Appendiceal Neoplasms.

Appendiceal neoplasms are identified in 0.9 to 1.4% of appendiceal specimens, and the incidence is increasing. It has long been professed that neuroendocrine tumors (formerly carcinoids) are the most common neoplastic process of the appendix; recent data, however, has suggested a shift in epidemiology. Our intent is to distill the complex into an algorithm, and, in doing so, enable the surgeon to seamlessly maneuver through operative decisions, treatment strategies, and patient counseling. The algorithm for evaluation and treatment is complex, often starts from the nonspecific presenting complaint of appendicitis, and relies heavily on often subtle histopathologic differences.

Have we progressed in the surgical literature? Thirty-year trends in clinical studies in 3 surgical journals.

BACKGROUND: We practice in an era of evidence-based medicine. In 1993, Solomon and McLeod published an article examining study designs in 3 surgical journals from 1980 and 1990. OBJECTIVE: The purpose of this study was to evaluate subsequent 30-year trends in the quality of selected literature. DESIGN: All of the articles from Diseases of the Colon & Rectum, Surgery, and the British Journal of Surgery during 2000 and 2010 were classified by study design. Nonclinical studies were substratified by animal/laboratory, surgical technique, editorial/review, or miscellaneous articles. Clinical articles were categorized as case or comparative studies, further categorized by study design, and rated on a 10-point scale to determine strength. We compared interobserver reliability using a random sample. SETTING: This study was conducted at 3 North American medical centers. PATIENTS: Patients described in the scope of the literature were included in this study. MAIN OUTCOME MEASURES: Frequency, type, and strength of study design were measured. RESULTS: We evaluated 1911 articles (967 clinical; 17% comparative). There was a significant increase in multicenter clinical studies (from 12% to 27%; p < 0.0001) and mean study population (from 326 to 6775; p < 0.05). Studies using administrative data increased from 14% to 43% (p < 0.0001). Case reports decreased from 16% to 7% of all clinical studies (p < 0.001), whereas the percentage of comparative studies increased from 14% to 21% (p = 0.001). The percentage of randomized controlled trials did not increase significantly (8.5% in 2000; 10.0% in 2010; p = 0.44). The mean 10-point score for comparative studies was 6.7 for both years (p = 0.50). There was good interobserver agreement in the classification of studies (κ = 0.70) and moderate agreement in scoring comparative studies (κ = 0.47). LIMITATIONS: This descriptive study cannot fully account for the reasons behind the identified differences. CONCLUSIONS: Comparative and multicenter studies, mean study population, and the use of administrative data increased from 2000 to 2010. This suggests that increased use of administrative databases has allowed larger populations of patients from more institutions to be studied and may be more generalizable. Researchers should strive toward improving the level of evidence (see Video, Supplemental Digital Content 1, http://links.lww.com/DCR/A167).

Surgical Emergencies in Inflammatory Bowel Disease.

Inflammatory bowel disease (IBD) patients are at risk for undergoing emergency surgery for fulminant disease, toxic megacolon, bowel perforation, intestinal obstruction, or uncontrolled gastrointestinal hemorrhage. Unfortunately, medical advancements have failed to significantly decrease rates of emergency surgery for IBD. It is therefore important for all acute care and colorectal surgeons to understand the unique considerations owed to this often-challenging patient population.

Anal Cryptoglandular Suppuration: Evidence-Based Management.

Anal suppurative processes are commonly encountered in surgical practice. While the initial therapeutic intervention is philosophically straightforward (incision and drainage), drainage of the appropriate space and treatment of the subsequent fistula in ano require a thorough understanding of perianal anatomy and nuanced decision making. Balancing the risk of fecal incontinence with simple fistulotomy versus the higher risk of fistula recurrence with all sphincter-sparing fistula treatments can be a challenge for surgeons and patients alike.

Damage control resuscitation is associated with a reduction in resuscitation volumes and improvement in survival in 390 damage control laparotomy patients.

