Internal Medicine Abbreviations

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Internal Medicine Alphabet – I

S. No	Abbreviation	Full Form	Short Explanation	Practical Example
I001	ICU	Intensive Care Unit	Specialized hospital unit for critically ill patients requiring close monitoring.	A patient with septic shock is admitted to the ICU.
I002	IM	Internal Medicine	Medical specialty dealing with adult diseases and complex conditions.	An internist specializes in IM.
I003	ID	Infectious Diseases	Subspecialty focusing on bacterial, viral, fungal, and parasitic infections.	ID doctors treat HIV, TB, and malaria.
I004	IBD	Inflammatory Bowel Disease	Chronic inflammatory conditions of the intestine like Crohn’s and ulcerative colitis.	A patient with bloody diarrhea may have IBD.
I005	IBS	Irritable Bowel Syndrome	Functional gastrointestinal disorder causing abdominal pain and altered bowel habits.	Stress often worsens IBS symptoms.
I006	IHD	Ischemic Heart Disease	Narrowing of coronary arteries leading to reduced blood supply to the heart.	Angina is a sign of IHD.
I007	INR	International Normalized Ratio	Blood test measuring clotting tendency, often for patients on warfarin.	INR is monitored in atrial fibrillation patients.
I008	IR	Interventional Radiology	Medical specialty using imaging-guided minimally invasive procedures.	IR performs angioplasty and stent placements.
I009	IV	Intravenous	Administration of fluids or drugs directly into a vein.	IV antibiotics are given for severe infections.
I010	IVC	Inferior Vena Cava	Large vein that carries deoxygenated blood from the lower body to the heart.	IVC filters are used in DVT cases.
I011	Ig	Immunoglobulin	Antibodies produced by plasma cells for immune defense.	IgG provides long-term immunity.
I012	IgA	Immunoglobulin A	Antibody found in mucosal areas like gut and respiratory tract.	IgA deficiency causes recurrent infections.
I013	IgE	Immunoglobulin E	Antibody involved in allergic reactions and asthma.	High IgE indicates allergy or parasitic infection.
I014	IgG	Immunoglobulin G	Most abundant antibody, provides long-term immunity.	IgG persists after vaccination.
I015	IgM	Immunoglobulin M	First antibody produced during infection.	IgM positive test indicates recent infection.
I016	ILD	Interstitial Lung Disease	Group of lung disorders causing scarring of lung tissue.	ILD patients may present with dry cough and dyspnea.
I017	IMI	Inferior Myocardial Infarction	Heart attack involving the inferior wall of the heart.	ECG shows ST elevation in inferior leads.
I018	IOP	Intraocular Pressure	Pressure within the eye, important in glaucoma diagnosis.	High IOP can damage the optic nerve.
I019	IPF	Idiopathic Pulmonary Fibrosis	Chronic lung disease with progressive scarring.	Patient presents with dry cough and clubbing.
I020	IRIS	Immune Reconstitution Inflammatory Syndrome	Exaggerated immune response after starting ART in HIV patients.	Seen in TB/HIV co-infections.
I021	ITU	Intensive Therapy Unit	Another term for ICU in some countries.	Patient with septicemia shifted to ITU.
I022	IVIG	Intravenous Immunoglobulin	Therapy using pooled antibodies for immune deficiencies and autoimmune diseases.	IVIG is given in Guillain-Barré Syndrome.
I023	IVCF	Inferior Vena Cava Filter	Device placed in IVC to prevent pulmonary embolism from DVT.	IVCF used in recurrent embolism cases.
I024	IBDU	Inflammatory Bowel Disease, Unclassified	IBD cases not clearly Crohn’s or ulcerative colitis.	IBDU diagnosed when biopsy is inconclusive.
I025	ITP	Immune Thrombocytopenic Purpura	Autoimmune disorder causing low platelets.	Child presents with bruises and low platelet count.
I026	IHDL	Isolated High-Density Lipoprotein	Elevated HDL cholesterol, often protective.	High IHDL reduces risk of heart disease.
I027	IGT	Impaired Glucose Tolerance	Pre-diabetic condition with abnormal glucose response.	IGT patients have increased risk of diabetes.
I028	IMC	Intermediate Care	Hospital unit between general ward and ICU.	Post-op patients may be admitted to IMC.
