Vacuum Tube Receiver Pressure Control for PIVC Blood Draw

Solution Overview

Problem

Vacuum tubes used with peripheral IV catheters (PIVCs) face issues such as restricted blood flow and increased likelihood of hemolysis due to flexible catheters and non-optimized pressure characteristics, leading to vein collapse and blood cell damage.

Innovation Solution

A vacuum tube receiver with features like elongated openings, insertion depth control components, multiple spikes, and flow control mechanisms to manage blood flow rate and pressure, ensuring controlled insertion and gradual pressure equalization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a vacuum tube is connected to a peripheral IV catheter, then blood can be drawn from the patient, but significant pressure drop occurs which increases the likelihood of hemolysis or blood cell damage

Engineering Contradiction:

Improveblood collection efficiencyVSAvoidhemolysis risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary action by pre-flushing the catheter with saline before connecting the vacuum tube. This preliminary flushing action removes blood from the catheter lumen and reduces the initial pressure drop that would otherwise occur when vacuum is applied, thereby minimizing hemolysis risk while maintaining efficient blood collection

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses an intermediary approach by introducing a three-way valve and extension tube between the catheter and vacuum tube. This intermediary configuration allows for controlled connection and disconnection, enabling the vacuum tube to be connected without immediately creating a pressure drop, thus reducing hemolysis while maintaining productivity

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If a vacuum tube is connected to a peripheral IV catheter, then blood can be drawn from the patient, but the flexible plastic catheter may be positioned against the vein wall restricting blood flow

Engineering Contradiction:

Improveblood flow rateVSAvoidblood flow characteristics

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The system performs preliminary action by pre-flushing the catheter with saline before connecting the vacuum tube. This preliminary flushing action removes blood from the catheter lumen and reduces the initial pressure drop that would otherwise occur when vacuum is applied, thereby minimizing hemolysis risk while maintaining efficient blood collection

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses a dynamic three-way valve that can be switched between different positions (connected, disconnected, and flushed). This dynamic control allows the operator to optimize the connection state based on the specific clinical situation, enabling efficient blood collection while maintaining ease of operation by allowing easy disconnection and reconnection

Inventive Principle:

Principle #15Dynamics

3Productivity

If a vacuum tube is connected to a peripheral IV catheter, then blood can be drawn from the patient, but the catheter opening may be positioned against the vein wall thereby restricting blood flow

Engineering Contradiction:

Improveblood collection speedVSAvoidpressure drop

Core Design Contradiction:

ProductivityVSStress or pressure

Solution Approach 1:

The system performs preliminary action by pre-flushing the catheter with saline before connecting the vacuum tube. This preliminary flushing action removes blood from the catheter lumen and reduces the initial pressure drop that would otherwise occur when vacuum is applied, thereby minimizing hemolysis risk while maintaining efficient blood collection

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses an intermediary approach by introducing a three-way valve and extension tube between the catheter and vacuum tube. This intermediary configuration allows for controlled connection and disconnection, enabling the vacuum tube to be connected without immediately creating a pressure drop, thus reducing hemolysis while maintaining productivity

Inventive Principle:

Principle #24Intermediary (Mediator)

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

The solution minimizes initial pressure drops and hemolysis risks, allowing for efficient blood collection with reduced vein occlusion and optimized flow characteristics.

Implementation Method 1

Vacuum tubes, such as the BD Vacutainer tubes sold by Becton Dickinson, are commonly used to draw blood from a patient

Methodology Applied

Scientific EffectVacuum: Vacuum

Implementation Method 2

the vacuum within vacuum tube 110 will cause blood to flow into vacuum tube 110

Methodology Applied

Scientific EffectPressure gradient: Pressure Gradient

Data Source

PatentUS20260083366A1Vacuum Tube Receiver for Drawing Blood Through a Peripheral IV Catheter

Publication Date: 2026.03.26 BECTON DICKINSON & CO

AI summary

A vacuum tube receiver can include a housing that has a proximal end and a distal end. The housing can include a hollow interior and a proximal opening for receiving a vacuum tube into the hollow interior. The distal end of the housing can form an adapter for coupling the vacuum tube receiver to an intravenous system. The vacuum tube receiver may also include one or more spikes that extend proximally into the hollow interior to form a blood flow path. The vacuum tube receiver can include a number of features to control the pressure and/or flowrate of blood into a vacuum tube.