| Abbreviation
|
Meaning
|
| L |
leukocytes
lumbar vertebrae (L1 to L5)
|
| L&D |
labor and delivery
|
| LA |
left atrium
lymphadenopathy
local anesthetic
|
| LAAM |
L-alpha-acetylmethadol
|
| Lab |
laboratory (in health care, usually referring to clinical laboratory)
|
| LABA |
long-acting beta agonist
|
| LABBB |
left anterior bundle branch block
|
| Lac |
laceration
lactate
|
| LAD |
left anterior descending (a coronary artery)
leukocyte adhesion deficiency
left axis deviation (see electrocardiogram)
lymphadenopathy
|
| LAE |
left atrial enlargement
|
| LAH |
left anterior hemiblock
|
| LAHB |
left anterior hemiblock
|
| Lam |
laminectomy
|
| LAN |
lymphadenopathy
|
| LAP |
leukocyte alkaline phosphatase
|
| Lap |
laparotomy
|
| Lap appy |
laparoscopic appendectomy
|
| LAR |
low anterior resection
|
| LARP |
left → anterior, right → posterior (path of the vagi as they wander from thorax to abdomen)
|
| LAS |
lymphadenopathy syndrome
|
| Lat |
lateral
|
lb
LB |
pound or pounds (mass)
|
| LBBB |
left bundle branch block
|
| LBO |
large bowel obstruction
|
| LBP |
low back pain
|
| LBW |
low birth weight
|
| LCA |
left coronary artery
|
| LCHAD |
long-chain 3-hydroxyacyl-coenzyme A dehydrogenase
|
| LCIS |
lobular carcinoma in situ
|
| LCM |
lymphocytic meningitis
|
| LCMV |
lymphocytic choriomeningitis virus
|
| LCP |
Liverpool Care Pathway for the Dying Patient
|
| LCPD |
Legg–Calvé–Perthes disease
|
| LCV |
leukocytoclastic vasculitis
|
| LCX |
left circumflex artery
|
| L&D |
labor and delivery
|
| LDH |
lactate dehydrogenase
|
| LDL |
low-density lipoprotein
|
| LDL-C |
low-density lipoprotein cholesterol
|
| L-DOPA |
levo-dihydroxyphenylalanine
|
| LEC |
lupus erythematosus cell
|
| LEEP |
loop electrical excision procedure
|
| LES |
lower esophageal sphincter
lupus erythematosus systemicus
|
| LE |
lupus erythematosus
lower extremity (human leg)
|
| leu |
leukocytes
|
| LFT |
liver function test
|
| LGA |
large for gestational age
|
| LGL |
Lown–Ganong–Levine syndrome
|
| LGM |
lymphogranulomatosis maligna
|
| LGMD |
limb-girdle muscular dystrophy
|
| LGSIL |
low-grade squamous intraepithelial lesion
|
| LGV |
lymphogranuloma venereum
|
| LH |
luteinizing hormone
lightheadedness
|
| LHC |
left heart catheterization
|
| LHRH |
luteinizing hormone–releasing hormone
|
| Lig |
ligament
|
| LIH |
left inguinal hernia
|
| LLD |
leg length discrepancy
|
| LLE |
left lower extremity
|
| LLETZ |
large loop excision of the transformation zone
|
| LLL |
left lower lobe
|
| LLQ |
left lower quadrant
|
| LM |
left main
|
| LMA |
left mentoanterior (fetal position)
laryngeal mask airway
|
| LMCA |
left main coronary artery
|
| LMD |
local medical doctor
|
| LMP |
last menstrual period—first day of the menstrual period
low malignant potential
|
| LMWH |
low-molecular-weight heparin
|
| LN |
lymph node
Logical Observation Identifiers Names and Codes (LOINC)
|
| LND |
lymph node dissection
|
| LNG |
levonorgestrel
|
| LNI |
lymph node involvement
|
| LOA |
left occipitoanterior (fetal position)
level of activity
lysis of adhesions
Loss of Appetite
|
| LOC |
loss of consciousness
level of consciousness (e.g., "altered LOC from head trauma")
|
| LOF |
leakage of fluid
|
| LOH |
loss of heterozygosity
|
| LOI |
loss of imprinting
|
| LOL |
little old lady (often LOL in NAD—see House of God)
lymph-obligatory load
|
| LOM |
limitation of motion
|
| LOP |
left occiput posterior (fetal position)
|
| LORTA |
loss of resistance to air (in anesthesiology; when placing epidural, LORTA indicates entrance of needle to epidural space)
|
| LOS |
length of stay
|
| Lot |
lotion
|
| LOT |
left occiput transverse (fetal position)
|
| Lp |
lipoprotein
|
| LP |
lumbar puncture
|
| LPH |
left posterior hemiblock (see heart block)
|
| LPL |
lipoprotein lipase
|
| LPP |
lichen planopilaris
|
| LQTS |
long QT syndrome
|
| L/S |
lecithin-to-sphingomyelin ratio
|
| LS |
lichen sclerosus
Lynch syndrome
|
| LSA |
lichen sclerosis et atrophicus
|
| LSB |
left sternal border
|
| LSCS |
Lower segment Caesarean section
|
| LSCTA |
lung sounds clear to auscultation
|
| LSIL |
low-grade squamous intraepithelial lesion
|
| LST |
laterally spreading tumor
|
| LR |
lactated Ringer's solution
|
| LRINEC |
Laboratory Risk Indicator for Necrotizing Soft Tissue Infections Score
|
| LRTI |
lower respiratory tract infection
|
| LT |
heat-labile enterotoxin
|
| LTAC |
long-term acute care
|
| LTCS |
low transverse cesarean section
|
| LUL |
left upper lobe (of lung)
|
| LUQ |
left upper quadrant (of abdomen)
|
| LUS |
lower uterine segment
|
| LUTS |
lower urinary tract symptoms
|
| LV |
left ventricle
|
| LVAD |
left ventricular assist device
|
| LVEDP |
left ventricular end diastolic pressure
|
| LVEF |
left ventricular ejection fraction
|
| LVF |
left ventricular failure
|
| LVH |
left ventricular hypertrophy
|
| LVOT |
left ventricular outflow tract
|
| LVNC |
left ventricular noncompaction (see noncompaction cardiomyopathy)
|
| LVP |
Large volume paracentesis
|
| LWBS |
left without being seen
|
| Lx of ch |
laxative of choice
|
| lx investigations
|
| Ly |
lymphocytes
|
| lytes |
electrolytes
|