OBJECTIVE: To determine whether implementation of damage control resuscitation (DCR) in patients undergoing damage control laparotomy (DCL) translates into improved survival. BACKGROUND: DCR aims at preventing coagulopathy through permissive hypotension, limiting crystalloids and delivering higher ratios of plasma and platelets. Previous work has focused only on the impact of delivering higher ratios (1:1:1). METHODS: A retrospective cohort study was performed on all DCL patients admitted between January 2004 and August 2010. Patients were divided into pre-DCR implementation and DCR groups and were excluded if they died before completion of the initial laparotomy. The lethal triad was defined as immediate postoperative temperature less than 95°F, international normalized ratio more than 1.5, or a pH less than 7.30. RESULTS: A total of 390 patients underwent DCL. Of these, 282 were pre-DCR and 108 were DCR. Groups were similar in demographics, injury severity, admission vitals, and laboratory values. DCR patients received less crystalloids (median: 14 L vs 5 L), red blood cells (13 U vs 7 U), plasma (11 U vs 8 U), and platelets (6 U vs 0 U) in 24 hours, all P < 0.05. DCR patients had less evidence of the lethal triad upon intensive care unit arrival (80% vs 46%, P < 0.001). 24-hour and 30-day survival was higher with DCR (88% vs 97%, P = 0.006 and 76% vs 86%, P = 0.03). Multivariate analysis controlling for age, injury severity, and emergency department variables, demonstrated DCR was associated with a significant increase in 30-day survival (OR: 2.5, 95% CI: 1.10-5.58, P = 0.028). CONCLUSION: In patients undergoing DCL, implementation of DCR reduces crystalloid and blood product administration. More importantly, DCR is associated with an improvement in 30-day survival.

Impact of closure at the first take back: complication burden and potential overutilization of damage control laparotomy.

BACKGROUND: Damage control laparotomy (DCL) is a lifesaving technique initially employed to minimize the lethal triad of coagulopathy, hypothermia, and acidosis. Recently, it has been recognized that DCL itself carries significant morbidity and may be overutilized. The purpose of this study was to determine (1) whether early fascial closure is associated with a reduction in postoperative complications and (2) whether patients at our institution met traditional DCL indications (acidosis, hypothermia, and coagulopathy). METHODS: This is a retrospective review of all patients undergoing immediate laparotomy at a Level I trauma center between 2004 and 2008. DCL was defined as temporary abdominal closure at the initial surgery. Early closure was defined as primary fascial closure at initial take back laparotomy. Patients were excluded if they died before first take back. Acidosis (pH <7.30), hypothermia (temperature <95.0°F), and coagulopathy (international normalized ratio >1.5) were measured on intensive care unit (ICU) arrival. RESULTS: Totally, 925 patients were eligible. Thirty percent had DCL employed. Of these, 86 subjects (34%) were closed at first take back while 161 (66%) were not. Both groups were similar in demographics, injury severity score, resuscitation volumes, blood products, and prehospital, emergency department, and operating room vital signs. Univariate analyses noted that intra-abdominal abscesses (8.4% vs. 21.3%), respiratory failure (14.4% vs. 37.1%), sepsis (8.4% vs. 25.1%), and renal failure (3.6% vs. 25.1%) were lower in patients closed at first take back (all <0.05). Controlling for age, gender, injury severity score, and transfusions, logistic regression analysis noted that closure at the first take back was associated with a reduction in infectious (odds ratio, 0.28; 95% confidence interval [CI], 0.12-0.66; p = 0.004) and noninfectious abdominal complications (odds ratio, 0.23; 95% CI, 0.09-0.56; p = 0.001) as well as wound (odds ratio, 0.31; 95% CI, 0.13-0.72; p = 0.007) and pulmonary complications (odds ratio, 0.35; CI, 0.20-0.62; p < 0.001). Of patients closed at the initial take back, 78% were acidotic (35%), coagulopathic (49%), or hypothermic (44%) on initial ICU admission. CONCLUSION: Early fascial closure is an independent predictor of reduced complications in DCL patients. One in five patients closed at initial take back did not meet any of the traditional indications for DCL upon initial ICU admission. This may represent an overutilization of this valuable technique, exposing patients to increased complications. Further efforts should be directed at achieving both early facial closure as well as redefining the appropriate indications for DCL.

