- N -Acetyl procainamide (NAPA)
- Nails, fungal culture of
- NAPA ( N -acetyl procainamide)
- Narcolepsy, EEG in
- Narcotic addiction, effects on syphilis serology testing
- Narrow-angle glaucoma
- Nasal passages, growths in, sinus
- Nasogastric feeding, sodium levels and
- Nasogastric feeding tube, chest x-ray in placement of
- Nasogastric suction
- Nasopharyngeal carcinoma, infectious mononucleosis and
- Nasopharyngeal swab
- NAT (nucleic acid test)
- National Comprehensive Cancer Network (NCC)
- Nausea. See also Vomiting
- Near drowning
- Nearsightedness, refraction in
- Necator americanus infection, O & P in
- Neck
- Necrosis
- Needle biopsy. See also Fine-needle aspiration biopsy
- Neisseria, in cultures
- Neisseria catarrhalis, in cultures
- Neisseria gonorrhoeae
- Nelson’s syndrome, ACTH levels in
- Neonatal hyaline membrane disease, plasminogen level in
- Neonatal immune thrombocytopenia, platelet antibodies in
- Neonatal lupus, anti-SS-A/anti-SS-B in
- Neonatal prematurity. See also Premature infant
- Neonatal seizure, vitamin B 6 levels in
- Neovascularization
- Nephritis. See also Glomerulonephritis
- Nephroblastoma, erythropoietin level in
- Nephrogenic diabetes insipidus
- Nephropathy. See also Renal disease
- Nephrosis
- Nephrotic syndrome
- Nephrotoxic drugs, BUN and
- Nerve conduction velocity test (NCV)
- nerve fiber analysis
- Nerve transection, ENG in
- Nesiritide
- Neural tube defect
- Neuritis
- Neuroblastoma
- Neurofibrillary tangles, tau protein in
- Neurofibroma, skin biopsy for
- Neurogenic bladder
- Neuroma, acoustic, SRT in
- Neuromuscular dysfunction
- Neuromuscular junction diseases, EMG in
- Neuromuscular junction testing
- Neuropathy
- Neutrophil cell
- Nevus
- Newborn. See also Neonatal entries
- Newborn screening
- Nicotine, effect on EEG
- Niemann-Pick syndrome
- Night blindness, vitamin A levels in
- Nitrazine test
- Nitrendipine, effects on DHEAS levels
- Nitrites, in urinalysis
- NMP (nuclear matrix protein)
- Nocardia, in cultures
- Nocardia infection, bronchoscopy in
- Nodal lymphoma, lymphangiography in
- Nodular hyperplasia, liver and spleen scan in
- Nonimmunological hemolytic disease of newborn, G6PD levels in
- Nonparathyroid hypercalcemia, PTH levels in
- Nonspherocytic anemia
- Nonstress test (NST)
- Nonthyroidal disease, total triiodothyronine levels in
- Nontoxic nodular goiter, biopsy in
- Norepinephrine
- Normal flora
- Normetanephrine
- Normochromic cell
- Nortriptyline
- Norwalk virus, in cultures
- Nose, foreign bodies in, sinus endoscopy for
- Nosebleed, vitamin K and
- NST (nonstress test)
- N-terminal parathyroid hormone
- NTx (collagen cross-linked N-telopeptide)
- Nuclear matrix protein (NMP)
- Nuclear scan
- Nucleic acid amplification test (NAAT)
- Nucleic acid test (NAT)
- Nutrition
- Nystagmus, visual field test in
Davis's Lab & Diagnostic Tests