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Multisensor probe for tissue identification

a multi-sensor probe and tissue technology, applied in the field of tissue identification, can solve the problems of high undesirable, invasive, painful and undesirable for patients, and a major handicap for patients in open surgical breast biopsies

Inactive Publication Date: 2005-11-24
BIOLUMINATE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0019] Another variation of the present invention includes the multisensor probe as described above wherein the probe further includes a form of a 18-21 gauge needle. In one variation, the needle is blunt. In another variation the needle is sharp. In still another variation the needle is cut and polished at an angle less than 70 degrees and preferably ranging from 40 to 60 degrees.

Problems solved by technology

Open surgical breast biopsies are highly undesirable because they are invasive and traumatic to the patient.
The open surgical biopsy is the most common form of biopsy and is invasive, painful and undesirable to the patient.
The open surgical biopsies may also leave scar tissue which may obscure the diagnostic ability of future mammograms, creating a major handicap for the patient.
A shortcoming, however, with stereo tactic biopsies is poor accuracy.
The poor accuracy is a result of the small sample size which makes accurate cytology difficult.
Another drawback of typical biopsy procedures is the length of time required for the laboratory to review and analyze the excised tissue sample.
Consequently, many women may experience intense anxiety while waiting for a final determination.

Method used

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  • Multisensor probe for tissue identification
  • Multisensor probe for tissue identification
  • Multisensor probe for tissue identification

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0040]FIGS. 1A-1C illustrate an embodiment of the present invention in an application. Referring to FIG. 1A, a multisensor probe 10 is shown inserted in breast tissue 20. The multisensor probe 10 includes a handle 14 for manually manipulating the probe and a needle 16 extending from the handle. The distal tip of the needle is shown at location A and is directed towards a suspicious lesion 30. FIG. 1B shows the distal tip of the needle within the suspicious lesion 30 at location C.

[0041] The probe 10 includes a plurality of sensors to measure tissue properties which are useful in identifying tissue such as cancerous tissue. The sensors may take many forms including, for example, optical fibers for receiving and transmitting light to and from the probe tip. The probe's position or depth is also measured as the probe 10 is inserted into the tissue 20. These measurements are preferably taken and processed continuously and in real time as the probe penetrates the tissue.

[0042]FIG. 1C s...

second embodiment

[0079] Another multisensor probe 600 in accordance with the present invention is shown in FIG. 6. The multisensor probe 600 includes a handle 610 and an elongate body or needle 620 extending from the distal end of the handle. The needle 620 is shown within a slideable sheath 630.

[0080] Sheath 630 is configured such that it retracts into the handle 610 when the needle is inserted into tissue. When not retracted, the slideable sheath 630 covers the needle 620 to protect against accidental needle exposure. The sheath 630 is urged over the needle using a resilient member 660 such as a spring. The spring connects to the sheath and applies a force urging the sheath over the full length of the needle. The force supplied by the resilient member 660, however, is not so great that it inhibits manipulation of the needle into the tissue. The resilient member is thus selected or adjusted to allow the sheath to easily retract as the needle is inserted into tissue. Suitable materials for the shea...

examples

[0120] A multisensor probe in accordance with the present invention was built and tested. The probe featured a needle, a handle for manipulating the handle, an OSAS sensor, and OCDR sensor, and an impedance sensor. The OSAS sensor included a source fiber and two collection fibers. The OCDR sensor included a single mode fiber. The electrical impedance sensor included a central conductor as one electrode and the outer needle wall as the second electrode.

[0121] A xenon flash lamp was used as a light source for the test probe. FIGS. 11A and 11B show the spectrum of light collected by two OSAS fibers during in-vitro testing for normal and malignant tissue respectively. The line or “signature” represented by “channel 2” represents light collected from one optical fiber and the line represented by “channel 3” represents light collected from another optical fiber. The “channel 2” optical fiber was closer (center to center) to the light emitting fiber than the “channel 3” fiber.

[0122] Ampl...

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Abstract

A multisensor probe for continuous real-time tissue identification. The multisensor probe includes a tissue penetrating needle, a plurality of sensors useful in characterizing tissue and a position sensor to measure the depth of the needle into the tissue being diagnosed. The sensors include but are not limited to an optical scattering and absorption spectroscopy sensor, an optical coherence domain reflectometry sensor, an electrical impedance sensor, a temperature sensor, a pO2 sensor, a chemical sensor and other sensors useful in identifying tissue. The sensors may take the form of a plurality of optical fibers extending through said needle. A retractable sheath may be disposed around the distal section of the needle to protect the needle when not in use. The sheath retracts when the probe is inserted into tissue and the position of the sheath relative to the needle may be measured to determine the needle's depth. Systems and methods for tissue identification are also provided.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation of U.S. Ser. No. 09 / 947,171, filed Sep. 4, 2001, the entire disclosure of which is incorporated herein by reference.TECHNICAL FIELD [0002] This invention is directed to tissue identification and in particular, to a multisensor probe for identifying cancerous tissue in vivo. BACKGROUND [0003] Every week in the United States about 19,000 open surgical breast biopsies are performed on women. Only about 3000 cancers will be found. Thus, about 85% of the biopsies are unnecessary. This means about 16,000 women will needlessly undergo open surgical breast biopsies in the U.S. every week because of the inaccuracy in diagnosing cancerous tissue in the breast. [0004] Open surgical breast biopsies are highly undesirable because they are invasive and traumatic to the patient. In a surgical biopsy, the suspected location of the abnormality would be marked with a thin, hooked guide wire. The surgeon tracts the guide...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B5/00A61B5/01G01N21/17A61B5/05A61B5/145A61B5/1459A61B10/00A61B17/00A61B19/00G01N21/27
CPCA61B5/0066A61B5/0071A61B5/0075A61B5/0084A61B5/061A61B2562/0242A61B5/6848A61B5/6885A61B2017/00796A61B2019/462A61B5/145A61B2090/062
Inventor HULAR, RICHARDDA SILVA, LUIZCHASE, CHARLES
Owner BIOLUMINATE
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