Neurokinin-1 receptor antagonists for the prevention of postoperative nausea and vomiting

Pharmacological Strategies for Postdischarge Nausea and Vomiting: Evidence-based Review Update

PURPOSE

Evaluate the effectiveness of various drugs in preventing postdischarge nausea and vomiting (PDNV).

DESIGN

Systematic review.

METHODS

A search for evidence was conducted in PubMed, CINAHL, Cochrane Collaboration, and Google Scholar and gray literature. Only randomized controlled trials examining a pharmacological agent to prevent PDNV were included in the study. The quality appraisal of the literature was conducted using the proposed algorithm described in the Johns Hopkins Nursing Evidence-Based Practice Evidence Level and Quality Guide.

FINDINGS

A total of 8 randomized controlled trials involving 1,441 patients were analyzed. The efficacy of pharmacological agents, including dexamethasone, olanzapine, ondansetron, palonosetron, ramosetron, promethazine, and casopitant in the prevention of PDNV, varied. Additionally, a combination of two or more drugs is a more effective therapy than using a single drug in mitigating PDNV. The review also underscored the individual patient factors that can play a significant role in identifying appropriate prevention and treatment modalities.

CONCLUSIONS

There is limited evidence on the efficacy of pharmacological agents in preventing PDNV. The scarcity of large-scale, clinical trials specifically focusing on PDNV restricts the ability to recommend prophylactic drug therapy for reducing its incidence.

Prevalence and time course of postoperative nausea and vomiting and severe pain in patients under general anesthesia with patient-controlled intravenous analgesia

Introduction

Postoperative nausea and vomiting (PONV) and pain are common and distressing complications in patients undergoing surgery. However, it remains uncertain whether timing of the postoperative course or the diel rhythm influences the occurrence of PONV or severe pain. Therefore, we aimed to explore the temporal distribution of PONV and severe pain.

Material and methods

In this prospective observational study, we enrolled patients aged 18-65 years with American Society of Anesthesiologists classifications I-III, who were scheduled for surgery under general anesthesia. Patients were visited postoperatively at regular intervals (every 6 h over a 24-h period). Incidence of PONV was recorded and categorized based on real-time divisions: before dawn (00:00-05:59), morning (06:00-11:59), afternoon (12:00-17:59), and evening (18:00-23:59) and as sequential periods (i.e., 0-6, 6-12, 12-18, and 18-24 h). Severe pain and use of additional remedies were also recorded.

Results

A total of 724 patients were included in the final analysis. Of these, 14.92 % experienced PONV within the first 6 h, and 8.29 % received antiemetic therapy. Occurrence of PONV and administration of remedies declined over the 24-h postoperative period. The lowest rate of PONV was observed during the pre-dawn hours (5.66 %). There was no statistically significant difference in the incidence of PONV 24-h postoperatively between surgeries with different end times. Patients underwent orthopedic surgeries had the highest incidence of PONV during 18:00-23:59, gynecological surgery patients had the highest incidence at 12:00-17:59, and 6:00-11:59 for other surgery patients. All patients had the lowest incidence during 0:00-5:59. During the initial 6-h postoperative period, 24.59 % of patients experienced severe pain, which declined in the remaining episodes. Patients who underwent orthopedic and gynecological surgeries exhibited similar temporal patterns and distribution characteristics of PONV and severe pain.

Discussion

Both PONV and severe pain declined within the 24-h postoperative period, particularly within the first 6 h. Additionally, the onset patterns of PONV vary among patients undergoing different types of surgeries, all patients demonstrated decreased susceptibility to PONV between 00:00-05:59. Our findings enhance prevention and treatment strategies within an optimized timeframe during the postoperative course.