I029	IMA	Inferior Mesenteric Artery	Artery supplying blood to the large intestine.	IMA block can cause bowel ischemia.
I030	IRF	Immune Response Factor	General term for proteins regulating immune response.	Interleukins act as IRFs.
I031	ICAM	Intercellular Adhesion Molecule	Protein involved in immune cell migration.	ICAMs play role in inflammation.
I032	IVCM	Intravenous Contrast Medium	Contrast dye used in radiological imaging.	IVCM enhances CT scan clarity.
I033	IA	Intra-Arterial	Administration directly into an artery.	IA chemotherapy given in liver cancer.
I034	IAH	Intra-Abdominal Hypertension	Elevated abdominal pressure affecting organ function.	Severe pancreatitis may cause IAH.
I035	ICP	Intracranial Pressure	Pressure within skull affecting brain function.	Raised ICP seen in head injury.
I036	IMN	Immunology	Branch of medicine studying immune system disorders.	IMN doctors manage autoimmune diseases.
I037	IRD	Infectious and Rare Diseases	Category covering unusual infectious diseases.	CDC tracks IRD outbreaks.
I038	IS	Immunosuppressant	Drugs suppressing immune system, often in transplants.	Cyclosporine is an IS drug.
I039	ISCHEM	Ischemia	Insufficient blood flow to tissues causing hypoxia.	Chest pain occurs in myocardial ischemia.
I040	IAI	Intra-Abdominal Infection	Infection within abdominal cavity.	Appendicitis can cause IAI.
I041	IRF	Interstitial Renal Fibrosis	Scarring of kidney tissue leading to chronic kidney disease.	Seen in long-term hypertension patients.
I042	IgD	Immunoglobulin D	Rare antibody, mainly functions in B-cell activation.	IgD is not usually measured in tests.
I043	INH	Isoniazid	Antibiotic used in TB treatment.	INH is first-line therapy for TB.
I044	IOPTH	Intraoperative Parathyroid Hormone	Test during parathyroid surgery to confirm success.	Rapid fall in IOPTH indicates removal success.
I045	INOCA	Ischemia with Non-Obstructive Coronary Arteries	Condition where angina occurs without coronary blockage.	INOCA may need functional testing.
I046	ICM	Ischemic Cardiomyopathy	Heart failure caused by long-standing ischemia.	Seen in patients with multiple MIs.
I047	IDDM	Insulin-Dependent Diabetes Mellitus	Old term for Type 1 Diabetes.	Child requiring insulin has IDDM.
I048	IFG	Impaired Fasting Glucose	Pre-diabetic state with abnormal fasting glucose.	IFG is detected during blood test.
I049	ISF	Interstitial Fluid	Fluid around body’s cells important in nutrient transport.	ISF swelling seen in edema.
I050	IHDN	Ischemic Heart Disease Non-STEMI	Heart attack without ST elevation on ECG.	IHDN diagnosed with biomarkers and ECG.
I051	ICMV	Invasive Cytomegalovirus	Severe CMV infection in immunocompromised patients.	Seen in transplant recipients.
I052	IAHF	International Association of Health Federations	Global medical collaboration body.	Organizes medical conferences worldwide.
I053	IBDP	Inflammatory Bowel Disease Program	Specialized hospital program for IBD care.	Multidisciplinary team runs IBDP.
I054	ICA	Internal Carotid Artery	Major artery supplying blood to the brain.	Stroke may occur due to ICA blockage.
I055	ILI	Influenza-Like Illness	Symptom cluster resembling flu.	Reportable condition during epidemics.
I056	ICF	Intracellular Fluid	Fluid inside body cells.	Major component of total body water.
I057	ICD	Implantable Cardioverter Defibrillator	Device implanted to prevent sudden cardiac death.	ICD shocks patients during arrhythmias.
I058	IVP	Intravenous Pyelogram	Imaging test of urinary tract using contrast.	IVP detects kidney stones.
I059	ITN	Insecticide-Treated Net	Used to prevent mosquito-borne diseases.	ITN reduces malaria transmission.
I060	IAHC	International Association for Healthcare Communication	Organization for medical communication standards.	Publishes health communication guidelines.
I061	IHC	Immunohistochemistry	Lab technique detecting antigens in tissues using antibodies.	IHC used in cancer diagnosis.
