An Investigation of a Pressure Controlled Fluidic Value Used for Controlling the Volume of the Human Bladder of a Catheterized Patient
Abstract
The hydraulic behavior of a pressure controlled valve used in conjunction with a catheter was examined to establish functional design criteria. The function of the valve is to allow cycling of the human bladder to minimize the occurrence of bladder infection. The valve consisted of a piston, or poppet, inside a cylinder, which established an annular flow between the poppet and cylinder, while the valve was in the open position. The analysis and experimentation examined two diverse annular flow conditions. First, the case when the poppet positioned itself concentrically with respect to the cylinder was analyzed, in which a Poiseuille flow solution was utilized. Next, the case in which the poppet is in contact with the cylinder (eccentric case) was investigated, which required solving Laplace's equation for velocity over a non-concentric annulus. For both cases fully developed flow was not established throughout the gap, thus the effects of flow in the entrance region on the pressure drop for the gap had to be included in the derived mathematical models. Experiments were performed to test the theoretical models for both the concentric and eccentric cases. Results showed a great dependence of the annular gap size, poppet length and diameter, and valve inlet and outlet diameters. Once the flow behavior was established, then a parametric variation was performed to find a range of parameter dimensions which allowed the valve to function properly.
Notes
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Graduation Date
1990
Semester
Spring
Advisor
Eno, Burton E.
Degree
Master of Science (M.S.)
College
College of Engineering
Department
Mechanical Engineering and Aerospace Sciences
Degree Program
Mechanical Engineering
Format
Pages
59 p.
Language
English
Length of Campus-only Access
None
Access Status
Masters Thesis (Open Access)
Identifier
DP0027295
Subjects
Dissertations, Academic -- Engineering; Engineering -- Dissertations, Academic
STARS Citation
Miller, Patrick Jay, "An Investigation of a Pressure Controlled Fluidic Value Used for Controlling the Volume of the Human Bladder of a Catheterized Patient" (1990). Retrospective Theses and Dissertations. 4038.
https://stars.library.ucf.edu/rtd/4038
Accessibility Status
Searchable text