Load cell based toco transducer
Publication Date: 2009-Jan-29
The IP.com Prior Art Database
The invention provides a pressure measurement system configured for measuring pressure resulting from the uterine activity and a method of measuring pressure using a compression load.
LOAD CELL BASED TOCO TRANSDUCER
The invention generally relates to a fetal monitoring device/apparatus, and more particularly to an apparatus for sensing uterine activity.
BACKGROUND OF THE INVENTION
One of the prior art pressure sensing systems includes a Linear Variable Differential transducer (LVDT). The LVDT is associated with a set of manufacturing issues which involves the use of complex assembly procedures.
Thus there exists a need for a pressure sensing system that is simple in construction, reliable, compact and cost effective.
BRIEF DESCRIPTION OF THE INVENTION
The invention provides a pressure measurement system configured for measuring pressure resulting from the uterine activity and a method of pressure measurement using a compression load.
DETAILED DESCRIPTION OF THE INVENTION
In one embodiment, a pressure measurement system employing a load cell as sensing element is provided. The pressure measurement system, schematically shown in FIG. 1, comprises a movable membrane diaphragm mounted on the abdomen of a patient such as a pregnant woman, a loading spring coupled to the movable diaphragm and a load cell. The loading spring comprises a first end and a second end. The first end of the loading spring is coupled to the load cell and the second end of the loading spring is coupled to the movable diaphragm. The pressure measurement system may further comprise a signal-conditioning unit coupled to the load cell.
The movement of the abdomen causes displacement of the movable diaphragm. Displacement of the movable diaphragm in a loading direction, shown at FIG. 1, results in compression of the loading spr...