I062	IRD	Inherited Retinal Disease	Group of genetic disorders affecting vision.	Retinitis pigmentosa is an IRD.
I063	IHDx	Ischemic Heart Disease Diagnosis	Clinical work-up for diagnosing ischemia.	ECG and angiography are part of IHDx.
I064	ILS	Intermediate Lymphocyte Syndrome	Transitional immune disorder.	Seen in some viral infections.
I065	IVCI	Inferior Vena Cava Involvement	Spread of disease into IVC.	Tumor thrombus may cause IVCI.
I066	IAHO	International Association of Hospital Organizations	Healthcare body for hospital standards.	Publishes hospital safety protocols.
I067	IVO	Intravenous Oncology	Chemotherapy delivered IV.	IVO is common in cancer hospitals.
I068	ICMP	Ischemic Cardiomyopathy Patient	Patient cohort classification.	ICMP studied in clinical trials.
I069	ISM	Indolent Systemic Mastocytosis	Rare mast cell disorder.	ISM causes flushing and GI symptoms.
I070	IOL	Intraocular Lens	Artificial lens implanted after cataract removal.	IOL restores vision.
I071	IMV	Invasive Mechanical Ventilation	Life-support technique delivering oxygen via endotracheal tube.	IMV is used in ARDS patients.
I072	IABP	Intra-Aortic Balloon Pump	Device supporting heart in cardiogenic shock.	IABP increases coronary perfusion.
I073	ICG	Indocyanine Green	Dye used in diagnostic imaging.	ICG angiography assesses liver function.
I074	IAIH	Idiopathic Autoimmune Hepatitis	Chronic liver disease due to autoimmunity.	Treated with steroids and immunosuppressants.
I075	IL	Interleukin	Group of cytokines involved in immune regulation.	IL-6 is elevated in inflammation.
I076	INRx	Internal Medicine Prescription	Refers to medicines prescribed by internists.	INRx often includes antihypertensives.
I077	ISA	Ischemic Stroke Acute	Early phase of ischemic stroke.	ISA confirmed by CT/MRI.
I078	ISCHEMIC	Ischemic	Reduced blood supply to tissues.	Leg pain in peripheral ischemia.
I079	IP	Inpatient	Patient admitted to hospital.	Surgery cases often require IP care.
I080	IRP	Internal Medicine Residency Program	Training program for internists.	Doctors apply for IRP after medical school.
I081	ICUA	Intensive Care Unit Admission	Refers to patients admitted to ICU.	Sepsis cases require ICUA.
I082	IDA	Iron Deficiency Anemia	Anemia caused by low iron levels.	IDA common in women with heavy menstruation.
I083	ISA	Inhaled Short-Acting	Refers to short-acting inhalers for asthma/COPD.	Albuterol is an ISA drug.
I084	ICR	Immediate Cardiac Resuscitation	Emergency revival procedure.	ICR performed after cardiac arrest.
I085	ILD	Immune-Linked Disorder	Any disease linked with immune dysregulation.	Lupus is an ILD.
I086	IOM	Institute of Medicine	US-based medical research organization.	IOM sets health policy standards.
I087	IHA	Idiopathic Hypereosinophilic Syndrome	Rare blood disorder with high eosinophils.	IHA causes organ damage.
I088	IMID	Immune-Mediated Inflammatory Disease	Group of autoimmune conditions.	Rheumatoid arthritis is an IMID.
I089	ISICU	Isolation ICU	Specialized ICU for infectious patients.	COVID-19 patients treated in ISICU.
I090	IEM	Inborn Errors of Metabolism	Genetic disorders affecting metabolism.	PKU is an IEM.
I091	ISQ	Intramuscular Subcutaneous	Injection route involving both layers.	Some vaccines given ISQ.
I092	IPN	Isolated Peripheral Neuropathy	Nerve damage affecting one area.	Diabetic patients may have IPN.
I093	IOLC	Intraocular Lens Complication	Problems after lens implant surgery.	IOLC includes lens dislocation.
I094	IAD	Infectious Aortic Disease	Infection involving the aorta.	Mycotic aneurysm is an IAD.
I095	IGC	Intermediate Grade Carcinoma	Cancer of moderate aggressiveness.	Breast IGC managed with chemo.
I096	ICH	Intracerebral Hemorrhage	Stroke due to bleeding in the brain.	ICH seen in hypertensive crisis.
