Determining the normal range of the calcaneus-metatarsal angles in the second-trimester fetal ultrasound examination using the novel measurement technique "Melek's angles": A cross-sectional study.
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引用次数: 0
Abstract
Objectives: The aim of this study is to establish the normal calcaneus-metatarsal angles in order to facilitate the recognition of fetal foot deformities. Therefore, a novel measurement technique was determined using ultrasound and applied to nonanomalous fetuses in the 18th to 23rd gestational weeks.
Materials and methods: This cross-sectional study included 100 low-risk, nonanomalous fetuses in the 18th to 23rd weeks of gestation. Measurements were obtained using the novel measurement technique in fetal ultrasound examination. Fetal biometry, foot sole length, first and fifth metatarsal diaphyseal length measurements were taken. The acute angle measurement of the line segment passing between the calcaneus outer lateral and proximal fifth metatarsal with the long axis of the first metatarsal diaphysis (CA-mtt1) and long axis of the fifth metatarsal diaphysis (CA-mtt5) was taken. Interobserver and intraobserver reliabilities were assessed by intraclass correlations (ICC).
Results: A strong positive correlation was detected between bi-parietal diameter (BPD) and foot sole length, first metatarsal diaphyseal length and fifth metatarsal diaphyseal length (p < 0.0001). No significant correlation of these CA-mtt1 and CA-mtt5 angles with BPD was detected (p = 0.35, p = 0.82, respectively). The data suggest that the CA-mtt1 and CA-mtt5 angles remained consistently within a narrow range and were determined to be 20.0° ± 8.7° and 7.8° ± 7.5°, respectively. Intraobserver and interobserver agreement for CA-mtt1 angle was moderate (ICC, 0.655) and moderate (ICC, 0.615), for CA-mtt5 angle was moderate (ICC, 0.631) and moderate (ICC, 0.605), respectively.
Conclusion: A normal reference range was established for fetal sole length, first metatarsal diaphysis length, fifth metatarsal diaphysis length, CA-mtt1 angle, and CA-mtt5 angle in the 18th to 23rd weeks of gestation. It was determined that the CA-mtt1 and CA-mtt5 angles remained relatively constant within a narrow range throughout the assessed gestational weeks.
期刊介绍：
The Journal of Clinical Ultrasound (JCU) is an international journal dedicated to the worldwide dissemination of scientific information on diagnostic and therapeutic applications of medical sonography.
The scope of the journal includes--but is not limited to--the following areas: sonography of the gastrointestinal tract, genitourinary tract, vascular system, nervous system, head and neck, chest, breast, musculoskeletal system, and other superficial structures; Doppler applications; obstetric and pediatric applications; and interventional sonography. Studies comparing sonography with other imaging modalities are encouraged, as are studies evaluating the economic impact of sonography. Also within the journal''s scope are innovations and improvements in instrumentation and examination techniques and the use of contrast agents.
JCU publishes original research articles, case reports, pictorial essays, technical notes, and letters to the editor. The journal is also dedicated to being an educational resource for its readers, through the publication of review articles and various scientific contributions from members of the editorial board and other world-renowned experts in sonography.
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