Electrophysiological Abnormalities in Upper Extremities After Brachiocephalic A‐V Fistulas Construction in Predialysis Patients

Figures & data

Table 1. Electrophysiological Results Before and After Brachiocephalic A‐V Fistulas Construction in All Predialysis Patients Enrolled in the Study

	Nerve	Baseline	3 weeks	3 months	p^(0–3w)	p^(0–3m)	p^(3w–3m)
MNCV	Median	47.0 ± 5.7	42.3 ± 6.3	41.1 ± 5.4	< 0.01	< 0.01	NS
	Ulnar	48.3 ± 6.9	46.0 ± 8.6	43.4 ± 9.0	NS	< 0.01	NS
	Radial	53.8 ± 8.0	47.3 ± 8.9	43.6 ± 7.1	< 0.01	< 0.01	NS
SNCV	Median	40.6 ± 7.8	32.3 ± 6.2	33.5 ± 6.2	< 0.01	< 0.01	NS
	Ulnar	42.2 ± 8.5	35.5 ± 7.7	36.3 ± 8.0	< 0.01	< 0.05	NS
MDL	Median	4.1 ± 1.3	4.6 ± 1.6	6.4 ± 1.2	NS	< 0.01	< 0.01
	Ulnar	3.4 ± 1.2	4.1 ± 1.6	4.7 ± 1.2	NS	< 0.01	< 0.01
	Radial	3.6 ± 1.4	4.0 ± 1.1	5.1 ± 1.6	NS	< 0.01	< 0.01
SDL	Median	3.9 ± 1.4	5.9 ± 1.3	6.8 ± 1.4	< 0.01	< 0.01	< 0.05
	Ulnar	4.3 ± 1.8	5.1 ± 1.7	6.0 ± 2.0	NS	< 0.01	NS
CMAP	Median	5.6 ± 2.5	5.1 ± 2.7	5.1 ± 2.6	NS	NS	NS
	Ulnar	6.3 ± 2.9	5.5 ± 2.8	5.9 ± 2.9	NS	NS	NS
	Radial	5.0 ± 1.3	5.1 ± 1.6	5.3 ± 1.4	NS	NS	NS
SNAP	Median	13.5 ± 9.9	10.1 ± 9.1	10.6 ± 9.8	NS	NS	NS
	Ulnar	10.7 ± 8.3	9.6 ± 10.5	9.9 ± 9.1	NS	NS	NS

The values are means ± SD; MNCV and SNCV (m/sec), CMAP (mV), SNAP (mcV), MDL and SDL (msec).

Table 2. MNCV Before and After Brachiocephalic A‐V Fistula Construction in Non‐Diabetic Patients Compared to Diabetic Patients

	Nerve	Baseline	3 weeks	3 months	p^(0–3w)	p^(0–3m)	p^(3w–3m)
Median	ND	50.2 ± 4.9	47.1 ± 4.1	49.6 ± 5.4	NS	NS	NS
	D	43.7 ± 4.6	37.5 ± 4.2	32.6 ± 7.6	< 0.01	< 0.01	< 0.03
	p	0.01	0.01	0.001
Ulnar	ND	53.2 ± 4.0	54.7 ± 5.6	51.0 ± 6.6	NS	NS	NS
	D	43.4 ± 5.4	37.3 ± 3.7	35.4 ± 5.8	< 0.03	< 0.01	NS
	p	0.001	0.001	0.001
Radial	ND	54.1 ± 4.4	48.0 ± 8.5	52.7 ± 7.8	NS	NS	NS
	D	46.0 ± 7.2	40.1 ± 6.1	36.7 ± 10.3	< 0.03	< 0.01	< 0.03
	p	0.02	0.02	0.01

The values are means ± SD; MNCV (m/sec).

Table 3. SNCV Before and After Brachiocephalic A‐V Fistulas Construction in Non‐diabetic Patients Compared to Diabetic Patients

	Nerve	Baseline	3 weeks	3 months	p^(0–3w)	p^(0–3m)	p^(3w–3m)
Median	ND	42.5 ± 6.0	40.4 ± 3.8	39.3 ± 4.1	NS	NS	NS
	D	38.1 ± 3.0	30.2 ± 2.9	26.1 ± 3.9	< 0.01	< 0.01	< 0.01
	p	0.03	0.01	0.01
Ulnar	ND	44.0 ± 6.7	40.0 ± 5.0	45.2 ± 10.2	NS	NS	NS
	D	39.1 ± 10.0	31.0 ± 9.6	27.0 ± 6.2	< 0.03	< 0.01	< 0.03
	p	0.03	0.02	0.01

The values are means ± SD; SNCV (m/sec).