I097	ITPN	Intraductal Tubulopapillary Neoplasm	Rare pancreatic tumor.	Diagnosed via imaging.
I098	IAF	Intra-Abdominal Fluid	Free fluid in abdomen, often ascites.	IAF seen in cirrhosis.
I099	ICUS	Idiopathic Cytopenia of Unknown Significance	Unexplained low blood counts without malignancy.	ICUS may progress to leukemia.
I100	IHI	Institute for Healthcare Improvement	Organization focused on improving patient safety and care.	IHI develops hospital quality guidelines.

S. No	Abbreviation	Full Form	Short Explanation	Practical Example
I101	IDR	Insulin Dose Requirement	Daily insulin dose needed for glycemic control.	Adjusted in type 1 diabetic patients.
I102	IDS	Infectious Disease Specialist	Physician specialized in diagnosing and treating infections.	Consulted for resistant TB cases.
I103	IEI	Inborn Errors of Immunity	Genetic immune deficiencies.	Severe combined immunodeficiency in children.
I104	IFN-γ	Interferon Gamma	Cytokine involved in immune defense.	Used in IGRA tests for TB.
I105	IGD	Immunoglobulin D	Rare antibody type, role in B-cell activation.	Detected in some myeloma cases.
I106	IGG4-RD	IgG4-Related Disease	Chronic immune-mediated condition with organ swelling.	Mimics pancreatic cancer.
I107	IHC	Immunohistochemistry	Lab technique using antibodies to detect antigens in tissue.	ER/PR testing in breast cancer.
I108	IJV	Internal Jugular Vein	Major vein in the neck used for central line placement.	Accessed in ICU patients.
I109	ILAE	International League Against Epilepsy	Global organization for epilepsy research.	Defines seizure classifications.
I110	IL-1	Interleukin-1	Pro-inflammatory cytokine.	Elevated in rheumatoid arthritis.
I111	IL-2	Interleukin-2	Cytokine that stimulates T-cell growth.	Used in immunotherapy.
I112	IL-6	Interleukin-6	Cytokine elevated in inflammation and sepsis.	Targeted by tocilizumab.
I113	ILR	Implantable Loop Recorder	Device for continuous ECG monitoring.	Detects unexplained syncope.
I114	IMD	Inherited Metabolic Disorder	Genetic disorders affecting metabolism.	Phenylketonuria screening in newborns.
I115	IMI	Intramyocardial Infarction	Infarction involving heart muscle.	Subtype of myocardial infarction.
I116	IMPDH	Inosine Monophosphate Dehydrogenase	Enzyme inhibited by immunosuppressants.	Target of mycophenolate.
I117	IMRT	Intensity-Modulated Radiation Therapy	Advanced form of radiation treatment.	Used in head and neck cancers.
I118	IND	Investigational New Drug	FDA status for experimental drugs.	Clinical trial applications.
I119	INF	Infliximab	Monoclonal antibody against TNF-α.	Used in Crohn’s disease.
I120	INO	Intraocular Neoplasm	Tumor inside the eye.	Retinoblastoma in children.
I121	INPH	Idiopathic Normal Pressure Hydrocephalus	Dementia with gait and urinary issues.	Treated with ventriculoperitoneal shunt.
I122	INRs	International Normalized Ratios	Serial INR values to monitor anticoagulation.	Adjusted warfarin therapy.
I123	IOI	Idiopathic Orbital Inflammation	Inflammatory disorder of orbit without known cause.	Mimics orbital cellulitis.
I124	IOPTH	Intraoperative Parathyroid Hormone	Monitored during parathyroid surgery.	Confirms adenoma removal.
I125	IPF1	Insulin Promoter Factor 1	Gene regulating insulin expression.	Mutation linked to MODY diabetes.
I126	IPM	Imipenem	Broad-spectrum carbapenem antibiotic.	Used in severe infections.
I127	IPN	Interpeduncular Nucleus	Brain structure involved in pain and reward pathways.	Studied in neuroimaging.
I128	IPO	Intraoperative Positioning	Patient positioning during surgery.	Prevents nerve injury.
I129	IPPV	Intermittent Positive Pressure Ventilation	Ventilation mode delivering positive pressure breaths.	Used in anesthetic practice.
