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Updated: Apr 30, 2026

Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge
Published on: January 20, 2023
Learning profiles for noninvasive transcutaneous Doppler ultrasound
Cangel P Y Chan1, Yan-Ling Li, Nandini Agarwal
1aAccident and Emergency Medicine Academic Unit bSchool of Public Health and Primary Care, Division of Biostatistics, Prince of Wales Hospital, The Chinese University of Hong Kong cDepartment of Chemistry, The Hong Kong University of Science and Technology, Hong Kong SAR dDepartment of Emergency, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
Establishing proficiency in noninvasive transcutaneous Doppler ultrasound requires significant training. Cumulative sum analysis effectively assesses individual learning curves for this critical medical skill.
Area of Science:
- Medical Education
- Cardiovascular Ultrasound Technology
Background:
- Noninvasive transcutaneous Doppler ultrasound is crucial for cardiac output monitoring.
- Standardized learning profiles are needed to ensure proficiency.
Purpose of the Study:
- To establish learning profiles for noninvasive transcutaneous Doppler ultrasound.
- To evaluate skill acquisition in trainees using cumulative sum analysis.
Main Methods:
- Four trainees received a lecture, demonstration, and workshop.
- Trainees practiced on 50 participants, with skill acquisition assessed against a trainer's performance.
- Cumulative sum (CUSUM) graphical method was used for analysis.
Main Results:
- Proficiency in aortic scans was achieved by all trainees after 18-36 assessments.
- Pulmonary scan competence was reached by only half the trainees, requiring a minimum of 36 assessments.
- Specific assessment numbers and timeframes were established for achieving 95% success rates in aortic and pulmonary scans.
Conclusions:
- Significant learning is necessary to achieve proficiency in noninvasive transcutaneous Doppler ultrasound.
- Cumulative sum analysis is a valuable tool for individual quality assessment in medical training.
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