Split Sleeve Sealing for Intravascular Pump Inlet Blood Loss
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Solution Overview
Problem
Intravascular blood pumps experience blood loss during insertion due to fluid flow through the inlet, and existing solutions like longer sheaths outside the body or rapid insertion pose risks or limitations.
Innovation Solution
A split sleeve with a flexible design and adjustable inner diameters is applied over the pump inlet to create a seal, preventing fluid loss by applying pressure and dislodging from the sheath during insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If a longer sheath is used outside the body to prevent blood loss, then blood loss is reduced, but device complexity and patient discomfort increase
Solution Approach 1:
The sheath is divided into a proximal portion and a distal portion with different inner diameters. The proximal portion has a larger inner diameter to accommodate the pump and allow blood flow, while the distal portion has a smaller inner diameter to seal around the pump and prevent blood loss. This segmentation resolves the contradiction by providing both blood loss prevention and maintaining reasonable device dimensions.
Solution Approach 2:
Different portions of the sheath have different structural properties tailored to their specific functions. The proximal portion is designed with a larger diameter for blood flow accommodation, while the distal portion is designed with a smaller diameter for sealing. This local differentiation allows the sheath to prevent blood loss without requiring excessive overall length or complexity.
2Loss of substance
If rapid insertion is performed to minimize blood loss, then blood loss is reduced, but procedural safety and control decrease
Solution Approach 1:
The split sleeve is pre-assembled onto the pump before insertion into the patient's body. The sleeves are positioned in advance to ensure proper alignment and sealing capability. This preliminary preparation allows for controlled, deliberate insertion without the need for rapid actions, thereby maintaining procedural safety while preventing blood loss.
Solution Approach 2:
The split sleeve acts as an intermediary component between the pump and the external environment. It provides a controlled interface that prevents blood loss during insertion and removal operations, allowing physicians to proceed at a controlled pace without compromising safety or increasing blood loss.
3Ease of manufacture
If the sleeve has a uniform inner diameter to simplify manufacturing, then manufacturing precision is improved, but the ability to create an effective seal is reduced
Solution Approach 1:
The sheath is segmented into portions with different inner diameters. The proximal portion has a larger inner diameter that is easy to manufacture, while the distal portion has a smaller inner diameter optimized for sealing. This segmentation allows the sheath to maintain manufacturing simplicity in the majority of its length while providing effective sealing where needed.
Solution Approach 2:
The sheath implements local quality by providing a smaller inner diameter specifically in the distal portion where sealing is required, while maintaining a larger inner diameter in the proximal portion for ease of manufacture and blood flow accommodation. This localized differentiation resolves the contradiction between manufacturing simplicity and sealing effectiveness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively minimizes blood loss and maintains procedural control by forming a seal over the pump inlet, ensuring safe and controlled insertion and removal of the intravascular pump.
Implementation Method 1
applying pressure to the sleeve over the inlet of the intravascular pump to prevent fluid from passing through the inlet
Data Source
AI summary
The disclosed technology includes a flexible sleeve having a split that can be removably disposed over an inlet of an intravascular pump while the pump is inserted into a cardiovascular system. The split sleeve can be configured to prevent blood from flowing out the inlet, thereby reducing or preventing blood loss. As the intravascular pump is inserted into an introducer sheath and into a patient, the physician can apply pressure to the split sleeve and the inlet of the intravascular pump, thereby creating a seal and preventing blood loss.