Rapid thrombelastography delivers real-time results that predict transfusion within 1 hour of admission.

BACKGROUND: Recognition of trauma-induced coagulopathy by conventional coagulation testing (CCT) is limited by their slow results, incomplete characterization, and their poor predictive nature. Rapid thrombelastography (r-TEG) delivers a more comprehensive assessment of the coagulation system but has not been prospectively validated in trauma patients. The purpose of this pilot study was to evaluate the timeliness of r-TEG results, their correlation with CCTs, and the ability of r-TEG to predict early blood transfusion. METHODS: Over a 5-month period, 583 consecutive major trauma activations were prospectively entered into a database, of which 272 met entry criteria. r-TEG and CCTs (prothrombin time, international normalized ratio, partial thromboplastin time, and platelet count) were obtained on all patients. Graphical results for r-TEG were displayed "real time" in the trauma bay. Spearman's correlation and regression models were used to compare r-TEG and CCTs. RESULTS: Early r-TEG values (activated clotting time [ACT], k-time, and r-value) were available within 5 minutes, late r-TEG values (maximal amplitude and α-angle) within 15 minutes, and CCTs within 48 minutes (p < 0.001). ACT, r-value, and k-time showed strong correlation with prothrombin time, international normalized ratio, and partial thromboplastin time (all r >0.70; p < 0.001), whereas maximal amplitude (r = -0.49) and α-angle (r = 0.40) correlated with platelet count (both p < 0.001). Linear regression demonstrated ACT predicted red blood cells (coef. 0.05; 95% confidence interval [CI], 0.04-0.06; p < 0.001), plasma (coef. 0.03; 95% CI, 0.02-0.04; p < 0.001), and platelet (coef. 0.06; 95% CI, 0.04-0.07; p < 0.001) transfusions within the first 2 hours of arrival. Controlling for all demographics and Emergency Department vitals, ACT >128 predicted massive transfusion (≥10 U) in the first 6 hours (odds ratio, 5.15; 95% CI, 1.36-19.49; p = 0.01). In addition, ACT <105 predicted patients who did not receive any transfusions in the first 24 hours (odds ratio, 2.80; CI, 1.02-7.07; p = 0.04). CONCLUSIONS: Graphical r-TEG results are available within minutes, correlate with conventional coagulation test that are not as rapidly available, and are predictive of early transfusions of packed red blood cells, plasma, and platelets.

Current use of damage-control laparotomy, closure rates, and predictors of early fascial closure at the first take-back.

