Stewart-Hamilton Method

Stewart-Hamilton method

The Stewart-Hamilton method is a method for determining blood pressure proposed by Canadian physiologist G.N. Stewart and the American physiologist W.F. Hamilton in 1893.

The essence of the method is as follows: a rubber cuff is placed on the skin in the bend of the elbow, which compresses the brachial artery. Then the cuff is gradually released, and pulsation appears in the elbow area. The moment of pulsation appearance is recorded using a special device - a sphygmograph.

The pressure in the cuff at the moment of pulsation will correspond to systolic blood pressure. To determine diastolic pressure, the cuff is further deflated, noting the moment the pulsation disappears.

This method is also called the dye method or the dye dilution method, since it originally used a dye solution that was injected into the vena mediana cubiti to observe the moment the colored blood appeared distal to the applied cuff.

Stuart Hamilton method

*Stuart-Hamilton method* or *dye extraction method* (the term *Stuart-Hamilton method* is often found in English literature) is a *classical scientific method* used in various branches of science. This method is used to study the relationship between the amount or location of a physical or chemical phenomenon, such as sound frequency or enzymatic activity, and changes in environmental conditions. It was developed in the early 20th century by Canadian physiologist Stuart Hamilton (1869-1925) in collaboration with American physiologist Walter Phillips (1998-