Cet article va intéresser les urgentistes qui ne pratiquent pas encore l’échographie endo vaginale (pour l’instant ! )
D’après Matthew Tabut , l’utilisation de la sonde linéaire haute fréquence améliore la détection des grossesses intra utérine au 1er Trimestre ! Avant de passer la sonde au gynéco en cas de non visualisation d’une GIU , tentez la haute fréquence !
Ca peut vous tirer d’affaires si vous suspectez une GEU et que la sonde Convexe est prise à défaut .
High-frequency linear transducer improves detection of an intrauterine pregnancy in first trimester ultrasound
To determine if the need for transvaginal ultrasound 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).
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.
81 patients were evaluated and, no IUP was visualized in 27 using the standard curvilinear transducer approach and these then had an ultrasound performed with the linear transducer. Of these, 9 patients (33.3%, 0.95 CI 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.
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.