Evoked EMG Monitoring during Ttanspedicular Screw Fixation / 대한척추외과학회지
Journal of Korean Society of Spine Surgery
;
: 177-183, 1998.
Artigo
em Coreano
| WPRIM
| ID: wpr-117171
ABSTRACT
STUDY DESIGN:
In a prospective study of 38 patients undergoing lumbar pedicle screw instrumentation 200 pedicle hole were tested intraoperatively using electrical stimulation.OBJECTIVES:
To evaluate the searching stimulus intensity at pedicle in Korean and to identify the most vulnerable root in transpedicular screw fixation of lumbosacral spine. MATERIALS ANDMETHOD:
Electromyelogram(EMG) was monitored from eight lower extremity muscles bilaterally. Constant current stimulation pulses(0.2msec duration) were delivered through a ball-tipped nasopharyngeal probe used to evaluate each pedicle hole, and evaluated for searching stimulus intensity, the current necessary to evoked EMGRESULTS:
The searching stimulus intensity above 5 mA were 194 cases(97.0%), above 7mA 151cases(75.5%), above 10 mA 107 cases(53.5%) and below 5 mA were 6 cases(3.0%). The vastus medialis muscle is most sensitive in L2(100%), L3(83.3%), tibialis anterior is in L4(68.4%), peroneus longus is in L5(44.2%) and gastrocnemious is in S1(64.5%).CONCLUSIONS:
Stimulus-evoked EMG monitoring is a valuable and efficacious adjunct to lumbar pedicle screw instrumentation. A stimulation threshold greater than 5 mA reliably indicates adequate screw position and the root located at infero-medial side of pedicle is most vulnerab18 in transpedicular screw fixation.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Coluna Vertebral
/
Estudos Prospectivos
/
Extremidade Inferior
/
Estimulação Elétrica
/
Músculo Quadríceps
/
Músculos
Tipo de estudo:
Estudo observacional
Limite:
Humanos
Idioma:
Coreano
Revista:
Journal of Korean Society of Spine Surgery
Ano de publicação:
1998
Tipo de documento:
Artigo
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