BACKGROUND: Damage-control laparotomy (DCL) is a lifesaving technique but carries significant morbidity. If DCL is over used and the factors that predict early fascial closure have not been fully evaluated. The purpose of the current study was to determine (1) the current rate of DCL, (2) the percentage of DCLs that are closed at first take-back, and (3) possible physiologic and resuscitative parameters predicting early fascial closure. METHODS: A retrospective review of all trauma laparotomies from a Level I trauma center between January 2004 and December 2008 was performed. Patients were excluded if they died before first take-back. Univariate and multivariate analyses were performed. RESULTS: Nine hundred thirty patients were eligible, 278 (30%) underwent DCL, 36 excluded for death before first take-back. Of the remaining 242 DCL patients, 83 (34%) were closed at first take-back and 159 (66%) were not closed at first take-back. These two groups were similar in injury severity, demographics, and prehospital and emergency department fluids and vitals. Median emergency department international normalized ratio (INR; 1.13 vs. 1.29, p = 0.010), post-op INR (1.4 vs. 1.5, p = 0.028), 24-hour fluids (11.9 L vs. 15.5 L, p = 0.006), peak post-op intra-abdominal pressure (IAP; 15 vs. 18, p < 0.001), and mortality (1.2% vs. 8.2%, p = 0.027) were different between groups. Multivariate analysis noted vacuum-assisted closure at initial laparotomy (Odds ratio, 3.1; 95% confidence interval [CI], 1.42-6.63; p = 0.004) was an independent predictor of closure at first take-back. However, post-op INR (Odds ratio, 0.18; 95% CI, 0.03-0.97; p = 0.04) and post-op peak IAP (Odds ratio, 0.85; 95% CI, 0.76-0.95; p = 0.005) predicted failure to close fascia at first take-back. CONCLUSION: In similarly injured DCL patients, increased post-op INR and IAP predicted inability to achieve primary fascial closure on first take-back, while use of the vacuum-assisted closure was associated with increased likelihood of early fascial closure. At a busy academic Level I trauma center, the current rate of DCL among those undergoing emergent laparotomy is 30%. Whether this represents optimal use or overutilization of this technique still needs to be determined.

Right-Sided Diverticulitis Requiring Colectomy: an Evolving Demographic? A Review of Surgical Outcomes from the National Inpatient Sample Database.

INTRODUCTION: There remains a paucity of recent data on right-sided colonic diverticulitis, especially those undergoing colectomy. We sought to describe the clinical features of patients undergoing both a laparoscopic and open surgery for right-sided diverticulitis. METHODS: This study is a review of all cases of a right colectomy or ileocecectomy for diverticulitis from the National Inpatient Sample (NIS) from 2006 to 2012. Demographics, comorbidities, and postoperative outcomes were identified for all cases. A comparative analysis of a laparoscopic versus open approach was performed. RESULTS: We identified 2233 admissions (laparoscopic = 592; open = 1641) in the NIS database. The majority of cases were Caucasian (67 %), with 6 % of NIS cases identified as Asian/Pacific Islander. The overall morbidity and in-hospital mortality rates were 24 and 2.7 %, respectively. The conversion rate from a laparoscopic to open procedure was 34 %. Postoperative complications were greater in the open versus laparoscopic cohorts (25 vs. 19 %, p < 0.01), with pulmonary complications as the highest (7.0 vs. 1.7 %; p < 0.01). CONCLUSION: This investigation represents one of the largest cohorts of colon resections to treat right-sided diverticulitis in the USA. In this series, right-sided diverticulitis undergoing surgery occurred most commonly in the Caucasian population and is most often approached via an open surgical technique; however, laparoscopy is a safe and feasible option.

Is Modern Medical Management Changing Ultimate Patient Outcomes in Inflammatory Bowel Disease?

BACKGROUND: The impact of modern medical management of inflammatory bowel disease (IBD) on surgical necessity and outcomes remains unclear. We hypothesized that surgery rates have decreased while outcomes have worsened due to operating on "sicker" patients since the introduction of biologic medications. METHODS: The Nationwide Inpatient Sample and ICD-9-CM codes were used to identify inpatient admissions for Crohn's disease and ulcerative colitis. Trends in IBD nutrition, surgeries, and postoperative complications were determined. RESULTS: There were 191,743 admissions for IBD during the study period. Surgery rates were largely unchanged over the study period, ranging from 9 to 12 % of admissions in both Crohn's disease and ulcerative colitis. The rate of poor nutrition increased by 67 % in ulcerative colitis and by 83 % in Crohn's disease. Rates of postoperative anastomotic leak (10.2-13.9 %) were unchanged over the years. Postoperative infection rates decreased by 17 % in Crohn's disease (18 % in 2003 to 15 % in 2012; P < 0.001) but did not show a trend in any direction in ulcerative colitis. CONCLUSIONS: Rates of IBD surgery have remained stable while postoperative infectious complications have remained stable or decreased since the implementation of biologic therapies. We identified an increase in poor nutrition in surgical patients.

