Vascular monitoring lantern ring

A vessel monitoring system includes a collar configured to be positioned about a vessel of a patient; and a transducer coupled to the collar. The collar may be formed from a strap that is wrapped around the blood vessel of the patient and maintained in a closed configuration. The transducer is configured to emit an ultrasonic signal transmitted through a blood vessel of a patient. 脉管监测系统包括：套环，构造成绕患者的血管定位；和换能器，联接到套环。套环可以由绑带形成，绑带绕患者的血管缠绕并维持在闭合构造中。换能器被构造成发射通过患者的血管传输的超声波信号。