Intermittent HD superior to CVVHD in removing methanol and formate in methanol poisoning. http://t.co/8sHi23RnLu cc: @kidney_boy
— Bryan D. Hayes (@PharmERToxGuy) March 17, 2014
|See if you can get a few more authors next time.|
They prospectively observed 24 cases of methanol ingestion out of 121 cases in a mass methanol poisoning in the Czech Republic. Looks like it was due to contamination of spirits with industrial methanol. Apparently this is a relatively common problem.
41 deaths. All patients in the observation cohort were treated with ethanol (17 patients) or fomepizole (4) or both (3) to prevent conversion of methanol to the downstream toxic metabolite, formic acid.
|15 years old and this page still stands-up. Some stuff never changes.|
Page 358 of the Fluids Book.
The half life of methanol with conventional dialysis was 3.7 hours and 8.1 hours with continuous dialysis. Not suprisingly all of the componants associated with more efficient dialysis were associated with with faster clearance of methanol: increased dialyzer surface area, increased blood flow and increased dialysate flow. Those half-lifes are remarkably shorter than the half life of methanol in the body using renal and pulmonary clearance.
On the other hand folate supplementation, the pre-dialysis methanol level and the nature of the antidote (ethanol versus fomepazole) made no difference.
The shorter half-life with intermittent conventional dialysis did not transplant into better patient survival.
They turned their math into specific treatment guidelines.
Some interesting tidbits. You know that graft that shows that the osmolar gap falls as the anion gap rises?
|Canadian Family Physician|