I130	IPTp	Intermittent Preventive Therapy in Pregnancy	Malaria prevention in endemic regions.	WHO-recommended with SP drug.
I131	IQ	Intelligence Quotient	Measure of cognitive ability.	Neurocognitive testing after stroke.
I132	IRD	Immune Reconstitution Disease	Similar to IRIS after ART initiation.	Seen in HIV patients.
I133	IRF	Intermediate Renal Failure	Stage between mild and end-stage kidney disease.	Managed with strict BP control.
I134	IRIS	Irisin	Hormone released during exercise affecting metabolism.	Studied in obesity.
I135	IRP	Iron Regulatory Protein	Protein regulating iron metabolism.	Implicated in iron overload disorders.
I136	IRS	Insulin Receptor Substrate	Mediator of insulin signaling pathway.	Defective in insulin resistance.
I137	IRT	Immunoreactive Trypsinogen	Newborn screening marker for cystic fibrosis.	Positive infants undergo genetic testing.
I138	ISAT	International Subarachnoid Aneurysm Trial	Landmark trial comparing aneurysm treatments.	Guided use of coiling vs clipping.
I139	ISBT	International Society of Blood Transfusion	Governing body for transfusion standards.	Defines blood group nomenclature.
I140	ISH	In Situ Hybridization	Lab technique to localize DNA/RNA in tissue.	Used in cancer diagnosis.
I141	ISICEM	International Symposium on Intensive Care & Emergency Medicine	Prestigious conference in critical care.	ICU doctors attend yearly.
I142	ISOE	International Society for Occupational Ergonomics	Focuses on ergonomics and occupational health.	Publishes workplace safety standards.
I143	ISPAD	International Society for Pediatric and Adolescent Diabetes	Pediatric diabetes society.	Publishes diabetes care guidelines.
I144	ISQ	Insulin Sensitivity Quotient	Calculation to assess insulin sensitivity.	Used in metabolic studies.
I145	ISR	In-Stent Restenosis	Re-narrowing of artery after stent placement.	Treated with repeat angioplasty.
I146	ISS	Injury Severity Score	Trauma scoring system.	Guides management in polytrauma patients.
I147	ITA	Internal Thoracic Artery	Commonly used in coronary bypass surgery.	Left ITA graft for LAD disease.
I148	ITB	Intrathecal Baclofen	Spinal administration of baclofen for spasticity.	Used in multiple sclerosis.
I149	ITGA	Integrin Alpha	Protein involved in cell adhesion.	Studied in cancer progression.
I150	ITLC	Instant Thin Layer Chromatography	Technique to check drug purity.	Used in nuclear medicine.
I151	ITM	Intrathecal Morphine	Strong analgesia for surgical patients.	Used in C-section anesthesia.
I152	ITN	Insecticide-Treated Net	Malaria-prevention tool.	Distributed in Africa.
I153	ITPA	Inosine Triphosphate Pyrophosphatase	Enzyme linked to drug metabolism.	Deficiency affects thiopurine tolerance.
I154	ITR	Inhaled Treprostinil	Drug for pulmonary hypertension.	Improves exercise tolerance.
I155	ITT	Intention-To-Treat	Statistical analysis including all randomized subjects.	Common in RCTs.
I156	IU	International Unit	Standardized unit for biologic substances.	IU used for vitamin D measurement.
I157	IUD	Intrauterine Device	Contraceptive device placed in uterus.	Copper IUD for long-term contraception.
I158	IUG	Intrauterine Gestation	Pregnancy within uterus.	Confirmed on ultrasound.
I159	IUP	Intrauterine Pregnancy	Normal pregnancy within uterus.	Differentiated from ectopic pregnancy.
I160	IUS	Intrauterine System	Hormonal IUD releasing progestin.	Mirena is a common brand.
I161	IVCF	Inferior Vena Cava Filter	Device to prevent pulmonary embolism.	Inserted in recurrent DVT.
I162	IVI	Intravitreal Injection	Injection into the vitreous cavity of the eye.	Used for anti-VEGF therapy.
I163	IVP	Intravenous Push	Rapid IV administration of medication.	IVP of furosemide in emergency.
I164	IVR	Intravenous Regional Anesthesia	Anesthesia technique using tourniquet and IV anesthetic.	Used in minor limb surgeries.
I165	IVS	Interventricular Septum	Wall separating left and right ventricles.	Hypertrophy seen in HCM.
