Effects of Early Opening of the Outpatient Phlebotomy Room on Turnaround Time and Patient Satisfaction

This study evaluated the impact of starting outpatient phlebotomy services 30 minutes earlier than the conventional time to improve patient flow and satisfaction.Using the data from March to June 2024, the issues related to congestion and delays were identified.A quality improvement intervention began on February 24, 2025, shifting the phlebotomy start time from 08:30 to 08:00.Its impact was assessed using three key indicators: (1) the number of test results reported by 10:00 AM; (2) average waiting time for patients registered between 07:30 and 08:30; and (3) satisfaction scores from patients and caregivers.The data were collected from the electronic medical records and a prepost survey.After implementation, the test results reported by 10:00 AM increased by 141% (from 477.5 to 1,151.25).The waiting times dropped by 62.6% (from 33 minutes 42 seconds to 12 minutes 36 seconds).The satisfaction scores among 100 respondents (response rate 100%) improved by 51.4% (from 2.92 to 4.42).These exceeded the initial improvement goals.Supporting strategies included staff reassignment, training, and customized phlebotomy stations.The early opening effectively improved the laboratory turnaround time and patient experience, but it increased staff workload.Therefore, adequate staffing and structural support are necessary for long-term sustainability.