Infusion Rate Calculator (mL/hr) Field Guide: When One Volume, One Time Window, and One Pump Units Check Decide Whether the Drip Lands Where the Order Said or Somewhere You Have to Chase

An infusion-rate calculation looks like arithmetic on a worksheet — total volume divided by total time — and most of the time it is. The trap is the three silent-failure modes that hide behind the simple formula: wrong pump units, wrong bag contents, and wrong duration interpretation.

Pedigree Probability Tree Field Guide: When One Tree, Three Modes, and Four Leaves Decide the Offspring Risk

A 1/4 affected risk on every pregnancy is the headline number, but the pedigree probability tree is what gets you there. This field guide walks through the seven decisions the tree hides, the three formulas that cover most counseling conversations, and the two arithmetic slips that quietly turn a 25% answer into a 50% one.