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Biomedical subjects

R Whang

Publications and source records attributed to R Whang.

6 recordsLinked to original sources
PubMed1977

Preoperative administration of fluids.

A study by questionnaire was sent to 134 Surgical Services at Veterans Administration Hospitals to ascertain the prevalence of the practice of preoperative hydration during the period of hydropenia preceding surgery. A 92.5 per cent response was noted and the following conclusions are drawn: (1) The majority of Veterans Administration Surgical Services do not routinely provide intravenous fluids during the immediate preoperative period. (2) Affiliation with a medical school-based postgraduate training program does not alter significantly the proportion of Surgical Services providing preoperative intravenous therapy on a routine basis. (3) These observations suggest a need for Surgical Services to assess the desirability and indications of preoperative hydration. (4) However, in the case of chronic renal failure patients there is little question of the necessity for careful preoperative, intraoperative, and postoperative hydration.

Evaluation Studies as Topic↗
PubMed1975

Reversible renal concentrating defect in shock.

The loss of renal concentrating power in haemorrhagic shock is reversible upon correction of the shock state. Shock resulting from acute hypovolaemia leads to the following sequence of events: (1) diminished renal blood-flow; (2) decreased superficial cortical nephron perfusion; (3) continued juxtamedullary nephron perfusion; (4) enhanced proximal reabsorption of Na, Cl, and H23; (5) decreased delivery of these ions to the ascending limb, which results in diminished hypertonicity of the medullary interstitium. This hypotonicity is worsened by the "washout" effect on the interstitial hypertonicity caused by continued perfusion of the juxtamedullary vasa recta which results in (6) diminished renal concentrating capacity due to elimination of medullary hypertonicity. Replenishing blood-loss and correcting the hypovolaemic state "regenerates" the hypertonic renal medullary interstitium by (a) diminishing proximal reabsorption and allowing presentation of greater quantities of Na and Cl to the ascending-limb "pump", (b) restoring superficial cortical nephron perfusion, thereby decreasing juxtamedullary perfusion and in this manner eliminating medullary "washout".

Animals↗
PubMedDate not supplied

Hyperkalemia: diagnosis and treatment.

We have considered a differential diagnosis of clinical hyperkalemia. The clinical signs and symptoms of patients with hyperkalemia are manifold and can involve many organ systems. The nonoliguric chronic renal failure patient with hyporeninemia and hypoaldosteronemia may have as one of his principal problems recurrent hyperkalemia. Treatment of this condition includes well-known modalities such as administration of calcium salts, NaHCO3, removal of potassium with resin or dialysis as well as placement of a transvenous pacemaker in anticipation of bradyarrhythmias or asystole.

Acidosis↗