Respiratory Paralysis Clinical Trial
Official title:
Diaphragmatic Height Index: the New Diagnostic Test for Phrenic Nerve Dysfunction
Diaphragmatic contraction is controlled by phrenic nerve which consists of anterior rami of
3rd- 5th cervical nerve roots. Usually, It can't be evaluated from history taking and
physical examination. Thus the diaphragmatic elevation on chest radiograph is assumed to
identify the phrenic nerve dysfunction. Normally, the right diaphragm is higher than the
left side about 1.5 ± 0.9 centimeters or 0.5 ± 0.3 time of vertebral height. Although there
are several methods to determine the diaphragmatic elevation from previous studies, the
accuracy, reliability, intra and inter-observer variation are problem.
Neurotization is the effective procedure to restore upper extremity function in root
avulsion type. Phrenic nerve is one of the common donor nerves which used for this
procedure. But sometimes, concomitant injury of this nerve can occur. Therefore, the
investigators established "Diaphragmatic height index (DHI)" from chest radiograph to use as
the diagnostic test for phrenic nerve dysfunction.
n/a
Observational Model: Case Control, Time Perspective: Retrospective
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