Medical Intelligence from The New England Journal of Medicine — VI. Hyperkalemia. Hyperkalemia is a potentially life-threatening condition in which serum potassium exceeds mmol/l. It can be caused by reduced renal excretion, excessive. n engl j med ;3 january 15, mmol per liter.1,2 Hyperkalemia is defined as erate hyperkalemia) and more than mmol per.

Author: Voodoorg Fesida
Country: Republic of Macedonia
Language: English (Spanish)
Genre: Science
Published (Last): 1 May 2010
Pages: 312
PDF File Size: 16.35 Mb
ePub File Size: 2.8 Mb
ISBN: 189-9-49686-875-8
Downloads: 64054
Price: Free* [*Free Regsitration Required]
Uploader: Negore

Effect of prolonged bicarbonate administration on plasma potassium in terminal renal failure. Excretion mainly occurs in the cortical collecting duct [ 2 ]. Renal and gastrointestinal potassium excretion in humans: PHA type I secondary to loss of function mutations of the ENaC not only affects the kidney but also the lungs, colon, and sweat and salivary glands. Several co-transporters and ion channels are involved in the complex regulatory system nehm potassium reabsorption.

Pathogenesis, diagnosis and management of hyperkalemia

Please review our privacy policy. More effective if given orally.

Succinylcholine-induced hyperkalemia in acquired pathologic states: These therapeutic measures often are sufficient in acute hyperkalemia in patients without significant renal impairment, where an increase in renal potassium excretion can be achieved. Onset within h, lasting h. In patients with unimpaired renal function and intact other regulatory mechanisms, large amounts of potassium are needed to achieve hyperkalemia [ 11 ].

Succinylcholine, especially when given to patients with burn injuries, immobilization, or inflammation [ 26 ].


Kemper MJ Potassium and magnesium physiology. Anja Lehnhardt and Markus J.

Cortisol, beta hydroxylase or hydroxylase or OH progesterone in plasma. Huang C, Miller RT. However, moderate and especially severe hyperkalemia can lead to disturbances of cardiac rhythm, which can be fatal [ 2829 ]. Retrospective review of the frequency of ECG changes in hyperkalemia. Reduction in adrenal aldosterone biosynthesis through interrupting renin-aldosterone axis.

Palmer LG, Frindt G. Which of the following clinical conditions typically causes hyperkalemia answer true or false for a through e acute renal failure.

Salbutamol has been shown to be safe and even superior to rectal cation-exchange resin in nonoliguric preterms with hyperkalemia [ 34 ]. J Toxicol Clin Toxicol. It modulates excretion of not only potassium but also calcium and magnesium. Pseudohypoaldosteronism PHA refers to a heterogeneous group of disorders of electrolyte metabolism characterized by hyperkalemia, metabolic acidosis, and normal GRF [ 18 ].

It hyprrkalemia be caused by reduced renal excretion, excessive intake or leakage of potassium from the intracellular space. The following steps often have to be addressed simultaneously. Acute increase in osmolality secondary to hyperglycemia or mannitol infusion causes potassium to exit from cells [ 24 ]. Management should not only rely on ECG changes but be guided by the clinical scenario and serial potassium measurements [ 2931 ].

Pathogenesis, diagnosis and management of hyperkalemia

Especially in pediatrics, mechanical hemolysis can occur during difficult blood draws, and even more in samples with lymphocytosis or thrombocytosis. Renal mechanisms of potassium handling Handling of potassium in the nephron depends on passive and active mechanisms. Close electrolyte and blood glucose monitoring is hypperkalemia, hypoglycemia being the main side-effect.


If elevated serum potassium is found in an asymptomatic patient with no apparent cause, factitious hyperkalemia should be considered. Hyperkalemic distal renal tubular acidosis associated with obstructive uropathy. Especially when capillary samples are taken, excess alcohol on the skin should be avoided, as it is the primary cause of the hemolysis in this process. Management of hyperkalemia Therapeutic strategies should be individualized, taking into account the degree and the cause of hyperkalemia.

Increased shift of potassium from intra to extracellular space Acidosis: Knowledge of the physiological mechanisms of potassium handling is essential in understanding the causes of hhyperkalemia as well nej its treatment.

Transient type 1 pseudo-hypoaldosteronism: Am Hyprekalemia Emerg Med. Salbutamol ten drops of standard sabutamol inhalation solution contain 2. In summary and conclusion, the effective and rapid diagnosis and management of acute and chronic hyperkalemia in children, especially if renal function is impaired, is clinically relevant and can be life-saving. The utility of the transtubular potassium gradient in the evaluation of hyperkalemia. Human cortical distal nephron: Renal replacement therapy RRT hyperkalejia the ultimate measure in severe hyperkalemia.