List of Medical Abbreviations: S

Abbreviation Meaning
s without (s with a bar over it) (from Middle English sans, borrowed from Old French sans, Latin sine)
S sacrum
Sx symptoms
S1 first heart sound
S2 second heart sound
S3 third heart sound
S4 fourth heart sound
S&O salpingo-oophorectomy
SA sinoatrial node
SAAG serum–ascites albumin gradient
SAB staphylococcal bacteremia
spontaneous abortion (that is, miscarriage)
SAH subarachnoid hemorrhage
SAM systolic anterior motion of the mitral valve
SAN sinoatrial node
SAPS II simplified acute physiology score
SAPS III simplified acute physiology score
SAR Seasonal Allergic Rhinitis
Sarc Sarcoidosis
SARS severe acute respiratory syndrome
SB small bowel (see small intestine)
SBE subacute bacterial endocarditis
SBFT small bowel follow through
SBMA spinal bulbar muscular atrophy
SBO small bowel obstruction
SBP systolic blood pressure
spontaneous bacterial peritonitis
s.c. subcutaneous (from Latin subcutis)
SCA Spinocerebellar ataxia
SCC squamous cell carcinoma
SCD sudden cardiac death
SCD Sequential compression device
SCD Sickle Cell Disease
SCLC small cell lung cancer
SCID severe combined immunodeficiency
SCIWORA spinal cord injury without radiographic abnormality
scope microscope or endoscope
S.D. subdermal
standard deviation
SDH subdural hematoma
SDTI suspected deep tissue injury
Sed sedimentation (rate) (see erythrocyte sedimentation rate)
SEE syphilis elimination effort
Segs segmented cells
SEM systolic ejection murmur (see heart murmur)
SERM selective estrogen receptor modulator
SERT serotonin transporter
SFA superficial femoral artery
serum folic acid
SGA small for gestational age
SG cath Swan–Ganz catheter (see pulmonary artery catheter)
SG Specific Gravity (in Urinanalysis)
SGB Stellate ganglion Block
SGOT serum glutamic oxaloacetic transaminase
SGPT serum glutamic pyruvic transaminase
social history (personal habits, living situation, job)
SHBG sex hormone-binding globulin
shob shortness of breath (see dyspnea)
SHPT Secondary Hyperparathyroidism
SHx surgical history
SI International System of Units
suicidal ideation
seriously ill
sacroiliac (joint)
SIADH syndrome of inappropriate antidiuretic hormone
SICU surgical intensive care unit
SIBO small intestinal bacterial overgrowth
SID Semel in die meaning once daily. Only used in veterinary medicine.
SIDS sudden infant death syndrome
SIL squamous intraepithelial lesion
SIMV synchronized intermittent mechanical ventilation
si op. sit if needed (from Latin si opus sit)
SIRS systemic inflammatory response syndrome
SIT stress inoculation training (see posttraumatic stress disorder)
SJS Stevens–Johnson syndrome
SK streptokinase
sl sublingual
SLE systemic lupus erythematosus
SLEV St. Louis virus
SLN sentinel node biopsy
SLNB Sentinel Lymph node biopsy
SLR straight leg raise (see Lasègue's sign)
SLL small lymphocytic lymphoma
SLP Speech-language pathologist
SM multiple sclerosis (from Latin sclerosis multiplex)
SMA sequential multiple analysis
superior mesenteric artery
spinal muscle atrophy
SMA-6 six-channel serum multiple analysis
SMA-7 serum metabolic assay
SMN statement of medical necessity
SMS senior medical student
SMT spinal manipulative therapy
SMV superior mesenteric vein
SN student nurse ;
skilled nursing
SNB sentinel node biopsy (ductal carcinoma)
SNP sodium nitroprusside;
single nucleotide polymorphism
SNRI serotonin–norepinephrine reuptake inhibitor
SNV sin nombre virus (the most common type of hantavirus)
SO salpingo-oophoritis
SOAP subjective, objective, assessment, plan (how physicians’ notes may be organized)
SOB shortness of breath (see dyspnea)
SOBOE shortness of breath on exertion
SOL space-occupying lesion
Sol solution
SOOB send out of bed
SOS if needed (from Latin si opus sit)
status post
SPE streptococcal pyrogenic exotoxin
Spec specimen
SPECT single-photon emission computed tomography
SPEP serum protein electrophoresis
SPET single-photon emission tomography
Sp. fl. spinal fluid (see cerebrospinal fluid)
Sp. gr. specific gravity
SR slow release (see also time release technology (medicine))
SROM spontaneous rupture of membranes
SRS stereotactic radiotherapy
SS Hemoglobin SS (HbSS) (see in sickle-cell disease = SS disease)
S/S signs & symptoms
SSC secondary sex characteristics
SSI Sliding scale insulin
SSKI potassium iodide solution
SSPE subacute sclerosing panencephalitis
ssRNA single-stranded RNA
SSRI selective serotonin reuptake inhibitor
SSSS staphylococcal scalded skin syndrome
SSS sick sinus syndrome
ST heat stable
speech therapy
Staph. Staphylococcus
STD sexually transmitted disease
stat immediately (from Latin statim)
STEC Shiga toxin–producing Escherichia coli (another name for enterohemorrhagic E. coli)
STEMI ST elevation myocardial infarction
STH somatotropic hormone
STI sexually transmitted infection
soft tissue injury
STN Subthalamic nucleus
STNR symmetrical tonic neck reflex
STOP Surgical termination of pregnancy (sometimes suction termination of pregnancy)
STS serological test for syphilis
Subq subcutaneous
Supp suppository
SUV Standardized Uptake Value—when used in positron emission tomography (PET) cancer scans—any lesion seen on a scan with a SUV of more than 3 indicates metabolic activity
SV seminal vesicle
stroke volume
SVC superior vena cava
SVD spontaneous vaginal delivery
simple vertex delivery
SVG Saphenous vein graft
SVI systemic viral infection
SVN small volume nebulizer
SVR systemic vascular resistance
SVT supraventricular tachycardia
SW Sturge–Weber syndrome
Sx surgery
SXA single-energy X-ray absorptiometer
SXR skull x-ray
Sz seizure
Medical abbreviations
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