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Seafarers Rehabilitation and Compensation Act 1992 – Guide to the Assessment of the Degree of Permanent Impairment Edition 3.0
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Seafarers Rehabilitation and Compensation Act 1992 – Guide to the Assessment of the Degree of Permanent Impairment Edition 3.0
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98 On occasion, other measurements may be needed to define impairment accurately. For example:
a) the elastic and flow resistive properties of the lungs;
b) respiratory muscle strength;
c) arterial blood gases;
d) polysomnography (sleep studies);
e) echocardiography with estimation of pulmonary artery pressure; and
f) quantitative ventilation-perfusion scans of the lung.
99 Measurement of the partial pressures of oxygen and carbon dioxide in arterial blood (PaO2 and PaCO2 respectively) are not usually required to assign impairment ratings accurately. However, individual variation may result in severe impairment in gas exchange when other measures of function indicate only moderate impairment. Arterial PaO2 of <55mm Hg and/or PaCO2 >50mm Hg, despite optimal treatment, is evidence of severe impairment and attracts a WPI rating of 70%.