Median effective volume of 0.3％ ropivacaine in old patients with femoral intertrochanteric fracture undergoing ultrasound-guided fascia iliaca compartment block
- VernacularTitle:0.3％罗哌卡因用于老年患者超声引导下髂筋膜间隙阻滞的半数有效容量
- Author:
Wenqing ZHANG
1
;
Zhijian LIN
;
Jiabin LI
;
Huanghui WU
;
Guozhong CHEN
Author Information
1. 363000,福建医科大学附属漳州市医院麻醉科
- Keywords:
Fascia iliaca compartment block;
Ultrasonography;
Femoral intertrochanteric fracture;
Ropivacaine;
Median effect volume
- From:
The Journal of Clinical Anesthesiology
2017;33(12):1152-1154
- CountryChina
- Language:Chinese
-
Abstract:
Objective To identify the median effective volume (EV50) of 0.3 ％ ropivacaine in the old patients with femoral intertrochanteric fracture undergoing ultrasound-guided fascia iliaca compartment block (FICB).Methods Thirty-nine patients,18 males and 21 females,aged 65-98 years old,ASA physical status Ⅱ or Ⅲ,scheduled for femoral intertrochanteric fracture surgery were sequentially received ultrasound-guided FICB.Patients were sequentially given a pre-set volume of 0.3％ ropivacaine according to our pilot study.A sign of "+" was marked if the patient was positive to FICB and totally pain-free 30 min after block,and the next patient would be assigned to a lower volume of ropivacaine.Otherwise,a sign of was marked if the patient was negative to FICB that was partially or not pain-reliefed 30 min after block,and the next patient would be assigned to a larger volume of ropivacaine.The trial was terminated when 7 inflection points appeared.The EV50 of 0.3％ ropivacaine with 95％ confidence interval (CI) was calculated according to sequential method.Results Twenty (51.3％) in a total of 39 patients received a successful ultrasound-guided FICB.The EV50 and 95 ％ CI of 0.3 ％ ropivacaine using ultrasound-guided FICB in old patients with femoral intertrochanteric fracture was 25.37 ml (95％CI 22.06-29.19 ml).Conclusion The EV50 of 0.3％ ropivacaine using ultrasound-guided FICB in the old patients with femoral intertrochanteric fracture is 25.37 ml.
