prerenaladj.
/ˌpriːˈriːnl/, U.S. /priˈrin(ə)l/ Anatomy and Medicine.
1. Situated anterior or superior to the kidney or (more usually) to the junction of the vena cava with the renal vein.
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1890 Cent. Dict. Prerenal, situated in advance of the kidney.
1929 Q. Rev. Biol 4 185/1 (caption) The present writer has taken the liberty to modify the right side of the figure to the extent of showing the prerenal V. ca. p. of the original as a new formation labelled V. thl..
1976 Pediatr. Radiol. 14 167 Calcified thrombi in the prerenal (suprarenal) segment of the inferior vena have a characteristic radiographic appearance.
2000 Radiographics 20 639 A left IVC [= inferior vena cava] typically ends at the left renal vein, which crosses anterior to the aorta to form a normal right-sided prerenal IVC.
2. Occurring proximal to, or before reaching, the kidney; spec. designating disorders caused by abnormality of the blood supply to the kidney.
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1911 Lancet 6 May 1205/1 The causes of albuminuria might be classified..into pre-renal, renal, and post-renal.
1949 H. W. C. Vines Green's Man. Pathol. (ed. 17) xxxiii. 911 It would seem probable that the reason why salt and water are not excreted is because they have been lost into the tissues before reaching the kidney, the theory of ‘pre-renal deviation’.
1968 New Eng. Jrnl. Med. 29 Feb. 470/2 Alterations in composition and volume of urine reflected more nearly alterations in intrinsic renal function without the imposition of prerenal variables such as changes in the volume and electrolyte composition of extracellular fluid.
1991 Brit. Med. Jrnl. 16 Mar. 651/2 An effective laboratory test for distinguishing prerenal azotaemia from acute renal failure is the fractional excretion of sodium.
This entry has been updated (OED Third Edition, March 2007; most recently modified version published online March 2022).
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adj.1890