Pulmonary aspiration

Factors influencing the fasting decisions of day-case surgery patients

BACKGROUND

Patients admitted on the day of surgery are asked to arrive fasted, and they often fast for longer than necessary. Although pre-assessment supports patients to prepare for surgery, little is known about how they make fasting decisions.

AIMS

To explore factors influencing the fasting decisions of day-case patients and how to provide information pre-operatively.

METHODS

A qualitative descriptive study design was used. Semi-structured telephone interviews were carried out with 10 patients recruited from a single day-case unit. Data were analysed using thematic analysis.

FINDINGS

Three themes provided context for fasting decisions: the operation as a serious event; the patient as an active partner; and the patient as a rule follower. Length of fast is determined by fasting decisions and practicalities.

CONCLUSION

Patients approach fasting decisions according to their knowledge and experience and their individual preferences for information. Pre-assessment nurses should tailor information to the patient and explain the rationale for fasting.

Mysterious Cause of Respiratory Failure and Multilobar Atelectasis in a 17-Month-Old Male

A 17-month-old male presented to a community hospital emergency department in respiratory distress suggestive of reactive airway exacerbation or pneumonia. He rapidly deteriorated into fulminant respiratory failure with multilobar atelectasis. He was managed with continuous albuterol, intravenous antibiotics, corticosteroids, intubation, and vasopressors. He was then transported to a tertiary Children’s Hospital. The patient was extubated 20 hours after presentation and again developed respiratory failure while in the pediatric intensive care unit. During preparation for extracorporeal membrane oxygenation, he quickly stabilized following reintubation and bronchodilator therapy. He was extubated approximately 24 hours later, and subsequently discharged after a 9-day hospitalization. Outpatient investigation after discharge revealed dysphagia, milk allergy, and eosinophilic esophagitis. In this case, it is highly probable that aspiration secondary to dysphagia and eosinophilic esophagitis led to respiratory failure. This case demonstrates the possible rapid decompensation from aspiration due to insidious inflammation of the esophagus and dysphagia in an otherwise anatomically normal toddler.

Chewing gum for 1 h does not change gastric volume in healthy fasting subjects. A prospective observational study

STUDY OBJECTIVE

Perioperative fasting guidelines differ in their approaches to chewing gum in the preoperative period. Current recommendations range from canceling the surgery to proceeding with it. Given this lack of consensus, we performed gastric ultrasound assessments in healthy volunteers before and after a standardized period of chewing gum. The objective of our study was to determine if chewing gum for 1 h change the gastric volume.

DESIGN

Observational prospective analytical study.

SETTING

Bedside gastric ultrasound.

PATIENTS

Following institutional Review Board approval, 55 healthy (American Society of Anesthesiologists class I to II) fasted (non-surgical research) volunteers provided written informed consent to participate in the study. Morbid obesity, renal failure, diabetes mellitus, pregnancy and previous upper abdominal surgery were exclusion criteria.

INTERVENTIONS

Volunteers chewed gum for 1 h between the first and second assessment.

MEASUREMENTS

Four gastric ultrasound assessments were performed, the first one at baseline and then hourly thereafter.

MAIN RESULTS

Fifty-five healthy volunteers were studied. The proportion of subjects who presented a completely empty stomach (Grade 0 antrum) was similar at baseline and after 1 h of gum-chewing [81% vs. 84%, p = 0.19, CI 95% (-12%, 16%)]. Among those subjects who had visible fluid at baseline, the volume remained unchanged throughout the study period.

CONCLUSIONS

One hour of gum-chewing had no significant effect on the gastric fluid volume of healthy volunteers, suggesting that it may be safe for healthy subjects to chew gum prior to elective surgery.

Prophylactic versus clinically-driven antibiotics in comatose survivors of out-of-hospital cardiac arrest-A randomized pilot study

AIM

To investigate benefits of prophylactic antibiotics in comatose survivors of out-of-hospital cardiac arrest (OHCA).

METHODS

Patients without evidence of tracheobronchial aspiration on admission bronchoscopy were randomized to prophylactic Amoxicillin-Clavulanic acid 1.2g every 8h (P) or clinically-driven antibiotics (C) administered if signs of infection developed during initial 7days of intensive care unit (ICU) stay.

RESULTS

Among 83 patients enrolled between September 2013 and February 2015, tracheobronchial aspiration was documented in 23 (28%). Accordingly, 60 patients were randomized. Percentage of patients on antibiotics between days 1-5 was significantly greater in P group. White blood count, C-reactive protein, procalcitonin (PCT) and CD 64 significantly increased during the postresuscitation phase. Except for lower CRP and PCT in group P on day 6 (p<0.05), there was no significant differences. Mini BAL on day 3 was less often positive in group P (7% vs. 42%; p<0.01). There was no significant difference in other microbiological samples and X-ray signs of pneumonia cumulatively documented in 50% in both groups. Use of vasopressors/inotropes (93% in both groups), duration of mechanical ventilation (5.4±3.7 vs. 5.2±3.1 days), tracheal intubation (6.5±4.6 vs. 5.9±4.3 days), ICU stay (7.7±5.2 vs. 6.9±4.5 days), survival (73% vs. 73%) and survival with good neurological outcome (50% vs. 40%) were also comparable between P and C groups.

CONCLUSION

Bronchoscopy on admission documented tracheobronchial aspiration in 28% of comatose survivors of OHCA. In the absence of aspiration, prophylactic antibiotics did not significantly alter systemic inflammatory response, postresuscitation pneumonia, ICU treatment and outcome (ClinicalTrials.gov Identifier: NCT02899507).