Circadian rhythm in cardiac arrest: the Singapore experience.

INTRODUCTION: There appears to be a circadian rhythm in the timing of cardiovascular and neurovascular events. The majority of studies have been conducted in western populations. This is the first study to look at the peaks and distribution of out-of-hospital cardiac arrest (OHCA) patients in Singapore. METHODS: The Cardiac Arrest and Resuscitation Epidemiology Studies I and II were prospective observation studies on OHCA in Singapore from October 1, 2001 to October 14, 2004. This study analysed data for patients older than 16 years. All data was collected and recorded as per the Utstein style template. Analysis was done for each of the quadrants of the 24-hour clock: 0001-0600, 0601-1200, 1201-1800 and 1801-2400 hours. RESULTS: Of the 2,428 cases, 2,167 OHCA patients qualified for the final analysis. Their mean ages were in the 60s for all the four quadrants, with a male predominance. The two peaks noted were at 0800 and 1900 hours for cardiac causes of death (n = 1,591), and at 0900 and 2000 hours for non-cardiac causes of death (n = 576). At all times of the day, the majority of OHCA occurred in residences and the bystander cardiopulmonary resuscitation rate ranged from 14.6 to 24.3 percent in the different quadrants of the day. CONCLUSION: OHCA has a bimodal distribution in our local cohort of patients. The information obtained will be utilised for fine-tuning emergency medical services strategies, as we strive to improve our current survival rates for OHCA.

Safety among foreign workers and impact on emergency medicine services in Singapore.

INTRODUCTION: This article aims to study work-related injuries through the eyes of the foreign workers and correlate the findings with their perception of job safety and their level of training received. METHODS: A prospective questionnaire-based survey was conducted between April and October 2002 in the Emergency Department of a secondary level hospital. 285 consecutive foreign workers with work-related injuries were enrolled. RESULTS: The majority of the foreign workers were of Asian origin, male, and 20-30 years of age. 66 percent had prior working experience. 83 percent of those surveyed rated the safety training received as "just enough" or better. There was a positive correlation between job skills and safety training (rs equals 0.733). 82 percent said that safety equipment were available, though only one-half made use of them. 67 percent of the injured received some form of first aid at scene, mainly bandaging. 17 percent did not receive any first aid because of lack of equipment or first aid training. The two most common injuries were wounds to the limbs (33.2 percent) and foreign body (FB) entry into the eyes (17.7 percent). Correspondingly, toilet and suture and removal of FB in the eye were the two most common procedures done. CONCLUSION: In this study, the foreign workers generally felt that the safety and work skills training were adequate. However, there are some problems that still need to be addressed.