Observation of behavior in sedated, mechanically ventilated children.

This observation study examined the behaviors of 20 sedated, mechanically ventilated children, ages 1 month to 14 years. Observations were made using the Comfort Scale at the beginning and end of the two-hour observation period and of body and facial movements, behavior state, and environmental activity occurring during the 2-hour period. Mean Comfort scores at both measurement points were 16, below the target sedation level. In addition, while most children were in sleep states, they exhibited many body movements, particularly of the upper extremities. Body movements were related to behavior state but not to Comfort scores. Environmental activity was not significantly related to child activity, behavior state, or Comfort scores. Sedation scales in children may be best used in conjunction with behavior observations although further research is needed to determine the predictive capabilities of either scales or behavior on actual ventilation outcomes

Subglottic secretion volume and viscosity: effect of systemic volume and oral hydration.

Removal of secretions from the subglottic space, which is the larynx cavity below the glottis that contains the vocal cords, reduces the risk for ventilator associated pneumonia. Relationships between factors associated with subglottic secretion volume and viscosity have not been investigated. Subglottic secretions may have a possible link with systemic volume status and oral cavity hydration. The purpose of this study was to examine the relationships among systemic volume, oral cavity hydration, and subglottic secretion (SS) volume and viscosity in mechanically ventilated adults. Seventy daily oral and SS samples were obtained over a 24-hour collection period from 15 mechanically ventilated adults. Markers of systemic volume and oral cavity hydration and measurements of SS volume and viscosity were collected and analyzed. The daily volume of oral secretions ranged from 0 to 1.0 mL (SD 0.180 mL), and SS ranged from 0 to 15 mL (SD 22.9 mL). BUN/creatinine ratio (marker of systemic volume status) was moderately correlated with oral secretion volume (r = -0.43). Weak correlations were identified between SS volume and oral volume (r = 0.29) and SS viscosity and oral viscosity (r = 0.22). No other linear relationships were identified among the variables. This study confirmed that SS accumulation occurs, the amount varies widely, and the secretions are highly viscous. SS volume and viscosity were not found to have a very strong relationship with the variables measured. Nevertheless, clinical implications for practice are present. Further research is needed to understand secretion dynamics in ventilated adults to prevent complications and promote positive patient outcomes

Effect of backrest elevation on the development of ventilator-associated pneumonia

BACKGROUND: Ventilator-associated pneumonia is a common complication of mechanical ventilation. Backrest position and time spent supine are critical risk factors for aspiration, increasing the risk for pneumonia. Empirical evidence of the effect of backrest positions on the incidence of ventilator-associated pneumonia, especially during mechanical ventilation over time, is limited. OBJECTIVE: To describe the relationship between backrest elevation and development of ventilator-associated pneumonia. METHODS: A nonexperimental, longitudinal, descriptive design was used. The Clinical Pulmonary Infection Score was used to determine ventilator-associated pneumonia. Backrest elevation was measured continuously with a transducer system. Data were obtained from laboratory results and medical records from the start of mechanical ventilation up to 7 days. RESULTS: Sixty-six subjects were monitored (276 patient days). Mean backrest elevation for the entire study period was 21.7°. Backrest elevations were less than 30° 72% of the time and less than 10° 39% of the time. The mean Clinical Pulmonary Infection Score increased but not significantly, and backrest elevation had no direct effect on mean scores. A model for predicting the Clinical Pulmonary Infection Score at day 4 included baseline score, percentage of time spent at less than 30° on study day 1, and score on the Acute Physiology and Chronic Health Evaluation II, explaining 81% of the variability (F = 7.31, P = .003). CONCLUSIONS: Subjects spent the majority of the time at backrest elevations less than 30°. Only the combination of early, low backrest elevation and severity of illness affected the incidence of ventilator-associated pneumonia

Oral health status and development of ventilator-associated pneumonia: A descriptive study

