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Evaluation
of Muscle Strength Change by BDORT Tester
---Comparison
of Muscle Strength Curve between BDORT Beginners and Experts
Mitsuhiro Nishimura M.D., Yasuhiro Shimotsuura M.D., F.I.C.A.E., Motomu Ohki, M.Sc, Hiroyuki Maezawa＊, Genzo Kishimoto＊＊, Yoshiaki Omura M.D.,M.Sc., F.I.C.A.E.＊＊＊
ORT Life Science Research Institute, Fukuoka
＊ Yasukawa electric Mfg., Fukuoka
＊＊ Kishimoto Apparatus, Fukuoka
Background) In Bi-Digital O-Ring Test (BDORT) , detection of muscle strength change is often subjective for beginners. To evaluate a degree of subjectivity, we developed a special instrument , BDORT tester, which pulls bi-digital o-ring and senses the degree of its opening.
Aim) The purpose is to test whether this instrument can be used reliably for direct BDORT to beginners as well as experts. We studied if there is some difference in muscle strength wave form between beginners and experts using BDORT tester.
Experimental Subject)
We allocated subjects into following two groups.
*BDORT expert group
BDORT experience for more than 1 year
(doctors, nurses) ;13 cases
*BDORT beginner group
(patients) ;55 cases
Method)
1) Instruction of BDORT tester
2) Demonstration
3) Determination of air pressure (auto)
4) Inspection of control muscle strength curve (wave form when no body area is touched)
5) Confirmation of reproducibility of control muscle strength curves by repeated testing
Result)
There was a marked difference in control muscle strength curves between two groups. The angles in surge of degree of opening for experts and beginners were 50.9±20.7°、29.6±9.3°, respectively.
Conclusion)
* The angles in surge of degree of opening were significantly steeper in experts. Muscle strength wave form on BDORT tester can be used for evaluation of one’s technical skill of performing BDORT.
* In BDORT experts, muscle strength change is more easily detected from opening pressure rather than degree of opening, because muscle strength curve is steeper.