I166	IVSD	Interventricular Septal Defect	Congenital hole in septum.	Repaired surgically.
I167	IVT	Intravitreal Therapy	Drug injection into eye cavity.	Common in age-related macular degeneration.
I168	IWMI	Inferior Wall Myocardial Infarction	MI involving inferior heart wall.	ECG changes in leads II, III, aVF.
I169	IWR	Insulin Withdrawal Reaction	Hypoglycemia following abrupt insulin withdrawal.	Seen in brittle diabetes.
I170	IX	Cranial Nerve IX (Glossopharyngeal)	Nerve responsible for swallowing and taste.	Tested in neurological exams.
I171	I-131	Iodine-131	Radioactive isotope for thyroid imaging/treatment.	Used in hyperthyroidism and thyroid cancer.
I172	I-123	Iodine-123	Radioisotope for thyroid scans.	Preferred for diagnostic use.
I173	I-125	Iodine-125	Radioisotope used in brachytherapy.	Prostate cancer treatment.
I174	IHCY	Intravenous High-Dose Cyclophosphamide	Strong immunosuppressive therapy.	Used in refractory autoimmune diseases.
I175	IML	Intermediate Monocyte Level	Lab marker in infections/inflammation.	Measured in CBC differential.
I176	INDC	Inherited Neurometabolic Disorder Classification	Classification system for metabolic diseases.	Used in research.
I177	INS	Insulin	Hormone regulating blood glucose.	Injected in diabetes mellitus.
I178	INSR	Insulin Receptor	Receptor that binds insulin and triggers signaling.	Mutations cause severe insulin resistance.
I179	INT	Intussusception	Intestinal telescoping causing obstruction.	Emergency in pediatrics.
I180	INVEGA	Paliperidone	Antipsychotic drug.	Used in schizophrenia management.
I181	IOPN	Intraductal Oncocytic Papillary Neoplasm	Rare pancreatic tumor.	Managed surgically.
I182	IOPA	Intraoral Periapical	Dental X-ray technique.	Detects periapical infections.
I183	IOPM	Intraoperative Monitoring	Real-time monitoring during surgery.	Prevents neural injury.
I184	IPEC	Inpatient Palliative Care	Hospital-based palliative care services.	Provided in advanced cancer.
I185	IRF5	Interferon Regulatory Factor 5	Gene regulating immune response.	Linked to lupus.
I186	IRF7	Interferon Regulatory Factor 7	Key regulator of antiviral immunity.	Activated in viral infections.
I187	IRF8	Interferon Regulatory Factor 8	Gene involved in hematopoiesis.	Implicated in leukemia.
I188	IRR	Incidence Rate Ratio	Epidemiological measure comparing disease incidence.	Used in cohort studies.
I189	IRS-1	Insulin Receptor Substrate 1	Protein transmitting insulin signal.	Mutations linked to diabetes.
I190	IRS-2	Insulin Receptor Substrate 2	Another insulin signaling protein.	Involved in hepatic glucose metabolism.
I191	ISAT	Intravenous Sodium Acetate Therapy	Used to correct acidosis.	Administered in metabolic acidosis.
I192	ISFET	Ion-Sensitive Field Effect Transistor	Biosensor for pH/glucose detection.	Used in lab-on-chip devices.
I193	ISI	Insulin Sensitivity Index	Indicator of insulin resistance.	Calculated from clamp studies.
I194	ISM	Indolent Systemic Mastocytosis	Rare hematologic disease with mast cell proliferation.	Diagnosed via bone marrow biopsy.
I195	ISP	Inspiratory Splinting Phenomenon	Altered breathing due to pain.	Seen in rib fractures.
I196	ISR	Insulin Secretion Rate	Rate of insulin release from pancreas.	Measured in metabolic studies.
I197	ISSNHL	Idiopathic Sudden Sensorineural Hearing Loss	Sudden unexplained hearing loss.	Treated with steroids.
I198	ITGB	Integrin Beta	Cell adhesion protein family.	Implicated in cancer metastasis.
I199	ITT	Insulin Tolerance Test	Endocrine test for pituitary/adrenal function.	Used in GH deficiency evaluation.
I200	IVC-US	Inferior Vena Cava Ultrasound	Bedside ultrasound to assess volume status.	Used in ICU resuscitation.