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Diagnosis of early pregnancy with A‐mode ultrasound A preliminary report
Author(s) -
Haverkamp Albert D.,
Thompson Horace E.,
Yasuzawa S. Steve
Publication year - 1975
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/jcu.1870030212
Subject(s) - medicine , pregnancy , ultrasound , gestation , obstetrics , gestational sac , gestational age , first trimester , gynecology , radiology , genetics , biology
An A‐mode ultrasonic analyzer was used to detect pregnancy and to determine gestational age in 102 patients, 77 of whom were pregnant and 25 of whom were not pregnant. All pregnant patients were in the first trimester. Polaroid photographs were taken of the echo pattern display and diagnosis was compared with that of the clinical examination. Results indicate, using only the Polaroid photograph of the patient's A‐scope echo pattern, it is possible to (1) diagnose pregnancy with an accuracy rate of 87.2% and (2) estimate the week of gestation, within a tolerance of 21 days of the clinical examination, with an accuracy rate of 84.5%.