The goal of this randomized, controlled crossover study was to assess the performance of a new micro-hole zone catheter compared to a conventional 2-eyelet catheter in 42 male intermittent catheter users. The main objective of this study was to demonstrate superiority of the micro-hole zone catheter in terms of number of flow-stop episodes and residual volume at first flow-stop, with the catheterization performed by a health care professional in a hospital setting compared to a conventional two-eyelet catheter.
The investigation was a single-centre, randomized, controlled crossover study including 42 male participants comparing the performance of two intermittent catheters (IC). The study included an information visit (visit 0) and two test visits (visit 1 and 2) in which one catheterization with either the investigational device or the comparator device, according to a randomization scheme, was performed by a health care professional in a hospital setting assessing flow stop episodes, bladder emptying and hematuria. There were 4-14 days between each test visit (visit 1 and 2) and visit 0 and 1 could be held on the same day.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
42
The investigational device was a urinary catheter for bladder drainage through the urethra. The product is for intermittent use.
The comparator device is a urinary catheter for bladder drainage through the urethra. The product is for intermittent use.
Sanos Clinic
Gandrup, Denmark
Number of Flow-stop Episodes
Flow-stops were measured with a pressure sensor, which is an electronic device used for monitoring the hydrostatic pressure at the outlet of an intermittent urinary catheter during emptying. From a sensor curve, flow-stops were identified by two individually trained evaluators as a hydrostatic pressure peak coinciding with a urine flow-stop/ urine dripping (flowrate lower than 0,8 ml/sec). Results from both evaluators were compared and in case of discrepancy a discussion was performed to extenuate discrepancies and agree on a final interpretation of the curves.
Time frame: Immediately after the procedure/catheterization
Residual Urine at 1st Flow-stop
The residual urine at 1st flow-stop during catheterization (performed by a nurse) represents the volume of urine left in the bladder, the first time the urine stops running out of the catheter during bladder emptying. Hence, the residual volume at 1st flow-stop was calculated as the total volume post catheterisation minus the volume at 1st flow-stop, derived from a catheterisation profile which was connected to a time-logged weighing \[g\].
Time frame: When the first flow-stop appeared, the amount of voided urine was measured.
Number of Flow-stop Episodes
Flow-stop episodes were determined as instances where the flow rate decreased to less than 0.8 mL/s for a period of at least two seconds. All episodes were detected by automatic thresholding, followed by manual inspection, where the intra-catheter pressure readings were used to support the assessment of a flow stop.
Time frame: Immediately after catheterisation
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