= Carl W. Gottschalk
{c}
{title2=1922–1997}
<Carl W. Gottschalk> was a researcher in renal <physiology> who used <renal micropuncture> to investigate how the <kidney> handles fluid and concentrates <urine>. Working with <Margaret Mylle>, he developed experiments that connected conditions in individual <renal tubules> to the function of the whole <kidney>.<Carl W. Gottschalk by Maurice B. Burg>[Opening biography and early micropuncture research]{ref}
Their 1959 measurements found that fluid in loop bends, <collecting ducts> and <renal vasa recta> at the same medullary level was similarly hyperosmotic. This supported <countercurrent multiplication> and a shared concentrating environment in the <renal medulla>.<Micropuncture study of the mammalian urinary concentrating mechanism: evidence for the countercurrent hypothesis by Carl W. Gottschalk and Margaret Mylle>[Abstract: comparison of fluid osmolality at matched medullary levels]{ref}
Sampling the correct structure was itself part of the evidence. The memoir describes checking puncture locations with dye and microdissection, helping distinguish a <renal tubule> from a nearby <blood vessel>. A concentration measurement becomes biologically interpretable only when the source of the sample is secure.<Carl W. Gottschalk by Maurice B. Burg>[Micropuncture studies: site verification and distinguishing loop fluid from blood]{ref}
Back to article page
