| ABBREVIATION |
MEANING |
| Hb |
Hemoglobin |
| HCG |
Human chorionic gonadotropin |
| HCI |
Hydrochloric acid, hydrochloride |
| HCO3 |
Bicarbonate |
| HCT |
Hematocrit |
| HDL |
High-density lipoprotein |
| HDN |
Hemolytic disease of the newborn |
| Hg |
Mercury |
| Hgb |
Hemoglobin |
| HGH |
Human growth hormone |
| HI |
Hemagglutination inhibition |
| HLA |
Human leukocyte antigen |
| HR |
Heart rate |
| Hr |
Hour |
| h.s. |
At bedtime, hour of sleep |
| Hx |
History |
| Hz |
Hertz (cycles per second) |
| IABP |
Intra-aortic balloon pump |
| ICF |
Intracellular fluid |
| ICS |
Intercostal space |
| ICU |
Intensive care unit |
| IgA |
Immunoglobulin A |
| IgD |
Immunoglobulin |
| IgE |
Immunoglobulin |
| IgG |
Immunoglobulin |
| IgM |
Immunoglobulin |
| IHSS |
idiopathic hypertrophic subaortic stenosis |
| I.M. |
Intramuscular |
| inf |
Inferior |
| inj |
Inject |
| I&O |
Intake and output |
| IPPB |
Intermittent positive-pressure breathing |
| IU |
International unit |
| IUD |
Intrauterine device |
| I.V. |
Intravenous |
| IVP |
Intravenous pyelogram |
| IVU |
Intravenous urography |
| JRA |
Juvenile rheumatoid arthritis |
