Nested Collection Catheter for Peripheral Blood Sampling
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Solution Overview
Problem
Current methods for blood sampling, such as venipuncture, often result in painful and frequent needle insertions, with peripheral intravenous catheters prone to clotting and damage, leading to compromised samples and instrumentation harm.
Innovation Solution
A system comprising a catheter with a distal end extending beyond a conduit in the body and a proximal end coupled to an external source, along with adapters and a protective sheath, allows for less painful and dependable blood sampling by facilitating fluid transport between the body and an external source, reducing clotting and damage risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If blood is drawn from a peripheral intravenous catheter, then blood sampling can be performed without repeated needle insertions, but clots tend to form at the catheter tip leading to compromised samples and potential harm
Solution Approach 1:
The invention extracts the blood sampling function from the intravenous catheter system by introducing a separate collection catheter that can be inserted through the IV catheter. This allows blood to be collected at the distal end of the IV catheter (close to the vein) without drawing directly from the catheter tip, thereby preventing clot formation at the catheter tip while enabling convenient blood sampling
Solution Approach 2:
The collection catheter is nested inside the intravenous catheter, with the collection catheter's distal end extending beyond the IV catheter's distal end. This nested configuration allows the collection catheter to access the vein directly through the IV catheter pathway, enabling blood collection without compromising the IV catheter's integrity or function
2Productivity
If repeated venipuncture is performed to obtain blood samples, then multiple samples can be taken, but each attempt is painful and the location becomes increasingly difficult to find
Solution Approach 1:
The intravenous catheter serves multiple functions: it maintains intravenous access for fluid administration and simultaneously provides a pathway for blood collection through the nested collection catheter. This multi-functionality eliminates the need for separate venipuncture procedures, allowing repeated blood sampling from the same site without additional needle insertions
Solution Approach 2:
The collection catheter acts as an intermediary device that enables blood collection through the existing IV catheter pathway. It mediates between the IV catheter system and the blood collection process, allowing samples to be obtained without direct access to the vein through new needle insertions
3Productivity
If blood is drawn frequently from a peripheral intravenous catheter, then multiple samples can be obtained, but the catheter tip becomes damaged leading to compromised samples and instrumentation harm
Solution Approach 1:
The blood collection function is extracted from the intravenous catheter by using a separate collection catheter. This prevents the mechanical stress of repeated blood drawing from affecting the IV catheter tip, preserving its structural integrity while enabling frequent sampling through the collection catheter
Solution Approach 2:
The system is segmented into two distinct catheters: the intravenous catheter for fluid administration and the collection catheter for blood sampling. This segmentation allows each catheter to be optimized for its specific function, with the collection catheter bearing the mechanical stress of blood collection without compromising the IV catheter's integrity
Data Source
AI summary
Methods and devices are provided for transporting fluid between a body and an external source. More particularly, the methods and devices provided can be used to transport blood from a body. In one exemplary embodiment, a system is provided for transporting fluid between a body and an external source. The system can include a collection catheter that is sized to fit inside a catheter that is placed in the body and configured to have its distal end extend beyond a distal end of the catheter that is placed in the body. Various methods for transporting fluid from the body to an external source are also provided.