High-frequency linear transducer improves detection of an intrauterine pregnancy in first-trimester ultrasonography
| Autor: | Robert Jones, Diane Gramer, Devin Harper, Matthew Tabbut |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Adult
Abdominal pain medicine.medical_specialty Point-of-Care Systems Transducers Pilot Projects Ultrasonography Prenatal 03 medical and health sciences 0302 clinical medicine Pregnancy Medicine Humans Vaginal bleeding 030212 general & internal medicine Prospective Studies Prospective cohort study business.industry 030208 emergency & critical care medicine General Medicine medicine.disease Confidence interval Pregnancy Ectopic First trimester Pregnancy Trimester First Transducer medicine.anatomical_structure Vagina Emergency Medicine Female Radiology medicine.symptom business |
| Zdroj: | The American journal of emergency medicine. 34(2) |
| ISSN: | 1532-8171 |
| Popis: | Objective The objective was to determine if the need for transvaginal ultrasonographic examination can be decreased by the addition of the transabdominal high-frequency, 12-4–MHz linear transducer after a failed examination with the 6-2–mHz curvilinear transducer when evaluating for an intrauterine pregnancy (IUP). Methods This is a prospective pilot study of women in their first trimester of pregnancy presenting to the emergency department with abdominal pain and/or vaginal bleeding. If no IUP was identified using the curvilinear transducer via the transabdominal approach, they were subsequently scanned using the linear transducer. Patients without evidence of an IUP transabdominally were scanned via the transvaginal approach. Results Eighty-one patients were evaluated; no IUP was visualized in 27 using the standard curvilinear transducer approach, and these then had an ultrasonography performed with the linear transducer. Of these, 9 patients (33.3%; 0.95 confidence interval [CO], 15.5%-51.1%) were found to have an IUP with the linear transducer. For the 18 patients who received a transvaginal scan, 15 patients (83.3%; 0.95 CI, 66.1%-100%) had no IUP identified with the transvaginal transducer, and 3 (16.7%; 0.95 CI, 0%-33.9%) had an IUP identified. Conclusions The transabdominal use of a high-frequency linear transducer in the evaluation of patients in the first trimester after failed curvilinear transducer results in a clinically significant reduction in the need for transvaginal ultrasonography to confirm the presence of an IUP. |
| Databáze: | OpenAIRE |
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