Effect of non-return valves on the time-of-arrival of new medication in a patient after syringe exchange in an infusion set-up.
Biomed Tech (Berl)
; 68(1): 91-96, 2023 Feb 23.
Article
in En
| MEDLINE
| ID: mdl-36520111
ABSTRACT
The presence of a non-return valve in an infusion set-up is expected to affect the time-of-arrival of new medication in a patient after syringe exchange. Using Computational Fluid Dynamics (CFD) we have studied the flow through a typical non-return valve, focusing on two separate effects (A) the overall delay in the time-of-arrival, and (B) timing effects due to the distortion of the Poiseuille flow profile in the non-return valve. The results show that (A) the additional delay in time-of-arrival of new medication, caused by the non-return valve alone, corresponds to the delay that would be caused by 11.2 cm of extra infusion line instead of the valve, and that (B) the non-Poiseuille flow profile inside the non-return valve gives rise to an extra slow wash-out of the last portion of the remnant fluid of the old medication. We conclude that awareness of these extra delays may be important for clinicians in certain time-critical situations.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Syringes
/
Infusion Pumps
Limits:
Humans
Language:
En
Journal:
Biomed Tech (Berl)
Year:
2023
Document type:
Article
Affiliation country:
Netherlands