In the Literature

The Hospitalist. 2010 August;2010(08):

August 1, 2010 | The Hospitalist

Dimitriy Levin, MD ; Jeffrey Carter, MD ; Erin Egan, MD, JD ; Jonathan Pell, MD ; Laura Rosenthal, MSN, ACNP,nichole Zehnder, MD

Patient factors associated with comanagement include advanced age, emergency admissions, and increasing comorbidities. Teaching hospitals had less comanagement, while midsize, nonteaching, and for-profit hospitals had more comanagement.

Bottom line: Comanagement of surgical patients by medicine physicians is a common and growing clinical relationship. Hospitalists are responsible for increasing numbers of comanaged surgical patients.

Citation: Sharma G, Kuo YF, Freeman J, Zhang DD, Goodwin JS. Comanagement of hospitalized surgical patients by medicine physicians in the United States. Arch Intern Med. 2010;170(4):363-368.

Probiotics Might Decrease Risk of Ventilator-Associated Pneumonia

Clinical question: Does the administration of probiotics decrease the incidence of ventilator-associated pneumonia in critically ill patients?

Background: Ventilator-associated pneumonia (VAP) is a major nosocomial infection in ICUs. Probiotics are thought to decrease colonization and, therefore, infection with serious hospital-acquired pathogens.

Study design: Meta-analysis of five randomized controlled trials.

Setting: ICU patients on mechanical ventilation for at least 24 hours.

Synopsis: Five trials met the inclusion criteria of comparing probiotics to placebo in critically ill patients on mechanical ventilation and reporting the outcome of VAP. Administration of probiotics decreased the incidence of VAP (odds ratio 0.61, 95% CI, 0.41-0.91) and colonization of the respiratory tract with Pseudomonas aeruginosa (OR 0.35, 95% CI, 0.13-0.93).

Length of ICU stay was decreased in the probiotic arm, although this effect was not statistically significant in all analyses. Probiotics had no effect on such outcomes as ICU mortality, in-hospital mortality, or duration of mechanical ventilation.

Bottom line: Probiotics might be an effective strategy to reduce the risk of VAP, even if they do not appear to impact such outcomes as mortality.

Citation: Siempos II, Ntaidou TK, Falagas ME. Impact of the administration of probiotics on the incidence of ventilator-associated pneumonia: a meta-analysis of randomized controlled trials. Crit Care Med. 2010;38(3):954-962. TH

PEDIATRIC HM LITERATURE

By Mark Shen, MD

Renal Ultrasound Identifies Children with High-Grade Vesicoureteral Reflux

Reviewed by Pediatric Editor Mark Shen, MD, medical director of hospital medicine at Dell Children’s Medical Center, Austin, Texas.

Clinical question: What is the diagnostic accuracy of specific renal ultrasound (US) criterion for detection of vesicoureteral reflux (VUR)?

Background: Based on the paradigm that undetected and untreated VUR might lead to long-term complications, voiding cystography traditionally has been recommended for all young children with a first urinary tract infection (UTI). An increasing base of evidence suggests that antibiotic prophylaxis for low-grade VUR might be unnecessary. However, less-invasive methods of screening for high-grade reflux have not yet been identified.

Study design: Secondary analysis of data from a prior prospective study.

Setting: Nephrology department of a French teaching hospital.

Synopsis: One hundred seventeen children (0-16 years) with a UTI were included and underwent renal US and voiding cystography. Patients with a known uropathy or those who had received antibiotics within the past 48 hours were excluded. A generalized linear multilevel model was used to analyze the relationship between standardized renal US criterion and VUR.

Twenty-seven percent of children had VUR and 8% had high-grade VUR (grade ≥3). Pelvic, ureteral, and urinary tract dilatation were significantly associated with high-grade VUR. Ureteral dilatation offered the best combination of standardized criterion, sensitivity (75%), and specificity (88%).

Significant limitations of this study include the use of bag urine cultures and the lack of consensus-based US criterion for ureteral and pelvic dilatation. The authors appropriately caution that these renal US criteria do not identify all children with high-grade VUR and are merely one step toward an intermediate screening strategy for high-grade VUR in order to mitigate adverse effects of universal voiding cystography. Further validation of this work in a clinically representative population will be needed.

Bottom line: Ureteral dilatation accurately identifies children with high-grade VUR.

Citation: Leroy S, Vantalon S, Larakeb A, Ducou-Le-Pointe H, Bensman A. Vesicoureteral reflux in children with urinary tract infection: comparison of diagnostic accuracy of renal US criteria. Radiology. 2010;255(3):890-898.