Draining Urinary Sediments Through Conventional Eyelet Catheters and New Intermittent Micro-Hole Zone Catheters

Area of Science:

• Urology
• Biomedical Engineering
• Medical Device Analysis

Background:

• Urine sediments, including casts and mucus, can complicate intermittent catheterization.
• Conventional and micro-hole catheters differ in design, potentially affecting their ability to drain urine with varying sediment loads.

Purpose of the Study:

• To evaluate urine sediment characteristics in both uncomplicated and complicated urine samples.
• To assess the drainage efficacy of conventional and micro-hole intermittent catheters for these sediments.

Main Methods:

• A randomized, single-blinded, cross-over study involving healthy volunteers and patients using intermittent catheterization.
• Urine samples were collected using conventional and micro-hole catheters and analyzed for sediment content and size distribution.
• Laboratory drainage tests were conducted using complicated urine samples and both catheter types.

Main Results:

• Sediments were present in all urine types, with larger quantities and sizes observed in complicated and cloudy urine.
• Sediment loads in complicated urine were sufficient to cause obstruction in some micro-hole and conventional catheters.
• Sediment sizes ranged from 2 to 195 μm in clear urine and 2 to 131 μm in cloudy urine.

Conclusions:

• Micro-hole zone catheters demonstrate broad applicability for draining most urine samples.
• Specific patient populations with complicated urine and high sediment burdens require careful consideration before recommending micro-hole catheters.