Impaired renal concentrating ability in hypothyroid man. 1976

C A Vaamonde, and U F Michael, and J R Oster, and M J Sebastianelli, and L S Vaamonde, and E L Klingler, and S Papper

The renal concentrating ability was studied in ten patients with hypothyroidism and in 15 euthyroid controls. Solute-free water reabsorption was reduced in the patients with myxedema (4.2 +/- 0.3 ml/min: controls 5.8 +/- 0.6 ml/min; p less than 0.01). This defect was apparent at high rates of solute excretion, and was associated with enhanced excretion of sodium (p less than 0.01) despite a decreased filtered load (p less than 0.005). The myxedema patients had a modest reduction in maximal urine osmolality (p less than 0.04), which was entirely attributable to the lower values observed in younger patients. The results may be explained best by decreased sodium chloride reabsorption in the ascending limb of Henle's loop and/or diminished permeability of the distal nephron in myxedema.

UI MeSH Term Description Entries
D007037 Hypothyroidism A syndrome that results from abnormally low secretion of THYROID HORMONES from the THYROID GLAND, leading to a decrease in BASAL METABOLIC RATE. In its most severe form, there is accumulation of MUCOPOLYSACCHARIDES in the SKIN and EDEMA, known as MYXEDEMA. It may be primary or secondary due to other pituitary disease, or hypothalamic dysfunction. Central Hypothyroidism,Primary Hypothyroidism,Secondary Hypothyroidism,TSH Deficiency,Thyroid-Stimulating Hormone Deficiency,Central Hypothyroidisms,Deficiency, TSH,Deficiency, Thyroid-Stimulating Hormone,Hormone Deficiency, Thyroid-Stimulating,Hypothyroidism, Central,Hypothyroidism, Primary,Hypothyroidism, Secondary,Hypothyroidisms,Primary Hypothyroidisms,Secondary Hypothyroidisms,TSH Deficiencies,Thyroid Stimulating Hormone Deficiency,Thyroid-Stimulating Hormone Deficiencies
D007671 Kidney Concentrating Ability The ability of the kidney to excrete in the urine high concentrations of solutes from the blood plasma. Urine Concentrating Ability,Abilities, Kidney Concentrating,Abilities, Urine Concentrating,Ability, Kidney Concentrating,Ability, Urine Concentrating,Concentrating Abilities, Kidney,Concentrating Abilities, Urine,Concentrating Ability, Kidney,Concentrating Ability, Urine,Kidney Concentrating Abilities,Urine Concentrating Abilities
D007684 Kidney Tubules Long convoluted tubules in the nephrons. They collect filtrate from blood passing through the KIDNEY GLOMERULUS and process this filtrate into URINE. Each renal tubule consists of a BOWMAN CAPSULE; PROXIMAL KIDNEY TUBULE; LOOP OF HENLE; DISTAL KIDNEY TUBULE; and KIDNEY COLLECTING DUCT leading to the central cavity of the kidney (KIDNEY PELVIS) that connects to the URETER. Kidney Tubule,Tubule, Kidney,Tubules, Kidney
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009230 Myxedema A condition characterized by a dry, waxy type of swelling (EDEMA) with abnormal deposits of MUCOPOLYSACCHARIDES in the SKIN and other tissues. It is caused by a deficiency of THYROID HORMONES. The skin becomes puffy around the eyes and on the cheeks. The face is dull and expressionless with thickened nose and lips. Myxedemas
D009318 Natriuresis Sodium excretion by URINATION. Natriureses
D009994 Osmolar Concentration The concentration of osmotically active particles in solution expressed in terms of osmoles of solute per liter of solution. Osmolality is expressed in terms of osmoles of solute per kilogram of solvent. Ionic Strength,Osmolality,Osmolarity,Concentration, Osmolar,Concentrations, Osmolar,Ionic Strengths,Osmolalities,Osmolar Concentrations,Osmolarities,Strength, Ionic,Strengths, Ionic
D005260 Female Females
D005919 Glomerular Filtration Rate The volume of water filtered out of plasma through glomerular capillary walls into Bowman's capsules per unit of time. It is considered to be equivalent to INULIN clearance. Filtration Rate, Glomerular,Filtration Rates, Glomerular,Glomerular Filtration Rates,Rate, Glomerular Filtration,Rates, Glomerular Filtration

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