Table 4. DML Before and After Brachiocephalic A‐V Fistulas Construction in Non‐diabetic Patients Compared to Diabetic Patients

	Nerve	Baseline	3 weeks	3 months	p^(0–3w)	p^(0–3m)	p^(3w–3m)
Median	ND	4.0 ± 1.7	4.2 ± 1.0	4.1 ± 1.5	NS	NS	NS
	D	4.7 ± 1.3	5.0 ± 1.9	8.2 ± 1.4	NS	< 0.01	< 0.01
	p	NS	NS	0.01
Ulnar	ND	3.0 ± 1.5	3.9 ± 1.7	3.9 ± 1.3	NS	NS	NS
	D	4.0 ± 1.0	4.4 ± 1.4	5.9 ± 1.1	NS	< 0.01	< 0.01
	p	NS	NS	0.01
Radial	ND	3.2 ± 1.6	3.8 ± 1.6	3.8 ± 1.4	NS	NS	NS
	D	4.1 ± 1.3	4.8 ± 1.3	6.4 ± 1.2	NS	< 0.01	< 0.01
	p	NS	NS	0.01

The values are means ± SD; MDL (msec).

Table 5. SDL Before and After Brachiocephalic A‐V Fistulas Construction in Non‐diabetic Patients Compared to Diabetic Patients

	Nerve	Baseline	3 weeks	3 months	p^(0–3w)	p^(0–3m)	p^(3w–3m)
Median	ND	3.7 ± 1.7	5.2 ± 1.3	5.1 ± 1.4	NS	NS	NS
	D	4.3 ± 1.3	6.4 ± 1.6	8.3 ± 1.3	< 0.01	< 0.01	< 0.01
	p	NS	NS	0.01
Ulnar	ND	4.0 ± 1.6	5.0 ± 1.8	4.9 ± 1.4	NS	NS	NS
	D	4.6 ± 1.6	6.0 ± 1.4	7.8 ± 1.2	NS	< 0.01	< 0.01
	p	NS	NS	0.01

The values are means ± SD; SDL (msec).

Table 6. SNAP Before and After Brachiocephalic A‐V Fistulas Construction in Non‐diabetic Patients Compared to Diabetic Patients

	Nerve	Baseline	3 weeks	3 months	p^(0–3w)	p^(0–3m)	p^(3w–3m)
Median	ND	15.1 ± 8.0	14.2 ± 8.3	14.4 ± 9.7	NS	NS	NS
	D	7.6 ± 6.1	5.2 ± 3.9	3.2 ± 1.9	NS	< 0.03	NS
	p	0.03	0.01	0.002
Ulnar	ND	14.3 ± 8.4	12.0 ± 13.4	14.7 ± 9.5	NS	NS	NS
	D	7.1 ± 6.6	5.1 ± 4.9	3.0 ± 2.6	NS	< 0.03	NS
	p	0.03	0.03	0.002

The values are means ± SD; SNAP (mcV).

Figure 1. MNCV of median, ulnar and radial nerves before surgery (baseline), at three weeks and at three months after the construction of brachiocephalic A‐V fistulas in non‐diabetic (ND) patients compared to diabetic (D) patients.

Figure 2. SNCV of median and ulnar nerves before surgery (baseline), at three weeks and at three months after the construction of brachiocephalic A‐V fistulas in non‐diabetic (ND) patients compared to diabetic (D) patients.

Table 7. CMAP Before and After Brachiocephalic A‐V Fistulas Construction of Median Nerve in Patients Who Developed Edema Compared to Patients Who Did Not Develop Edema

	Baseline	3 weeks	3 months	p^(0–3w)	p^(0–3m)	p^(3w–3m)
No edema	4.5 ± 2.8	4.8 ± 2.6	3.7 ± 2.8	NS	NS	NS
Edema	4.3 ± 2.1	1.6 ± 2.1	3.8 ± 2.4	0.02	NS	0.02
p	NS	0.02	NS

The values are means ± SD; CMAP (mV).

Figure 3. CMAP of median nerve before surgery (baseline), at three weeks and at three months after the construction of brachiocephalic A‐V fistulas in patients who developed edema compared to patients who did not develop edema.