Micro-volume blood transfer device
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Assignees
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Publication Number
US-10980462-B2
Publication Date
2021-04-20
Expiration Date
Abstract
A micro-volume blood transfer device to facilitate the collection of small volumes of clean arterial blood from patients who may be volume restricted for blood loss such as low-birth weight infants.
Core Innovation
The micro-volume blood transfer device includes a micro bore transfer tube having a transfer tube distal opening and a transfer tube proximal opening. The transfer tube proximal opening is connected to a Y-connector, and the Y-connector is further connected to a clearance line and a sample line. The clearance line has a mini pinch clamp and the sample line has a second mini pinch clamp, and blood is routed so the clearance line collects a reduced amount of blood while a clean blood sample is directed into the sample line.
The transfer tube distal opening is inserted through a catheter hub where blood from a patient is in fluid communication with a catheter opening, and the transfer tube comes to rest within one-two millimeters of the catheter opening. This placement reduces clearance volume by bypassing the hub, so the clearance line collects less than 0.5 milliliters of blood. The described clearance volume control is refined for a PAL catheter blood draw and an UAC catheter blood draw with reduced flush volume.
The device is further described with female luer connectors that include a porous 0.22 µm filter plug on the clearance line and on the sample line. Closed-system operation avoids open stopcocks and needle sticks while minimizing line accesses, and the micro-volume design prevents aspirating pressure during self-venting syringe use and reduces waveform interference during hemodynamic monitoring.
Claims Coverage
The independent claim covers a micro-volume blood transfer device with a micro bore transfer tube connected to a Y-connector that divides flow into a clearance line and a sample line via mini pinch clamps, with the distal opening positioned within one-two millimeters of a catheter opening and the clearance line collecting less than 0.5 milliliters. The dependent claims further specify porous plug luer hardware and the use of syringes on the sample line.
Micro bore transfer tube connected to a Y-connector with mini pinch clamps
The micro bore transfer tube proximal opening is connected to a Y-connector, wherein the Y-connector is connected to a clearance line and a sample line, the clearance line has a mini pinch clamp and the sample line has a second mini pinch clamp.
Distal opening positioned within one-two millimeters of the catheter opening
The transfer tube distal opening is inserted through a catheter hub where blood from a patient is in fluid communication with a catheter opening and the transfer tube comes to rest within one-two millimeters of the catheter opening.
Clearance line collects less than 0.5 milliliters of blood
The clearance line collects less than 0.5 milliliters of blood.
Female luer connectors with porous plug at clearance and sample lines
The device includes a female luer with a porous plug inserted on the terminal end of the clearance line and a female luer with a porous plug inserted on the terminal end of the sample line.
Self-venting syringe attachment to the sample line
The sample line has a self venting syringe attached to the female luer, or any desired type of syringe for collection of fluid/blood.
Overall, the claims cover a closed micro-bore blood transfer arrangement that uses a Y-connector and mini pinch clamps to separate a low-volume clearance line from a sample line, with the distal tube opening positioned within one-two millimeters of the catheter opening and clearance blood limited to less than 0.5 milliliters. Dependent features add porous-plug female luer connectors and syringe-based sample collection including self-venting syringes.
Stated Advantages
Reduced waste/clearance volume, with the clearance line collecting less than 0.5 milliliters of blood.
Avoids open stopcocks and needle sticks by enabling closed-system operation.
Minimizes line accesses.
Prevents aspirating pressure when self-venting syringes are used.
Reduces flush volume for UAC catheter blood draw.
Reduces waveform interference during hemodynamic monitoring.
Reduces infection risk and needle stick injury, as described in the background/summary context.
Documented Applications
Micro-volume blood collection in neonates and volume-restricted patients to collect clean arterial blood.
PAL catheter blood draw.
UAC catheter blood draw.
Hemodynamic monitoring.
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