Davis's Lab & Diagnostic Tests
- Rabies, viral testing for
- Radioactive Iodine Uptake
- Radiofrequency and Microwave Ablation, Liver
- Radiographic absorptiometry (RA)
- Radiographic dyes
- Radiography, bone
- Radionuclide
- Radionuclide bone scan
- Radionuclide ventriculogram
- Rapid hydration, albumin and albumin/globulin (A/G) ratio in
- Rapid strep screen
- Rapid urease test (RUT)
- Reactive arthritis, human leukocyte antigen B27
- Rectal electromyography
- Rectal prolapse, sigmoidoscopy for
- Recurrent fetal loss, antiphospholipid antibodies (aPL): anticardiolipin antibody, IgG, and IgM; anti-beta-2 glycoprotein 1, IgG and IgM; lupus anticoagulant, IgG and IgM levels in
- 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
- Red Blood Cell Count, Indices, Morphology, and Inclusions
- Reducing substances
- Reflux disease, upper gastrointestinal and small bowel series
- Refractory anemia, red blood cell count, indices, morphology, and inclusions in
- Refractory reaction to platelet transfusion
- Regurgitation, echocardiography
- Reiter syndrome, human leukocyte antigen B27
- Renal artery aneurysm, computed tomography (CT)
- Renal cell cancer, computed tomography (CT)
- Renal laceration, computed tomography (CT)
- Renal loss of calcium, calcium, blood, total and ionized
- Renal vascular disease, renogram of
- Renogram
- Renovascular hypertension
- Repaglinide
- Replacement therapy, iron studies
- Reproductive system, estradiol
- Reserpine
- Respiration, intraocular pressure (IOP)
- Respiratory arrest, blood and urine osmolality in
- Respiratory symptoms, viral testing for
- Respiratory syncytial virus (RSV)
- Respiratory tract infection, cytology, sputum
- Retained antrum, gastrin and gastrin stimulation test
- Reticulocyte Count
- Reticulocytes
- Retinal edema, fluorescein angiography
- Retinal exudates or hemorrhage
- Retinal occlusion of the artery or vein
- Retinal vascular occlusion, fluorescein angiography
- Retinitis pigmentosa
- Retinol
- Retrograde Ureteropyelography
- Retroperitoneal lymph nodes, computed tomography (CT)
- Retroperitoneal lymphomas, lymphangiography of
- Retroviral therapy, CD4/CD8 enumeration and viral load testing
- Rett syndrome
- Reverse grouping, blood
- Rh(D) immune globulin
- RhD alloimmunization
- RhD-negative
- RhD-positive RBCs
- Rheumatic arthritis, complement, total, C3, and C4
- Rheumatic disease, complement, total, C3, and C4
- Rh genotyping
- Rh immune globulin, fetomaternal bleed determination
- Rhinovirus
- Rh typing
- Ricin
- Ricinus communis
- Rickettsial disease, syphilis testing
- Rifampin, fecal analysis
- Right atrial pressure (RAP), cardiac catheterization
- Riley-Day syndrome, homovanillic acid and vanillylmandelic acid
- Rinne test
- Rivaroxaban
- Rocky Mountain spotted fever, platelet count and tests of platelet function in
- Rosette screen, fetomaternal bleed determination
- Rosette test (qualitative screening)
- Rosiglitazone
- Rotarix (RV1)
- RotaTeq (RV5)
- Rotator cuff tears, magnetic resonance imaging of
- Rotavirus gastroenteritis (RGE)
- Routine blood pressure, cardiac catheterization