Color Doppler ultrasound imaging to evaluate the position of the adductor canal block catheter
Objective To observe the use of color Doppler ultrasound imaging to quickly and accu-rately locate the position of the adductor canal catheter during postoperative recovery after total knee arthro-plasty(TKA).Methods Sixty patients,26 males and 34 females,aged 50-80 years,BMI 18-30 kg/m2,and ASA physical status Ⅰ-Ⅲ,who underwent primary TKA under general anesthesia were en-rolled.Patients were divided into two groups by random number table method:the color Doppler ultrasound imaging group(group CFD)and the"water separation"technology group(group CUG),30 patients in each group.After surgery,patients in group CFD used color Doppler ultrasound imaging to confirm the cath-eter position,and the group CUG used the traditional"water separation"technology of local anesthetic dif-fusion to determine the catheter position.The adductor canal insertion time,total amount of local anesthetic used during insertion were recorded.VAS pain scores at rest and during activity at 4,8,24,48,and 72 hours after surgery were recorded.The total number of analgesic pump compressions,and rescue analgesia,time to the first ambulation after surgery,postoperative hospital stay were recorded.The puncture site ede-ma,hematoma,in-hospital falls and patient postoperative satisfaction scores were recorded.Results Com-pared with group CUG,the adductor canal insertion time and the total amount of local anesthetic used during insertion were significantly decreased(P<0.05),the time to the first ambulation after surgery and postop-erative hospital stay were significantly decreased(P<0.05),the incidence of puncture site edema were significantly decreased and the patient's postoperative satisfaction score were significantly increased in group CFD(P<0.05).There were no significant differences in postoperative pain scores,total number of analge-sic pump compressions,rescue analgesia rate,puncture site hematoma,and in-hospital fall rate between the two groups.Conclusion The use of color Doppler ultrasound imaging during TKA can accurately determine the position of the adductor canal catheter,allow for quick and accurate catheter placement,facilitate early patient ambulation,shorten the patient's postoperative hospital stay,while improving patient satisfaction,and promoting early recovery.
Color Doppler ultrasound imagingTotal knee replacementAdductor canal blockCatheter positionCatheter insertion time