EP0334015A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A device for delivering a fluid sample to a diagnostic device at a controlled rate

Assignee: Becton Dickinson and Co

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Filing: 1989-02-15

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Granted: —

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Expires: 2009-02-15

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Abstract

Abstract A device for delivering fluids to a flow through diagnostic device at a controlled rate is shown. It has a well with an opening in its bottom and a flow controlling membrane covering the opening. The size of the opening and the mean pore size of the flow controlling membrane are selected to achieve a controlled flow rate. In use the delivery device is mated with a test surface of a flow through diagnostic device and a fluid sample is placed in the well. The fluid flows through the delivery device and contacts a test area of the diagnostic device at a controlled rate. Thereafter assay reagents may be added to the test area through the delivery device or the delivery device can be removed and discarded.

Inventors

👤 Patricia A. Gary
👤 Melissa S. Maret

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-11-05 06:01

CPC Classifications

G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/543; G01N33/54366; B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5023; G01N33/54386; G01N33/54387; G01N33/54391; B01L2200/00; B01L2200/02; B01L2200/026; B01L2300/00; B01L2300/08; B01L2300/0809; B01L2300/0887; B01L2400/00; B01L2400/04; B01L2400/0403; B01L2400/0406; B01L2400/08; B01L2400/084

Claims Analysis

Total Claims: 10

Claim 1

Independent Claim 72 words

A device for delivering a fluid sample to a diagnostic device at a controlled rate comprising: a well for receiving a fluid sample, the well having a bottom, an opening in the bottom of the well so that the fluid sample will flow out of the well, and a flow controlling membrane covering th opening to deliver the fluid sample to a top surface of a diagnostic device at a controlled rate.

Claim 2

Independent Claim 72 words

Claim 3

Dependent Claim 28 words

The device of claim 1 further comprising means in the device to selectively remove interfering substances from a fluid sample without trapping an analyte in the fluid sample.

Claim 4

Dependent Claim 22 words

The device of claim 2 wherein the means to selectively remove interfering substances is a specific binding species for the interfering substance.

Claim 5

Dependent Claim 17 words

The device of claim 3 wherein the specific binding species is secured to the flow controlling membrane.

Claim 6

Dependent Claim 17 words

The device of claim 1 wherein the flow controlling membrane has assay reagents releasably coated on it.

Claim 7

Dependent Claim 30 words

The device of claim 1 wherein the bottom of the well has a lower surface sized and shaped to mate with an upper surface of a flow through diagnostic device.

Claim 8

Dependent Claim 27 words

The device of claim 1 further comprising a handle secured to the well to facilitate handling of the device without touching a fluid sample in the well.

Claim 9

Dependent Claim 16 words

A diagnostic kit comprised of the device of claim 1 and a flow though diagnostic device.

Claim 10

Dependent Claim 75 words

An assay for an analyte in a fluid sample comprising: delivering a fluid sample to the device of claim 1 so that the fluid sample flows out of the opening at a controlled rate; causing the fluid flowing out of the opening to contact an upper surface of a flow through diagnostic device having a specific binding species for the analyte secured to a top surface; and detecting the presence of analyte using a tracer.

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