early inflammatory response in the brain after severe peripheral thermal injury. The cerebral inflammatory reaction was associated with expression of systemic cytokines and an adhesion molecule

Fat grafting through a blunt cannula has been used by plastic surgeons for altering facial contours for 100 years. Autologous tissue is completely biocompatible and is usually the safest choice for altering facial volume or contours. Fat grafts can be placed in such a fashion that they are long lasting, completely integrated, and natural appearing. Only in the past 20 years have advances in techniques and instrumentation allowed us to obtain predictable results that make fat grafting a viable option for soft tissue augmentation. Our understanding of aging and methods of rejuvenation have developed also. We now approach rejuvenation and adjustment of facial proportion with a better understanding of the need for the restoration or adjustment of facial volume

BACKGROUND: To evaluate the impact of damage control laparotomy on long term morbidity and survival. METHODS: Prospective data were collected on 56 consecutive trauma patients over a 20-month period (May 2000-January 2002). Patients were stratified by mechanism of injury, age, Injury Severity Score, and type of injury, temperature at admission, initial blood transfusion volume and pH. Initial outcome data included major complications, intensive care unit and hospital length of stay, and mortality. Readmission data including number of admissions, surgical procedures, and hospital length of stay were then analyzed over the subsequent follow-up years (2001-2003). RESULTS: The mean age of the study group was 31 +/- 11 years with a mean Injury Severity Score of 33 +/- 13. The majority of the patients were male (73%) with a relatively equal number of blunt (n = 30) and penetrating injuries (n = 26). Liver injuries (34 [61%]) were the most common solid organ injury followed by 22 bowel (39%), 19 spleen (34%), 11 major vessel (20%), and 7 pancreas (13%) injuries. The mean number of initial abdominal surgical procedures was 4.4 +/- 2.2 per patient. The overall mortality during the first admission was 27%. Time spent in the intensive care unit and hospital length of stay was 17 +/- 13 and 30 +/- 19 days, respectively. There were a total of 74 readmissions and 58 subsequent surgical procedures in the 41 patients who were readmitted. Thirty-one (76%) patients were re-admitted at least one time. Infection (n = 19) was the most common reason for readmission followed by ventral hernia repair (n = 17) and fistula management (n = 14). There was 0% mortality for patients who survived the preliminary hospitalization but required readmission. CONCLUSION: Although damage control laparotomy is associated with a significant complication and readmission rate, its long term survival and benefit is indisputable.

BACKGROUND: Reconstruction is an important adjunct to breast cancer management. This study evaluated the frequency of major and minor complications in the largest reported series of consecutive mastectomy patients treated with free tissue transfer for breast reconstruction. METHODS: All patients treated with microvascular breast reconstruction at the University of California, Los Angeles, Medical Center over an 11-year period were identified using a retrospective analysis. Frequency of complications was assessed. RESULTS: A total of 1195 breast reconstructions were performed in 952 patients. Transverse rectus abdominis musculocutaneous flaps were used in most cases (81.8 percent), whereas the superior gluteal musculocutaneous flap (10.1 percent) and other free flaps were used in the remaining patients. The overall complication rate was 27.9 percent and consisted primarily of minor complications (21.7 percent). Major complications were noted in 7.7 percent, including six total flap losses (0.5 percent). Obesity was a major predictor of complications. Smoking was not associated with increased rates of overall or microsurgical complications. Neoadjuvant chemotherapy was also an independent predictor of complications and was associated with wound-healing problems and fat necrosis. Prior abdominal surgery in transverse rectus abdominis musculocutaneous flap patients increased the risk of partial flap loss, fat necrosis, and donor-site complications. CONCLUSIONS: Microsurgical breast reconstruction is a safe and highly effective technique. Complications tend to be minor and do not affect postreconstruction adjuvant therapy. Obesity is a major predictor of flap and donor-site complications, and these patients should be appropriately counseled. Similarly, neoadjuvant preoperative chemotherapy and prior abdominal surgery increase the rates of minor complications.

OBJECTIVE: The purpose of this study was to compare quality of life issues in patients with advanced laryngeal versus oropharyngeal cancer after treatment with chemoradiation. DESIGN: A cohort study of 31 patients with laryngeal or oropharyngeal squamous cell carcinoma treated with chemoradiation completed the University of Washington quality of life instrument version 4 (UW-QOL v4). Statistical analysis was performed with Wilcoxon rank sum and chi-square tests. SETTING: Academic tertiary care center. RESULTS: Both groups reported similar impairment in the domains of swallowing, chewing, and taste. Oropharyngeal cancer patients reported significantly worse quality of life in the domain of saliva (P < 0.007). CONCLUSION: Swallowing, chewing, and taste were adversely affected by chemoradiation for both groups. Oropharyngeal patients experienced significantly worse problems with saliva than laryngeal patients. These patients reported high levels of satisfaction with health-related quality of life issues. SIGNIFICANCE: Specific head and neck subsites have different morbidities when treated with primary chemoradiation for advanced tumors

The goal of this two-part review is to discuss peripheral nerve surgery complications, along with the techniques and principles used to prevent them. In this second article, we concentrate on injuries, tumors, and entrapment of nerves in the extremities, including carpal tunnel syndrome and ulnar nerve compression at the elbow