Construction of a nurse shark (Ginglymostoma cirratum) bacterial artificial chromosome (BAC) library and a preliminary genome survey

BACKGROUND: Sharks are members of the taxonomic class Chondrichthyes, the oldest living jawed vertebrates. Genomic studies of this group, in comparison to representative species in other vertebrate taxa, will allow us to theorize about the fundamental genetic, developmental, and functional characteristics in the common ancestor of all jawed vertebrates. AIMS: In order to obtain mapping and sequencing data for comparative genomics, we constructed a bacterial artificial chromosome (BAC) library for the nurse shark, Ginglymostoma cirratum. RESULTS: The BAC library consists of 313,344 clones with an average insert size of 144 kb, covering ~4.5 × 10(10 )bp and thus providing an 11-fold coverage of the haploid genome. BAC end sequence analyses revealed, in addition to LINEs and SINEs commonly found in other animal and plant genomes, two new groups of nurse shark-specific repetitive elements, NSRE1 and NSRE2 that seem to be major components of the nurse shark genome. Screening the library with single-copy or multi-copy gene probes showed 6–28 primary positive clones per probe of which 50–90% were true positives, demonstrating that the BAC library is representative of the different regions of the nurse shark genome. Furthermore, some BAC clones contained multiple genes, making physical mapping feasible. CONCLUSION: We have constructed a deep-coverage, high-quality, large insert, and publicly available BAC library for a cartilaginous fish. It will be very useful to the scientific community interested in shark genomic structure, comparative genomics, and functional studies. We found two new groups of repetitive elements specific to the nurse shark genome, which may contribute to the architecture and evolution of the nurse shark genome

Implementation of an enhanced recovery protocol in gynecologic oncology.

Enhanced Recovery after Surgery (ERAS) is an evidence-based approach that aims to reduce narcotic use and maintain anabolic balance to enable full functional recovery. Our primary aim was to determine the effect of ERAS on narcotic usage among patients who underwent exploratory laparotomy by gynecologic oncologists. We characterized its effect on length of stay, intraoperative blood transfusions, bowel function, 30-day readmissions, and postoperative complications. A retrospective cohort study was performed at Abington Hospital-Jefferson Health in gynecologic oncology. Women who underwent an exploratory laparotomy from 2011 to 2016 for both benign and malignant etiologies were included before and after implementation of our ERAS protocol. Patients who underwent a bowel resection were excluded. A total of 724 patients were included: 360 in the non-ERAS and 364 in the ERAS cohort. An overall reduction in narcotic usage, measured as oral morphine milliequivalents (MMEs) was observed in the ERAS relative to the non-ERAS group, during the entire hospital stay (MME 34 versus 68, p \u3c 0.001 and within 72 h postoperatively (MME 34 versus 60, p \u3c 0.005). A shorter length of stay and earlier return of bowel function were also observed in the ERAS group. No differences in 30-day readmissions (p = 0.967) or postoperative complications (p = 0.328) were observed. This study demonstrated the benefits of ERAS in Gynecologic Oncology. A significant reduction of postoperative narcotic use, earlier return of bowel function and a shorter postoperative hospital stay was seen in the ERAS compared to traditional perioperative care

Predicting risk of death in general surgery patients on the basis of preoperative variables using American College of Surgeons National Surgical Quality Improvement Program data.

