List of medical abbreviations: S

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swithout (s with a bar over it) (from Latin sine)
surgery (though deemed by some as inappropriate)
S1first heart sound
S2second heart sound
S3third heart sound
S4fourth heart sound
SAsinoatrial node
SAAGserum–ascites albumin gradient
SABstaphylococcal bacteremia
spontaneous abortion (that is, miscarriage)
SAHsubarachnoid hemorrhage
SAMsystolic anterior motion of the mitral valve
SANsinoatrial node
SAPS IIsimplified acute physiology score
SAPS IIIsimplified acute physiology score
SARSeasonal Allergic Rhinitis
SARSsevere acute respiratory syndrome
SBsmall bowel (see small intestine)
SBEsubacute bacterial endocarditis
SBFTsmall bowel follow through
SBMAspinal bulbar muscular atrophy
SBOsmall bowel obstruction
SBPsystolic blood pressure
spontaneous bacterial peritonitis
SBRTStereostatic Body Radiation Therapy
s.c.subcutaneous (from Latin subcutis)
SCASpinocerebellar ataxia
SCCsquamous cell carcinoma
SCDsudden cardiac death
SCDSequential compression device
SCDSickle Cell Disease
SCLCsmall cell lung cancer
SCIDsevere combined immunodeficiency
SCIWORAspinal cord injury without radiographic abnormality
scopemicroscope or endoscope
standard deviation
SDHsubdural hematoma
SDTIsuspected deep tissue injury
SEside effect
Sedsedimentation (rate) (see erythrocyte sedimentation rate)
SEEsyphilis elimination effort
Segssegmented cells
SEMsystolic ejection murmur (see heart murmur)
SERMselective estrogen receptor modulator
SERTserotonin transporter
SFAsuperficial femoral artery
serum folic acid
SGAsmall for gestational age
SG cathSwan–Ganz catheter (see pulmonary artery catheter)
SGSpecific Gravity (in Urinanalysis)
SGBStellate ganglion Block
SGOTserum glutamic oxaloacetic transaminase
SGPTserum glutamic pyruvic transaminase
social history (personal habits, living situation, job)
SHBGsex hormone-binding globulin
shobshortness of breath (see dyspnea)
SHPTSecondary Hyperparathyroidism
SHxsurgical history
SIInternational System of Units
suicidal ideation
seriously ill
sacroiliac (joint)
SIADHsyndrome of inappropriate antidiuretic hormone
SICUsurgical intensive care unit
SIBOsmall intestinal bacterial overgrowth
SIDSemel in die meaning once daily. Only used in veterinary medicine.
SIDSsudden infant death syndrome
SILsquamous intraepithelial lesion
SIMVsynchronized intermittent mechanical ventilation
si op. sitif needed (from Latin si opus sit)
SIRSsystemic inflammatory response syndrome
SITstress inoculation training (see posttraumatic stress disorder)
SJSStevens–Johnson syndrome
SLEsystemic lupus erythematosus
SLEVSt. Louis virus
Sentinel Lymph node biopsy
SLRstraight leg raise (see Lasègue's sign)
SLLsmall lymphocytic lymphoma
SLPSpeech-language pathologist
SMmultiple sclerosis (from Latin sclerosis multiplex)
SMAsequential multiple analysis
superior mesenteric artery
spinal muscle atrophy
SMA-6six-channel serum multiple analysis
SMA-7serum metabolic assay
SMNstatement of medical necessity
SMSsenior medical student
SMTspinal manipulative therapy
SMVsuperior mesenteric vein
SNstudent nurse ;
skilled nursing
SNBsentinel node biopsy (ductal carcinoma)
SNFSkilled Nursing Facility
SNPsodium nitroprusside;
single nucleotide polymorphism
SNRIserotonin–norepinephrine reuptake inhibitor
SNVsin nombre virus (the most common type of hantavirus)
SOAswelling of ankles
SOAPsubjective, objective, assessment, plan (how physicians’ notes may be organized)
SOBshortness of breath (see dyspnea)
SOBOEshortness of breath on exertion
SOLspace-occupying lesion
SOOBsend out of bed
sitting out of bed
SOSif needed (from Latin si opus sit)
status post
SPEstreptococcal pyrogenic exotoxin
SPECTsingle-photon emission computed tomography
SPEPserum protein electrophoresis
SPETsingle-photon emission tomography
Sp. fl.spinal fluid (see cerebrospinal fluid)
Sp. gr.specific gravity
SPSsingle point (walking) stick
SRslow release (see also time release technology (medicine))
SROMspontaneous rupture of membranes
SRSstereotactic radiotherapy
SRUShock Resuscitation Unit
SSHemoglobin SS (HbSS) (see in sickle-cell disease = SS disease)
S/Ssigns & symptoms
SSCsecondary sex characteristics
SSEsterile speculum exam
SSISliding scale insulin
SSKIpotassium iodide solution
SSPEsubacute sclerosing panencephalitis
ssRNAsingle-stranded RNA
SSRIselective serotonin reuptake inhibitor
SSSIskin and skin structure infection (also referred to as acute bacterial skin and skin structure infection - ABSSSI)
SSSSstaphylococcal scalded skin syndrome
SSSsick sinus syndrome
STsore throat
speech therapy
STDsexually transmitted disease
statimmediately (from Latin statim)
STECShiga toxin–producing Escherichia coli (another name for enterohemorrhagic E. coli)
STEMIST elevation myocardial infarction
STHsomatotropic hormone
STIsexually transmitted infection
soft tissue injury
STNSubthalamic nucleus
STNRsymmetrical tonic neck reflex
STOPSurgical termination of pregnancy (sometimes suction termination of pregnancy)
STSserological test for syphilis
SUIstress urinary incontinence
SUVStandardized 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
SVseminal vesicle
stroke volume
SVCsuperior vena cava
SVDspontaneous vaginal delivery
simple vertex delivery
SVEsterile vaginal examination
SVGSaphenous vein graft
SVIsystemic viral infection
SVNsmall volume nebulizer
SVRsystemic vascular resistance
SVTsupraventricular tachycardia
SWSturge–Weber syndrome
SXAsingle-energy X-ray absorptiometer
SXRskull x-ray