Evaluation of the functions of the temporary catheter with various tip types

Abstract

Introduction: A temporary catheter (TC) is used short-term and for emergencies. There are some cases when we cannot withdraw blood immediately after inserting the catheter in our patients. The reason is said to be the tips of the TC sticking to the vascular walls.Objective: We evaluated examined 3 catheters with different tip shapes in a simulation circuit to assess the effect on the blood flow.Methods: Water was circulated in the simulation circuit at 1 L/minute. Next, we inserted each TC into the model, and the TCs were connected to the dialysis circuit at 200 mL/minute. We put gold powder into the simulation circuit. We visually observed the movement of the gold power at the head of the catheter and measured the recirculation rate.Result: The uplift type TC was able to perform blood removal and reinfusion with the least difficulties. All recirculation rates were less than 1%. The hindrance caused by hitting a vascular wall is believed to have been reduced. Conclusion:With the manipulation of the catheter tip shapes, blood was able to circulate smoothly. We expect less blood clots and a decrease in sticking to the vascular wall. We plan to study these 3 catheters at clinical tests in the future.

Kalıcı tünelli veya geçici hemodiyaliz kateteri ile rutin hemodiyaliz programında olan hasta grubunda kateter tipine göre Maliyet-Etkinlik araştırması

“…They are easier to place. Even if they provide a lower flow rate, they provide sufficient blood flow for hemodialysis as long as there is no malposition [8].…”

Effects of the tip structure of temporary indwelling catheters on blood recirculation at various blood flow rates and diameters of the mock blood vessel

“…While there are numerous reports of clinical [20][21][22] and animal studies 23 conducted to evaluate recirculation in long-term catheters (tunneled cuffed-type catheters), only a few similar studies, including clinical 24 and in vitro 25 studies, have been conducted for temporary indwelling catheters. The tip structure of the catheter is one of the most important factors influencing recirculation; recirculation reduces the removal performance of hemodialysis, and is expected to be similar regardless of whether the catheter used is a long-term catheter or a temporary catheter.…”

Difficulty removing dialysis cuff catheter after its adhesion to the right atrium

“…In a related investigation using a fluid experiment, we observed that the fluid in blood vessels changes if the catheter tip structures are different. 6 The impact of adhesion due to the catheter tip's structure should be considered when a dialysis catheter is being selected. The split steam catheter that was used for the present patient has separate blood removal and auto-transfusion sections.…”

“…In a related investigation using a fluid experiment, we observed that the fluid in blood vessels changes if the catheter tip structures are different. 6…”