OBJECTIVES: To use the American College of Surgeons (ACS) National Surgical Quality Improvement Program (NSQIP) database to develop an accurate and clinically meaningful preoperative mortality predictor (PMP) for general surgery on the basis of objective information easily obtainable at the patient\u27s bedside and to compare it with the preexisting NSQIP mortality predictor (NMP). METHODS: Data were obtained from the ACS NSQIP Participant Use Data File (2005 to 2008) for current procedural terminology codes that included open pancreas surgery and open/laparoscopic colorectal, hernia (ventral, umbilical, or inguinal), and gallbladder surgery. Chi-square analysis was conducted to determine which preoperative variables were significantly associated with death. Logistic regression followed by frequency analysis was conducted to assign weight to these variables. PMP score was calculated by adding the scores for contributing variables and was applied to 2009 data for validation. The accuracy of PMP score was tested with correlation, logistic regression, and receiver operating characteristic analysis. RESULTS: PMP score was based on 16 variables that were statistically reliable in distinguishing between surviving and dead patients (p \u3c 0.05). Statistically significant variables predicting death were inpatient status, sepsis, poor functional status, do-not-resuscitate directive, disseminated cancer, age, comorbidities (cardiac, renal, pulmonary, liver, and coagulopathy), steroid use, and weight loss. The model correctly classified 98.6% of patients as surviving or dead (p \u3c 0.05). Spearman correlation of the NMP and PMP was 86.9%. CONCLUSION: PMP score is an accurate and simple tool for predicting operative survival or death using only preoperative variables that are readily available at the bedside. This can serve as a performance assessment tool between hospitals and individual surgeons

Cost analysis of laparoscopic versus open colectomy in patients with colon cancer: results from a large nationwide population database.

Laparoscopic colectomy (LC) is a safe and reliable option for patients with colon cancer. This study examined factors associated with LC use and cost differences between LC and open colectomy (OC). Using the Cost & Utilization Project National Inpatient Sample database (2008), patients with colon cancer undergoing elective LC or OC were selected. Chi square and Mann-Whitney tests were used to assess differences between LC and OC. Logistic and multiple regression analysis was used to determine variables associated with LC and predictors of cost. All analysis was weighted. A total of 63,950 patients were identified (LC 8.1%, OC 91.9%). The majority was female (52.7%), white (61.4%), using Medicare (61.1%), and had surgery performed at a large (64.2%), nonteaching (56.9%), urban (87.3%) hospital in the South (37.7%). Mean age was 70 years. On unadjusted analysis, LC was associated with a lower mortality rate (1.7 vs 2.4%), fewer complications (18.9 vs 27.1%), shorter length of stay (5 vs 7 days), and lower total charges ($41,971 vs$43,459, all P \u3c 0.001). LC is a less expensive but less popular surgical option for colon cancer. Stage, race, Charlson score, teaching status, location, and hospital size influence the use of a laparoscopic approach. LC is associated with fewer complications and decreased mortality which contribute to its lower cost as compared with OC

Application of a tertiary referral scoring system to predict nonreversal of Hartmann\u27s procedure for diverticulitis in a community hospital.

Riansuwan et al. at Cleveland Clinic developed a scoring system to quantify the risk of Hartmann\u27s nonreversal based on age, preoperative transfusion, pulmonary comorbidity, American Society of Anesthesiologists score, perforation, and anticoagulation. Our study validates the scoring system in a community hospital setting. Patients undergoing Hartmann\u27s procedure for diverticulitis (2006 to June 2009) were identified from our hospital\u27s database. Two groups were formed based on Hartmann\u27s reversal within 1 year and those with nonreversal. An independent-sample t test and logistic regression using score and nine other variables as predictors of Hartmann\u27s nonreversal were run. Sixty-three of 93 patients (67.7%) had a Hartmann\u27s reversal. Higher scores and higher mean age were seen in the nonreversal group (15.5 ± 3.0 vs 12.1 ± 2.5 and 73 ± 15 vs 63 ± 14 years, respectively). Patients with scores 18 or above were not reversed; 43 of 49 patients (88%) with scores of 13 or less were reversed. Logistic regression confirmed that the only predictive variable for nonreversal is a higher score. The scoring system is predictive of nonreversibility of Hartmann\u27s procedure for acute diverticulitis. This will be useful in allowing surgeons to strategize accurately and to counsel patients realistically. Higher scores may allow both the surgeon and patient to have a low threshold for exploring alternatives to Hartmann\u27s procedure