Effect of Extracorporeal Magnetic Innervation (ExMI) Pelvic Floor Therapy on Urinary Incontinence after Radical Prostatectomy

Daeyong Koo; Seong Min So; Jae Sung Lim

doi:10.4111/kju.2009.50.1.23

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Koo, So, and Lim: Effect of Extracorporeal Magnetic Innervation (ExMI) Pelvic Floor Therapy on Urinary Incontinence after Radical Prostatectomy

Original Article

Korean J Urol 2009;50(1):23-27.

Published online: 19 January 2009

DOI: https://doi.org/10.4111/kju.2009.50.1.23

Effect of Extracorporeal Magnetic Innervation (ExMI) Pelvic Floor Therapy on Urinary Incontinence after Radical Prostatectomy

Daeyong Koo, Seong Min So¹, Jae Sung Lim

From the Department of Urology, Chungnam National University College of Medicine, Daejeon, Korea

¹The Catholic University of Korea College of Medicine, Seoul, Medicine, Daejeon, Korea

Received 18 June 200816 October 2008

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose

To evaluate the safety and clinical effects of extracorporeal magnetic innervation (ExMI) for urinary incontinence after radical prostatectomy.

Materials and Methods

Thirty-two patients with urinary incontinence after radical prostatectomy were randomly assigned to receive either ExMI treatment or pelvic floor training alone. For the ExMI group, treatment was initiated 1 week after catheter removal and the treatment sessions were for 20 minutes, twice a week, for 8 weeks. For the control group, only pelvic floor muscle exercises were performed. Patients were followed up at 1 week and 1, 2, 3, and 6 months. Outcomes were assessed by 24-hour pad weight testing, the number of pads used daily, and a quality-of-life survey (I-QoL).

Purpose

To evaluate the safety and clinical effects of extracorporeal magnetic innervation (ExMI) for urinary incontinence after radical prostatectomy.

Materials and Methods

Results

Leakage weight during the 24 hours after removing the catheter was 655g and 646g for the ExMI and control groups, respectively. At 1 month, it was 147g and 187g; at 2 months, 33g and 81g (p=0.001); and at 3 months, 9g and 45g (p=0.001), respectively. Finally, 6 months later, leakage weight was less than 10g in both groups. The number of pads used daily after removing the catheter was 4.2 and 4.1 for the ExMI and control groups, respectively. At 1 month, it was 1.5 and 1.8; at 2 months, 0.6 and 0.9 (p=0.033); and at 3 months, 0.1 and 0.6 (p=0.002), respectively. Finally, 6 month later, pads counts were 0 and 0.1. I-QoL scores decreased after surgery, but gradually improved in both groups. No other side effects or adverse events were observed.

Conclusions

ExMI provided earlier recovery of continence than in the control group after radical prostatectomy.

Keywords: Prostatectomy, Urinary incontinence

REFERENCES

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Fig. 1.

Changes in mean pad weight in the extracorporeal magnetic innervation (ExMI) and control groups. *: p＜0.05.

Fig. 2.

Changes in mean daily pad counts in the extracorporeal magnetic innervation (ExMI) and control groups. *: p＜0.05.

Fig. 3.

Changes in mean quality-of-life survey scores in the extracorporeal magnetic innervation (ExMI) and control groups. *: p＜0.05.

Table 1.

Patient characteristics

Characteristic	ExMI group (n=16)	Control group (n=16)	p-value
Age (years)	65.1±6.8	67.1±4.0	0.323^†
Incontinece volume* (g)	655±283	646±264	0.927^†
PSA	12.7±6.6	14.2±6.3	0.505^†
Nerve sparing			0.704^‡
No	12	10
Yes	4	6
Stage			1.000^‡
pT2	12	13
pT3	4	3

PSA: prostate-specific antigen, ExMI: extracorporeal magnetic innervation.

^* : incontinence volume 1 day after catheter removal

^† : Student’s t-test

^‡ : Fisher’s exact test

Table 2.

Mean pad weights, mean pad counts, and quality-of-life survey (QoL) scores

	Pad weight		Pad count		QoL score
	Control	ExMI	Control	ExMI	Control	ExMI
1 day	646	655	4.1	4.2	97	98
1 week	456	436	3.2	3.2	48	54
1 month	187	147	1.8	1.5	72	79
2 months	81	33	0.9	0.6	83	88
3 months	45	9	0.6	0.1	89	93
6 months	7	1	0.1	0	93	95

ExMI: extracorporeal magnetic innervation, QoL: quality of life

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