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Iwata, Toshio,Mitoro, Mari,Kuzumoto, Naoya The Korean Pain Society 2014 The Korean Journal of Pain Vol.27 No.2
Background: To improve residual pain management in acute cervical radiculopathy treated with NSAIDs, the feasibility of early and repeated low-dose interscalene brachial plexus block (IS-BPB) needs to be assessed. Methods: This was a prospective study on patients receiving NSAIDs (loxoprofen) for cervical radiculopathy of ${\leq}2$-week onset. Pain was assessed using the visual analogue scale (VAS). A low-dose ultrasonography (USG)-guided IS-BPB (dexamethasone [1.65 mg; 0.5 ml] and mepivacaine [1%; 3.0 ml]) was performed at baseline and weekly thereafter for 4 weeks in an outpatient setting for the intervention group. All patients were evaluated using a visual satisfaction score (VSS) at week 4. Patients with baseline VAS scores < 70 (mild to moderate pain; MM group) and ${\geq}70$ (severe pain; SE group) were compared to the controls receiving NSAIDs. Results: A total of 316 IS-BPBs were performed in the intervention group. There was a significant difference in the decline in the VAS from week 0 to week 3 in the MM and SE groups (P < 0.05); however, from week 3 to week 4, the therapeutic effect exhibited no significant difference. Thirteen patients at week 2 (15.5%; MM: 27.7%; SE: 0%), 43 at week 3 (51.2%; MM: 83.0%; SE: 10.8%), and 47 at week 4 (56.0%; MM: 85.1%; SE: 18.9%) achieved a VAS score of ${\leq}20$. Patient satisfaction was high, and the decrease in VAS scores in both groups was significant (P < 0.05) compared to the controls. Conclusions: Weekly, low-dose, USG-guided IS-BPB can be implemented for early pain relief in acute cervical radiculopathy, with high patient satisfaction.
Yasushige Mukunoki,Takeshi Horiguchi,Hiroshi Nakatake,Masaki Kuzumoto,Makoto Hagiwara,Hirofumi Akagi 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper describes a physical analysis of gate-source voltage (vGS) dependencies of parasitic capacitors of a discrete Silicon-Carbide (SiC) MOSFET. A new picture of depletion region that induces the parasitic capacitors is proposed. The proposed picture successfully explains the origins and the intrinsic relations of the vGS-dependencies of the parasitic capacitors. Subsequently, the effects of the vGS dependent models are considered via the detailed analysis of the switching waveforms, which clarifies their individual impacts on the switching waveforms.
( Toshio Iwata ),( Mari Mitoro ),( Naoya Kuzumoto ) 대한통증학회 2014 The Korean Journal of Pain Vol.27 No.2
To improve residual pain management in acute cervical radiculopathy treated with NSAIDs, the feasibility of early and repeated low-dose interscalene brachial plexus block (IS-BPB) needs to be assessed. Methods: This was a prospective study on patients receiving NSAIDs (loxoprofen) for cervical radiculopathy of ≤ 2-week onset. Pain was assessed using the visual analogue scale (VAS). A low-dose ultrasonography (USG)-guided IS-BPB (dexamethasone [1.65 mg; 0.5 ml] and mepivacaine [1%; 3.0 ml]) was performed at baseline and weekly thereafter for 4 weeks in an outpatient setting for the intervention group. All patients were evaluated using a visual satisfaction score (VSS) at week 4. Patients with baseline VAS scores <70 (mild to moderate pain; MM group) and ≥ 70 (severe pain; SE group) were compared to the controls receiving NSAIDs. Results: A total of 316 IS-BPBs were performed in the intervention group. There was a significant difference in the decline in the VAS from week 0 to week 3 in the MM and SE groups (P <0.05); however, from week 3 to week 4, the therapeutic effect exhibited no significant difference. Thirteen patients at week 2 (15.5%; MM: 27.7%; SE: 0%), 43 at week 3 (51.2%; MM: 83.0%; SE: 10.8%), and 47 at week 4 (56.0%; MM: 85.1%; SE: 18.9%) achieved a VAS score of ≤ 20. Patient satisfaction was high, and the decrease in VAS scores in both groups was significant (P <0.05) compared to the controls. Conclusions: Weekly, low-dose, USG-guided IS-BPB can be implemented for early pain relief in acute cervical radiculopathy, with high patient satisfaction. (Korean J Pain 2014; 27: 125-132)