Strasser R P, Bass M J
Can Fam Physician. 1987 Nov;33:2505-8.
At a time of controversy about the appropriate use of obstetric ultrasound, this study explores the effect of availability on ultrasound use. Using a historical cohort design with chart review, pregnancy ultrasound rates were compared between two teaching family-medical centres, one with on-site ultrasound facilities and one without. Pregnant patients at the centre with on-site facilities (n=23) were 2.2 times more likely (p<0.05) to have an ultrasound scan than patients (n=20) cared for at the centre without facilities. At both centres, patients who had one ultrasound scan stood a 50% chance of having another. The implications for family medicine training are discussed.
在关于产科超声合理使用存在争议之际，本研究探讨了超声设备可及性对超声使用情况的影响。采用回顾病历的历史性队列设计，对两家教学型家庭医疗中心的妊娠超声检查率进行了比较，其中一家有现场超声设备，另一家没有。有现场超声设备的中心的孕妇（n = 23）接受超声检查的可能性是没有设备的中心的患者（n = 20）的2.2倍（p<0.05）。在两个中心，接受过一次超声检查的患者再次接受超声检查的几率均为50%。文中讨论了该研究对家庭医学培训的启示。
