Allison Sabel

Impact of Routine Infectious Diseases Service Consultation on the Evaluation, Management, and Outcomes of Staphylococcus aureus Bacteremia

To the Editor—Jenkins et al. [1] analyzed the role of routine infectious diseases consultation on Staphylococcus aureus bacteremia. The study did not show, however, a statistical difference in terms of treatment failure (such as bacteremia recurrence or death) between the group of patients who received routine infectious diseases consultation and the group of patients who did not receive it. With a clinically and statistically significant difference in median duration of therapy between 2 groups (29 vs. 16 days), it may be possible to argue that the infectious diseases consultation may be simply increasing the duration of therapy but not improving the outcome of patients. We do not consider that this is the case, however. The investigators reviewed cases for up to 12 weeks by protocol and actually followed-up patients for a median of ∼60 days for both groups. However, late recurrence of S. aureus infection is common, and it may have been missed in the study. A different study showed a recurrence rate of 12.3% for S. aureus bacteremia [2]. Another study reviewed 10 cases of genetically confirmed, recurrent S. aureus bacteremia, and 5 of these cases involved recurrence after an interval 160 days (range, 68 days–9 months) [3]. We think that it is too early to conclude that infectious diseases consultation does not have an impact on the clinical outcome of S. aureus bacteremia. An evaluation for a longer period of time will provide more insight into this issue.

Rapid thrombelastography (r-TEG) identifies hypercoagulability and predicts thromboembolic events in surgical patients.

BACKGROUND Despite routine prophylaxis, thromboembolic events (TEs) in surgical patients remain a substantial problem. Furthermore, the timing and incidence of hypercoagulability, which predisposes to these events is unknown, with institutional screening programs serving primarily to establish a diagnosis after an event has occurred. Emerging evidence suggests that point of care (POC) rapid thrombelastography (r-TEG) provides a real-time analysis of comprehensive thrombostatic function, which represents an analysis of both enzymatic and platelet components of thrombus formation. We hypothesized that r-TEG can be used as a screening tool to identify hypercoagulable states in surgical patients and would predict subsequent thromboembolic events. METHODS Rapid thrombelastography r-TEG analyses were performed on 152 critically ill patients in the surgical intensive care unit (ICU) during 7 months. Hypercoagulability was defined as clot strength (G)>12.4 dynes/cm(2). Variables of interest for identifying hypercoagulability and thromboembolic events included sex, age, operating hospital service, specific injury patterns, injury severity score (ISS), transfusion within first 24 h, ICU duration of stay, ventilator days, hospital admission days, and thromboprophylaxis. Comparisons between the hypercoagulable and normal groups or between the groups with and without thromboembolic events were performed using Chi-square tests or the Fisher exact test for categorical variables and independent sample t tests or Wilcoxon rank sum tests for continuous variables. Multivariate logistic regression analysis (LR) was performed to identify independent predictors of thromboembolic events. A receiver operating characteristic curve was used to measure the performance of G for predicting the occurrence of a TE event. All tests were 2-sided with significance of P < .05. RESULTS In all, 86 patients (67%) were hypercoagulable by r-TEG. More than 85% of patients in the hypercoagulable group and 79% in the normal group received thromboprophylaxis during the study period. The differences between hypercoagulable and normal groups by bivariate analysis included high-risk injuries (52% vs 35%; P = .03), spinal cord injury (27% vs 12%; P = .03), median ICU duration of stay (13 vs 7 days; P < .001), median ventilator days (6 vs 2; P < .001), and median hospital duration of stay (20 vs 13 days; P < .001). A total of 16 patients (19%) of the hypercoagulable group suffered a thromboembolic event, and 10 hypercoagulable patients (12%) had thromboembolic events predicted by prior r-TEG hypercoagulability. No patients with normal coagulability by r-TEG had an event (P < .001). LR analysis showed that the strongest predictor of TE after controlling for the presence of thromboprophylaxis was elevated G value (odds ratio: 1.25, 95% confidence interval [CI]: 1.12-1.39). For every 1 dyne/cm(2) increase in G, the odds of a TE increased by 25%. CONCLUSION These results indicate that the presence of hypercoagulability identified by r-TEG is predictive of thromboembolic events in surgical patients. Subsequent study is necessary to define optimal prophylactic treatment strategies for patients with r-TEG proven hypercoagulability.