BACKGROUND: Ventilator-associated pneumonia is a significant cause of morbidity and mortality and may be influenced by oral health. OBJECTIVE: To describe the relationship between ventilator-associated pneumonia and oral health status, changes in oral health status during the first 7 days after intubation, and microbial colonization of the oropharynx and trachea. METHODS: A total of 66 patients were enrolled within 24 hours of intubation and were followed up for up to 7 days. Data on oral health measures and the Clinical Pulmonary Infection Score (CPIS) were collected at baseline, day 4 (n = 37), and day 7 (n = 21). A regression model was used to predict risk of pneumonia at day 4. RESULTS Dental plaque and oral organisms increased over time. Correlations were significant for baseline and day 4 dental plaque (P < .001), baseline salivary lactoferrin and day 4 plaque (P = .01), and lower salivary volume and higher day 4 CPIS (P = .02). Potential pathogens were identified in oral cultures for 6 patients before or at the same time as the appearance of the organisms in tracheal aspirates. Correlations were significant with day 4 CPIS for score on the Acute Physiology and Chronic Health Evaluation (APACHE) II (P = .007), day 4 salivary volume (P = .02), interaction of APACHE II score and day 1 CPIS (P < .001), and interaction of day 1 CPIS and plaque (P = .01). CONCLUSIONS: Higher dental plaque scores confer greater risk for ventilator-associated pneumonia, particularly for patients with greater severity of illness. Salivary volume and lactoferrin may affect the risk

The potential for actigraphy to be used as an indicator of sitting discomfort

Objective: A novel technique that uses actigraphy, the study of activity involving the use of body-mounted accelerometers, to detect the discomfort-related movements of a sitting individual has been proposed as a potential indicator of sitting discomfort, and the purpose of this study was to test its validity. Background: Objective measurement of sitting discomfort has always been challenging for researchers. Electromyographic measurements, pressure mapping, and a wide range of other techniques have all been investigated with limited success. Method: The activity monitor’s ability to detect and measure seated movement was assessed, and 12 participants were tested on four different chairs (100-min sessions for each). Results: The activity monitor was able to detect par-ticipants ’ sitting movements (Pearson coefficients&gt; 0.9). The chairs were shown to have significantly different subjective discomfort ratings, all of which increased over time. The movements detected by the activity monitor also increased significantly with time, and the amount measured was greater in the chairs rated as most uncomfortable. Regression analysis indicated that the actigraphy data were able to account for 29.6 % of the varia-tion in perceived discomfort ratings. Conclusion: Actigraphy can reliably detect sitting movements and may be of use in measuring sitting discomfort. Application: Potential applications of this technique exist for seating research in the automotive industry, health care, and office and leisure chairs

The role of nurses in preventing adverse events related to respiratory dysfunction: literature review

Aims. This paper reports a literature review examining the relationship between specific clinical indicators of respiratory dysfunction and adverse events, and exploring the role of nurses in preventing adverse events related to respiratory dysfunction.Background. Adverse events in hospital are associated with poor patient outcomes such as increased mortality and permanent disability. Many of these adverse events are preventable and are preceded by a period during which the patient exhibits clearly abnormal physiological signs. The role of nurses in preserving physiological safety by early recognition and correction of physiological abnormality is a key factor in preventing adverse events.Methods. A search of the Medline and CINAHL databases was conducted using the following terms: predictors of poor outcome, adverse events, mortality, cardiac arrest, emergency, oxygen, supplemental oxygen, oxygen therapy, oxygen saturation, oxygen delivery, assessment, patient assessment, physical assessment, dyspnoea, hypoxia, hypoxaemia, respiratory assessment, respiratory dysfunction, shortness of breath and pulse oximetry. The papers reviewed were research papers that demonstrated a relationship between adverse events and various clinical indicators of respiratory dysfunction.Results. Respiratory dysfunction is a known clinical antecedent of adverse events such as cardiac arrest, need for medical emergency team activation and unplanned intensive care unit admission. The presence of respiratory dysfunction prior to an adverse event is associated with increased mortality. The specific clinical indicators involved are alterations in respiratory rate, and the presence of dyspnoea, hypoxaemia and acidosis.Conclusions. The way in which nurses assess, document and use clinical indicators of respiratory dysfunction is influential in identifying patients at risk of an adverse event and preventing adverse events related to respiratory dysfunction. If such adverse events are to be prevented, nurses must not only be able to recognise and interpret signs of respiratory dysfunction, but must also take responsibility for initiating and evaluating interventions aimed at correcting respiratory dysfunction.<br /