Radial arterial puncture |
Radioactive perfusion scan |
Radioactive ventilation scan |
Radiographic absorptiometry (RA) |
RAIU |
- antinuclear antibody, anti-DNA antibody, anticentromere antibody,antiextractable nuclear antigen antibody, anti-Jo antibody, and antiscleroderma antibody levels in - Antinuclear Antibody
- plethysmography of - Plethysmography
- antiphospholipid antibodies (aPL): anticardiolipin antibody, IgG, and IgM; anti-beta-2 glycoprotein 1, IgG and IgM; lupus anticoagulant, IgG and IgM levels in - Antiphospholipid Antibodies
- ultrasound, arterial Doppler, lower and upper extremity studies - Ultrasound
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Reactive arthritis, human leukocyte antigen B27 |
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Rectal prolapse, sigmoidoscopy for |
Recurrent venous and arterial thromboses, antiphospholipid antibodies (aPL): anticardiolipin antibody, IgG, and IgM; anti-beta-2 glycoprotein 1, IgG and IgM; lupus anticoagulant, IgG and IgM levels in |
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Red blood cells (RBC) |
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Reiter syndrome, human leukocyte antigen B27 |
Renal disease |
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Respiration, intraocular pressure (IOP) |
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Retained antrum, gastrin and gastrin stimulation test |
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Retinal exudates or hemorrhage |
Retinal vascular occlusion, fluorescein angiography |
Retroviral therapy, CD4/CD8 enumeration and viral load testing |
Reverse grouping, blood |
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