Emergence of Fluoroquinolone Resistance in Outpatient Urinary Escherichia coli Isolates

BACKGROUND Because of high rates of trimethoprim-sulfamethoxazole resistance in Escherichia coli, Denver Health switched to levofloxacin as the initial therapy for urinary tract infections (UTIs) in 1999. We evaluated the effects of that switch 6 years later. METHODS Levofloxacin prescriptions per 1000 outpatient visits and levofloxacin resistance in outpatient E. coli were evaluated over time. E. coli isolated in 2005 were further characterized by specimen source and antimicrobial susceptibilities. Risk factors for levofloxacin-resistant E. coli UTI among nonpregnant adult outpatients were evaluated in a case-control study. RESULTS Between 1998 and 2005, levofloxacin use increased from 3.1 to 12.7 prescriptions per 1000 visits (P<.01) and resistance in outpatients increased from 1% to 9% (P<.01). Although prescriptions for sulfonamide antibiotics decreased by half during the same period, E. coli resistance to trimethoprim-sulfamethoxazole increased from 26.1% to 29.6%. Levofloxacin-resistant E. coli were more likely resistant to other antibiotics than levofloxacin-susceptible isolates (90% vs 43%, P<.0001). Risk factors for levofloxacin-resistant E. coli UTI were hospitalization (odds ratio for each week of hospitalization, 2.0; 95% confidence interval, 1.0-3.9) and use of levofloxacin (odds ratio, 5.6; 95% confidence interval, 2.1-27.5) within the previous year. CONCLUSION Fluoroquinolone prescriptions increased markedly after an institutional policy change for empiric treatment of UTI, and a rapid increase in fluoroquinolone resistance among outpatient E. coli followed. Risk factors for infection with resistant E. coli were recent hospitalization and levofloxacin use. Risk factors should be considered before initiating empiric treatment with a fluoroquinolone.

Skin and Soft-Tissue Infections Requiring Hospitalization at an Academic Medical Center: Opportunities for Antimicrobial Stewardship

BACKGROUND Although complicated skin and soft-tissue infections (SSTIs) are among the most common infections requiring hospitalization, their clinical spectrum, management, and outcomes have not been well described. METHODS We report a cohort of consecutive adult patients hospitalized for SSTI from 1 January through 31 December 2007 at an academic medical center. Cases meeting inclusion criteria were reviewed and classified as cellulitis, cutaneous abscess, or SSTI with additional complicating factors. RESULTS In total, 322 patients were included; 66 (20%) had cellulitis, 103 (32%) had cutaneous abscess, and 153 (48%) had SSTI with additional complicating factors. Injection drug use, diabetes mellitus, and alcohol abuse were common comorbidities. Serum inflammatory markers were routinely measured and blood cultures and imaging studies were routinely performed in each group. Of 150 patients with a positive culture result for an abscess, deep tissue, or blood, Staphylococcus aureus or streptococci were identified in 145 (97%). Use of antibiotics with broad aerobic gram-negative activity (61%-80% of patients) or anaerobic activity (73%-83% of patients) was frequent in each group. The median duration of therapy for cellulitis, cutaneous abscess, and SSTI with additional complicating factors was 13 (interquartile range [IQR], 10-14), 13 (IQR, 10-16), and 14 (IQR, 11-17) days, respectively. Treatment failure, recurrence, or rehospitalization due to SSTI within 30 days occurred in 12.1%, 4.9%, and 9.2% of patients, respectively. CONCLUSIONS Hospitalizations for SSTI were common; more than half were due to cellulitis or cutaneous abscess. Frequent use of potentially unnecessary diagnostic studies, broad-spectrum antibiotic therapy, and prolonged treatment courses in these patients suggest targets for antimicrobial stewardship programs.

Validation of the Mortality in Emergency Department Sepsis (MEDS) score in patients with the systemic inflammatory response syndrome (SIRS)

