Abstract

To evaluate the use of point-of-care ultrasound (POCUS) for the assessment of patients experiencing first-trimester bleeding or abdominal pain by family physicians working in family medicine clinics following first-trimester POCUS training and certification. Multisite, retrospective chart review. Two hospital-affiliated academic family medicine clinics in Toronto, Ont. Twelve family physicians who completed a first-trimester POCUS training and certification course. The primary outcome was the proportion of family physicians using POCUS during their evaluations of patients in the first trimester of pregnancy in the 6 months following the FPs' successful completion of the Family Medicine Obstetrical Ultrasound (FaMOUS) course. Secondary outcomes included indications for POCUS use, diagnostic accuracy of POCUS compared with radiologist-interpreted ultrasound, pregnancy outcomes, and emergency department visits within 10 days of the index family medicine clinic visit. Of the 12 certified family physicians, 7 (58.3%) used POCUS during their assessments of first-trimester patients during the study period. The FPs used POCUS with 56 patients for the following indications: 11 (19.6%) had only vaginal bleeding, 5 (8.9%) had only abdominal pain, and 8 (14.3%) had both vaginal bleeding and abdominal pain; the indication for 32 patients (57.1%) was unclear. Forty-six patients (82.1%) underwent a subsequent radiologist-interpreted ultrasound within 10 days of the index POCUS test. Compared with radiologist-interpreted ultrasound, POCUS had a sensitivity of 91.3% (95% CI 79.2% to 97.6%) for documenting intrauterine pregnancy and a sensitivity of 81.4% (95% CI 66.6% to 91.6%) for documenting the presence of fetal cardiac activity. Following a first-trimester POCUS certification course, family physicians used POCUS for the assessment of first-trimester patients with varying frequency and for indications other than vaginal bleeding or abdominal pain. Further study is needed to assess the clinical impact of office-based POCUS, unforeseen barriers and facilitators to its use, and patient and provider preferences.

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