Screening or Symptoms? How Do We Detect Colorectal Cancer in an Equal Access Health Care System?

BACKGROUND: Detection of colorectal cancer ideally occurs at an early stage through proper screening. We sought to establish methods by which colorectal cancers are diagnosed within an equal access military health care population and evaluate the correlation between TNM stage at colorectal cancer diagnosis and diagnostic modality (i.e., symptomatic detection vs screen detection). MATERIALS AND METHODS: A retrospective chart review of all newly diagnosed colorectal cancer patients from January 2007 to August 2014 was conducted at the authors' equal access military institution. We evaluated TNM stage relative to diagnosis by screen detection (fecal occult blood test, flexible sigmoidoscopy, CT colonography, colonoscopy) or symptomatic evaluation (diagnostic colonoscopy or surgery). RESULTS: Of 197 colorectal cancers diagnosed (59 % male; mean age 62 years), 50 (25 %) had stage I, 47 (24 %) had stage II, 70 (36 %) had stage III, and 30 (15 %) had stage IV disease. Twenty-five percent of colorectal cancers were detected via screen detection (3 % by fecal occult blood testing (FOBT), 0.5 % by screening CT colonography, 17 % by screening colonoscopy, and 5 % by surveillance colonoscopy). One hundred forty-eight (75 %) were diagnosed after onset of signs or symptoms. The preponderance of these was advanced-stage disease (stages III-IV), although >50 % of stage I-II disease also had signs or symptoms at diagnosis. The most common symptoms were rectal bleeding (45 %), abdominal pain (35 %), and change in stool caliber (27 %). The most common overall sign was anemia (60 %). Screening FOBT (odds ratio (OR) 8.7, 95 % confidence interval (CI) 1.0-78.3; P = 0.05) independently predicted early diagnosis with stage I-II disease. Patient gender and ethnicity were not associated with cancer stage at diagnosis. CONCLUSIONS: Despite equal access to colorectal cancer screening, diagnosis after development of symptomatic cancer remains more common. Fecal occult blood screen detection is associated with early stage at colorectal cancer diagnosis and is the focus for future initiatives.

Mechanistic determinates of the acute coagulopathy of trauma (ACoT) in patients requiring emergency surgery.

INTRODUCTION: The development of acute coagulopathy of trauma (ACoT) is associated with a significant increase in mortality. However, the contributory mechanisms behind ACoT have yet to be clearly defined. The purpose of this study was to evaluate the influence of multiple variables, including base deficit and injury severity, on development of ACoT within a subset of critically ill trauma patients. METHODS: A retrospective review of all trauma laparotomies between 01/2004-12/2009 was performed. ACoT (+) was defined as an arrival INR ≥1.5, ACoT (-) defined as INR<1.5. Univariate and multivariate analyses were performed. RESULTS: Of 1218 patients, 337 (27%) were ACoT (+) and 881 (73%) were ACoT (-) upon presentation. Groups were similar in demographics, ED fluid administration, GCS scores, and admission temperatures. Admission base deficit (8.5 vs. 4, p<0.001) and ISS (median 25 vs. 16, p<0.001) were higher in the ACoT (+) group, as were intra-operative RBC (median 4 vs. 0 U) and plasma (3 vs. 0 U) transfusions; both p<0.001. Multiple-linear regression revealed INR values were independently associated with arrival base deficit and pre-hospital fluid volumes (both p<0.001). On logistic regression, the development of ACoT (+) was associated with base deficit (OR 0.92, p=0.013) as well as ISS (OR 1.05, p<0.001). However, blunt mechanism alone was not an independent predictor of ACoT. CONCLUSION: The current study revealed that ACoT is independently associated with both shock (base deficit) and tissue injury. Additionally, tissue injury is a significant contributor to the development of early ACoT regardless of blunt or penetrating mechanism.