Objective: To prospectively and externally validate the Mortality in Emergency Department Sepsis (MEDS) score as a predictor of 28-day mortality in patients who present to the emergency department with a systemic inflammatory response syndrome. Design: Multicentered prospective cohort study. Setting: Emergency departments at the University of Colorado Hospital and Denver Health Medical Center in Denver, CO, and Albert Einstein Medical Center and the Hospital of the University of Pennsylvania in Philadelphia, PA. Subjects: Adult patients who presented to the emergency department, who met criteria for systemic inflammatory response syndrome, and who were admitted to the hospital. Measurements: The MEDS score was calculated by recording the presence of terminal illness, tachypnea or hypoxemia, septic shock, platelet count <150,000 cells/mm3, band count as a percentage of total white blood cell count >5%, age >65 yrs, lower respiratory infection, nursing home residence, and altered mental status. Outcome: Mortality within 28 days or discharged alive from the hospital. Results: In all, 385 patients were enrolled between 18 and 100 yrs of age. The overall mortality was 9%. As in the original article, the MEDS score was categorized into five groups: very low, low, moderate, high, and very high for 28-day mortality. Mortality rates for each group were 0.6% (95% confidence interval [CI], 0%–3%), 5% (95% CI, 1%-13%), 19% (95% CI, 11%-29%), 32% (95% CI, 15%-54%), and 40% (95% CI, 12%-74%), respectively. The MEDS score had an area under the receiver operating characteristic curve of 0.88 (95% CI, 0.83-0.92). Conclusions: The MEDS score accurately predicts 28-day mortality in patients who present to the emergency department with systemic inflammatory response syndrome and who are admitted to the hospital.

Noncitrated Whole Blood Is Optimal for Evaluation of Postinjury Coagulopathy With Point-of-Care Rapid Thrombelastography

INTRODUCTION Progressive postinjury coagulopathy has become the fundamental rationale for damage control surgery, and the decision to abort operative intervention must occur prior to overt laboratory confirmation of coagulopathy. Current coagulation testing is most commonly performed for monitoring anticoagulation therapy, the results are delayed, and the applicability of these tests in the trauma setting is questionable. Point-of-care (POC) rapid thrombelastography (r-TEG) provides real time analysis of thrombostatic function, which may allow for accurate, goal directed therapy. The test differs from standard thrombelastography (TEG) because the clotting process and subsequent analysis is accelerated by the addition of tissue factor to the whole blood sample, but is limited by the requirement that the analysis be performed within 4 min of blood draw to prevent clot formation. Consequently, citrated specimens have been proposed to obviate this time limitation. We hypothesized that the speed of r-TEG analysis following tissue factor addition to citrated blood might compromise accurate determinations compared with noncitrated whole blood. Additionally, we sought to compare the use of r-TEG with conventional coagulation tests in analysis of postinjury coagulopathy. METHODS We conducted a retrospective study of severely injured patients entered into our trauma database between January and June 2008 who were at risk for postinjury coagulopathy. Patients needed simultaneous conventional coagulation (INR, fibrinogen, platelet count) and r-TEG specimens with either fresh or citrated whole blood for inclusion in the study. kappa-Statistics were used to determine the agreement between the tests in predicting hypocoagulability. McNemars chi(2) tests were used to compare theoretical blood product administration between r-TEG and conventional coagulation tests for noncitrated specimens. Therapeutic transfusion triggers were: INR (>1.5) and r-TEG ACT (>125 s) for FFP administration; fibrinogen (<133 mg/dL) and alpha-angle (<63 degrees ) for cryoprecipitate; and platelet count (<100K) and maximum amplitude (MA) (<52 mm) for aphaeresis platelets. Statistical significance was established as P<0.05 using two-sided tests. RESULTS Forty-four patients met the inclusion criteria. kappa-Values (correlation) were higher in noncitrated versus citrated specimens for all comparisons between conventional and r-TEG tests, indicating better performance of r-TEG with the noncitrated specimens. FFP would have been administered to significantly more patients based on conventional transfusion triggers (61.5% by INR transfusion triggers versus 26.9% by r-TEG-ACT triggers, P=0.003). There was no statistically significant difference in potential cryoprecipitate or aphaeresis platelet administration. CONCLUSION POC r-TEG is superior when performed with uncitrated versus citrated whole blood for evaluation of postinjury coagulation status. As a real time measure of total thrombostatic function, our preliminary data suggest that r-TEG may effectively guide transfusion therapy and result in reduced FFP administration compared with conventional coagulation tests.

Clinical Triggers: An Alternative to a Rapid Response Team

DHMCs clinical triggers program is a promising approach that addresses an unmet patient need. We have seen dramatic reductions in our non-ICU cardiopulmonary arrest rates, along with our ICU bounceback rates. In the context of our hospital, this program aligns well with our teaching mission while maximizing the resources that are currently available. RRTs are certainly one way to prevent the unnoticed deterioration of patients, but programs such as ours, which focus on prevention of ongoing deterioration, may yield more benefit for the patients in institutions similar to DHMC. Although our study does not alter the weight of evidence in the literature, it does offer a new focus on the afferent limb by clarifying the expectations of the primary responders. This was the essence of the deficiency in the aforementioned case study. Death is the natural, albeit sad, endpoint of all lives; the overarching goal of DHMCs clinical triggers system is to prevent the premature death of a hospitalized patient and thereby improve patient safety.

