A Randomized Observer-Blinded Controlled Trial to Compare Pre-Emptive with Postoperative Ultrasound-Guided Mandibular Nerve Block for Postoperative Analgesia in Mandibular Fracture Surgeries

Figures & data

Figure 1 Ultrasound-guided mandibular nerve block.

Figure 2 Visual analog scale (VAS).

Table 1 Demographic Data

Parameters	Group A	Group B	P-value
Age	34.066 ± 5.353	32.060 ± 4.094	0.108*
Duration of surgery (min)	98.17 ± 11.795	95 ± 3.57	0.162*
Gender (M/F)	20/10	16/14	0.625*
ASA (I/II)	24/6	22/8	0.373*
Mandibular part fracture (Body/Angle/Ramus/Condyle)	8/9/1/12	10/8/1/11	0.324*

Notes: Values are in Mean ± SD or number of patients. *p-value not significant (unpaired t-test, Chi-square test).

Figure 3 Consolidated Standards of Reporting Trials (CONSORT) flow chart.

Table 2 Anaesthetic Data

Parameters	Group A	Group B	P-value
Total morphine consumption (mg)	4.566 ± 0.72	5.93 ± 0.87	< 0.0001^Ϯ
Duration of post op analgesia (min)	794.08 ± 89.56	505.33 ±73.15	< 0.0001^Ϯ
Additional fentanyl consumption	4 (13.3%)	11(36.7)	0.037^Ϯ

Notes: Values are in Mean ± SD or number of patients (percentage). ^Ϯp-value significant (unpaired t-test, Chi-square test).

Table 3 Perioperative Heart Rate

Time in Min	Group A	Group B	P-value
Baseline	84.76 ± 4.90	86.20 ± 5.12	0.272*
15	83.26 ± 3.69	81.43 ± 5.08	0.115*
30	72.70 ± 3.88	74.96 ± 5.45	0.069*
45	71.13 ± 3.59	74.63 ± 5.21	0.003^Ϯ
60	68.96 ± 4.05	73.3 ± 3.75	< 0.0001^Ϯ
75	68.06 ± 3.44	71.66 ± 2.99	0.0004^Ϯ
90	69.26 ± 4.63	74.4 ± 2.53	< 0.0001^Ϯ
105	71.5 ± 6.1	74.2 ± 3.3	0.037^Ϯ
120	70.63 ± 5.55	74.06 ± 2.56	0.003^Ϯ

Notes: Values are in Mean ± SD. *p-value not significant (unpaired t-test). ^Ϯp-value significant.

Table 4 Perioperative Mean Arterial Pressure

Time in Min	Group A	Group B	P-value
Baseline	92.36 ± 3.42	93.53 ± 3.04	0.168*
15	79.9 ± 4.35	80.96 ± 3.48	0.299*
30	77.4 ± 3.44	78.5 ± 3.63	0.233*
45	74.56 ± 2.36	75.43 ± 2.71	0.949*
60	73.93 ±1.89	74.1 ± 1.77	0.726*
75	74.03 ± 2.65	74.2 ±1.79	0.772*
90	76.83 ± 4.09	77.52 ± 3.37	0.493*
105	78.26 ± 4.2	78.76 ± 3.35	0.612*
120	77.63 ± 3.90	78.46 ± 3.77	0.402*

Notes: Values are in Mean ± SD. *p-value not significant (unpaired t-test).

Figure 4 Visual analog scale scores.

Notes: Values are in mean. *P-value.