Journal List > J Korean Foot Ankle Soc > v.20(3) > 1043391

Lee and Yune: The Efficacy of Postoperative Ultrasound-Guided Sciatic Nerve Block to Relieve Pain after Hallux Valgus Surgery

Abstract

Purpose:

Modified Mau and Akin osteotomy for hallux valgus is followed by moderate to severe postoperative pain. Ultrasound-guided sciatic nerve block can be an effective option for pain control. We attempted to evaluate the efficacy of the ultrasound-guided sciatic nerve block in controlling postoperative pain.

Materials and Methods:

The charts of 59 consecutive patients were retrospectively reviewed between December 2014 and August 2015. Twenty-eight patients (the patient group) has received the ultrasound-guided sciatic nerve block after surgery, and 31 patients (the control group) has not received such procedure. The primary outcome was the satisfaction scale for postoperative pain control and postoperative visual analogue scale (VAS) score.

Results:

The VAS score at postoperative day one was significantly lower in the patient group than in the control group. The satisfaction scale for pain control for postoperative 1 day was significantly different between the two groups. In patient group, most patients have rated positively (‘strongly agree’ 42.9%, ‘agree’ 42.9%); however, in the control group, the rating scales were distributed relatively negatively (‘strongly agree’ 9.7%, ‘agree’ 22.6%, ‘neutral’ 29.0%, ‘disagree’ 25.8%, ‘strongly disagree’ 12.9%). The number of postoperative rescue analgesics injection was significantly lower in the patient group than in the control group.

Conclusion:

Postoperative ultrasound-guided sciatic nerve block was effective for pain relief after hallux valgus surgery.

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Figure 1.
The trend in daily changes of pain scale after operation was significantly different between two groups (p<0.001).
jkfas-20-135f1.tif
Figure 2.
In patient group, most patients have rated positively (‘strongly disagree’ 0%, ‘disagree’ 3.6%, ‘neutral’ 10.7%, ‘agree’ 42.9%, ‘strongly agree’ 42.9%); however, in control group, rating scales were distributed relatively negatively (‘strongly disagree’ 12.9%, ‘disagree’ 25.8%, ‘neutral’ 29.0%, ‘agree’ 22.6%, ‘strongly agree’ 9.7%) (p=0.001). *Question: How would you rate the following? “Pain control was effective for 24 hours after operation.”
jkfas-20-135f2.tif
Table 1.
Demographic Data and Clinical Data for Patients
Patient group (n=28) Control group (n=31) p-value
Sex (male/female) 2/26 5/26 0.43
Age (yr) 51.3±14.6 49.9±12.5 0.70
Weight (kg) 61.0±11.5 59.6±10.6 0.63
Height (cm) 157.5±7.5 157.5±7.6 0.97
Body mass index (kg/m2) 24.4±3.5 23.9±3.3 0.57
Duration of surgery (min) 39.9±8.6 43.7±9.2 0.11
Total tourniquet time (min) 45.6±8.5 49.5±9.4 0.10

Values are presented as number only or mean±standard deviation. Patient group: patients who have received an ultrasound-guided sciatic nerve block after surgery, Control group: patients who have not received an ultrasound-guided sciatic nerve block after surgery.

Table 2.
Difference of VAS between the Two Group
Postoperative day Patient group (n=28) Control group (n=31) p-value
#1 VAS 2.7±2.8 6.2±1.8 0.000
#2 VAS 3.8±2.8 4.3±2.1 0.485
#3 VAS 3.1±2.7 2.6±2.1 0.481
#4 VAS 2.3±2.3 1.9±1.9 0.419
#5 VAS 2.1±2.4 1.7±1.7 0.482
#6 VAS 1.5±1.9 1.5±1.7 0.965
#7 VAS 1.2±1.8 1.3±1.5 0.893

Values are presented as mean±standard deviation. Patient group: patients who have received an ultrasound-guided sciatic nerve block after surgery, Control group: patients who have not received an ultrasound-guided sciatic nerve block after surgery. VAS: visual analogue scale.

Table 3.
Difference of Tendency to Receive Same Operation for Other Foot between Two Groups
Answer Patient group (n=28) Control group (n=31)
Yes* 24 (96.0) 22 (78.6)
No* 1 (4.0) 6 (21.4)
Total 25 (100) 28 (100)

Values are presented as number (%). Patient group: patients who have received an ultrasound-guided sciatic nerve block after surgery, Control group: patients who have not received an ultrasound-guided sciatic nerve block after surgery. *Question: “Would you like to receive same operation for other foot, if you have hallux valgus?”

Non-response of each group: 3.

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