Preventing Ventilator-Associated Pneumonia: Nursing Bundle Evidence

Introduction and Study Overview

This paper analyzes and critiques the work of Tolentino-DelosReyes et al. (2007), entitled "Evidence-Based Practice: Use of the Ventilator Bundle to Prevent Ventilator-Associated Pneumonia," published in the American Journal of Critical Care in January 2007. The stated purpose of the study is the examination of the knowledge possessed by critical care nurses concerning the use of the ventilator bundle in the prevention of ventilator-associated pneumonia (VAP). Tolentino-DelosReyes et al. identify VAP as a safety issue of vital importance in treating patients who are critically ill and who are also receiving mechanical ventilation as part of their treatment regimen.

The American Association of Critical Care Nurses (AACN) recommends specific steps for reducing the incidence of ventilator-associated pneumonia. These steps are as follows: (1) elevation of the patient's head at 30 to 45 degrees unless a medical contraindication exists; (2) ongoing removal of subglottic secretions; (3) changing the ventilator circuit no more frequently than every forty-eight hours; and (4) ensuring that nurses wash their hands both before and after contact with each patient (Tolentino-DelosReyes et al., 2007).

AACN Guidelines and CDC-Endorsed Best Practices

A key point supporting the soundness of this work is that the guidelines developed for reducing VAP are recognized by the Centers for Disease Control and Prevention (CDC) as best practice in the prevention of nosocomial pneumonia (Tolentino-DelosReyes et al., 2007). There is a substantial body of current evidence supporting head-of-bed (HOB) elevation at approximately thirty to forty degrees, including findings from 18 randomized controlled trials, an inception cohort design, comparison studies, patient surveillance, data collection efforts, a longitudinal and descriptive study, and a prospective study with a descriptive design.

Study Design, Participants, and Data Collection

Previous research in the area has also addressed oral care — specifically oral aspiration — and its effects on the goal of reducing VAP in critically ill patients. Tolentino-DelosReyes et al. (2007) built upon this body of evidence by conducting a study that included the administration of a ten-item test developed to assess nurses' knowledge related to VAP. The test questions were drawn from a PowerPoint presentation used by the project director during education sessions in the Coronary Care Unit (CCU) and the Surgical Intensive Care Unit (SICU). Topics covered included best-practice guidelines, microorganisms that cause VAP, hand washing, supine positioning, enteral feeding, factors related to VAP, the definition of VAP, and the diagnosis of pneumonia (Tolentino-DelosReyes et al., 2007).

Study participants included 14 day-shift and 14 night-shift nurses from the SICU, along with 15 day-shift and 18 night-shift nurses from the CCU, representing approximately 65% to 70% of all nurses in each unit (Tolentino-DelosReyes et al., 2007). Both pretests and posttests were administered immediately before and after the in-service education sessions. Observational methods were also employed during the month before and the month following the education sessions, assessing the nursing practice patterns of staff providing care to 30 patients in the SICU and 69 patients in the CCU — all of whom were receiving mechanical ventilation.

HOB elevation was measured by checking beds equipped with angle measurement devices to specify the degree of elevation (Tolentino-DelosReyes et al., 2007). Additional factors assessed included: (1) nurse hand-washing practices, encompassing the use of artificial nails, nail polish, and rings worn during patient contact; and (2) auditing of patient charts for HOB elevation, frequency of oral care, and frequency of nasogastric tube checks in the preceding 12 hours. Data collection and analysis were conducted by two critical care nursing experts who reviewed project team members over a six-month period (Tolentino-DelosReyes et al., 2007).

Conclusion and Implications for Evidence-Based Practice

The work of Tolentino-DelosReyes et al. (2007) contributes meaningful evidence in support of structured nursing education as a mechanism for improving VAP prevention practices in critical care settings. The measurable gains in HOB elevation compliance, oral care frequency, nasogastric tube monitoring, and hand hygiene demonstrate that targeted education sessions aligned with CDC and AACN guidelines can produce concrete improvements in nursing practice. Sustained reinforcement of these evidence-based behaviors — through consistent documentation, ongoing surveillance, and repeated educational initiatives — is essential to achieving long-term reductions in VAP incidence and improving outcomes for mechanically ventilated patients.