Use and diversion of medical marijuana among adults admitted to inpatient psychiatry

Abstract Background: Marijuana use is associated with anxiety, depressive, psychotic, neurocognitive, and substance use disorders. Many US states are legalizing marijuana for medical uses. Objective: To determine the prevalence of medical marijuana use and diversion among psychiatric inpatients in Colorado. Methods: Some 623 participants (54.6% male) responded to an anonymous 15-item discharge survey that assessed age, gender, marijuana use, possession of a medical marijuana card, diversion of medical marijuana, perceived substance use problems, and effects of marijuana use. Univariate statistics were used to characterize participants and their responses. Chi-square tests assessed factors associated with medical marijuana registration. Results: Of the total number of respondents, 282 (47.6%) reported using marijuana in the last 12 months and 60 (15.1%) reported having a marijuana card. In comparison to survey respondents who denied having a medical marijuana card, those respondents with a medical marijuana card were more likely to have initiated use before the age of 25, to be male, to have used marijuana in the last 12 months, and to have used at least 20 days in the past month. 133 (24.1%) respondents reported that someone with a medical marijuana card had shared or sold medical marijuana to them; 24 (41.4%) of respondents with a medical marijuana card reported ever having shared or sold their medical marijuana. Conclusion: Medical marijuana use is much more prevalent among adults hospitalized with a psychiatric emergency than in the general population; diversion is common. Further studies which correlate amount, dose, duration, and strain of use with particular psychiatric disorders are needed.

ACUTE center for eating disorders

BACKGROUND While patients with anorexia nervosa have a high mortality rate, more are living into adulthood. Patients with severe malnutrition secondary to anorexia nervosa often require hospitalization for medical stabilization prior to treatment in eating disorders programs. METHODS We developed the ACUTE Center at Denver Health Medical Center to medically stabilize adults with the medical complications of severe malnutrition due to an eating disorder. The first 2 years of patient characteristics and outcomes are reported. RESULTS From October 2008 through December 2010, the ACUTE unit had 76 admissions of which 62 were for medical stabilization, comprising 54 patients. Eighty-nine percent of patients were female. The mean age was 27 years old (range 17-65). The mean body mass index on admission was 12.9 kg/m(2) (standard deviation [SD] 2.0). At admission, patients were hyponatremic, anemic, and leukopenic, with low bone density, but had normal albumin levels. The mean body mass index on discharge was 13.1 ± 1.9 kg/m(2). Median length of stay was 16 days (interquartile range [IQR] 9-29 days). Eighteen percent were discharged to home and eighty-two percent were discharged to inpatient psychiatric eating disorder units. Inpatient mortality was zero. DISCUSSION Patients with this degree of severe malnutrition due to eating disorders are medically complex and relatively uncommon. Regionalized subspecialty centers of excellence, in which a multidisciplinary team is led by practitioners of hospital medicine who have developed expertise in a rare condition, may improve clinical outcomes, optimize healthcare resources, and provide unique professional and academic opportunities for the clinicians involved.

The role of bone allografts in the treatment of angular malunions of the distal radius.

PURPOSE Two cohorts of patients who had corrective osteotomies and volar platings for malunited fractures of the distal radius were compared retrospectively to determine whether the time to union and the outcome were affected by bone allograft. METHODS Patients in the first group (n = 14) did not receive any bone graft; patients in the second group (n = 14) had allograft bone chips following volar plating. Indications for surgery, surgical technique, and postoperative rehabilitation were the same in both groups. Volar cortical contact was maintained using a volar locking plate in all patients. Radiographic parameters of deformity correction, time to union, wrist and forearm range of motion, grip strength, patient-rated wrist evaluation and Disabilities of the Arm, Shoulder, and Hand questionnaire were used to evaluate the outcome before and after the surgery. Average follow-up time was 36 weeks. Patients who had diabetes, who smoked, who had a body mass index of more than 35, and who required lengthening for deformity correction were excluded from the study. RESULTS Osteotomies in both groups healed without loss of surgical correction. Final outcome and time to union revealed no significant differences, clinically or statistically, between the 2 groups. The Disabilities of the Arm, Shoulder, and Hand score was improved in both groups. CONCLUSIONS When volar cortical contact was maintained using a volar locked plate, bone allograft at the osteotomy site did not improve the final outcome. TYPE OF STUDY/LEVEL OF EVIDENCE Therapeutic III.