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WO2003073934A1 - Systeme de detection - Google Patents

Systeme de detection Download PDF

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Publication number
WO2003073934A1
WO2003073934A1 PCT/GB2003/000945 GB0300945W WO03073934A1 WO 2003073934 A1 WO2003073934 A1 WO 2003073934A1 GB 0300945 W GB0300945 W GB 0300945W WO 03073934 A1 WO03073934 A1 WO 03073934A1
Authority
WO
WIPO (PCT)
Prior art keywords
detection sensor
swab
surgical instrument
magnetic material
detecting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB2003/000945
Other languages
English (en)
Inventor
Lee Edwards
Ara Darzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ip2ipo Innovations Ltd
Original Assignee
Imperial College Innovations Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Imperial College Innovations Ltd filed Critical Imperial College Innovations Ltd
Priority to AU2003209466A priority Critical patent/AU2003209466A1/en
Priority to EP03743439A priority patent/EP1538982A1/fr
Publication of WO2003073934A1 publication Critical patent/WO2003073934A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
    • A61B5/0507—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves using microwaves or terahertz waves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/06—Devices, other than using radiation, for detecting or locating foreign bodies ; Determining position of diagnostic devices within or on the body of the patient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/39—Markers, e.g. radio-opaque or breast lesions markers

Definitions

  • the present invention relates to surgical swabs and methods for detecting surgical swabs and instruments during or following surgery.
  • Medical swabs are generally made of absorbent, multi-layered cotton or cotton/lint-based material with a woven in PNC thread, coated in 55 % Barium Phosphate, which is detectable under X ray.
  • EP 0 244 992 describes a process of manufacturing swabs to include a layer of X ray detectable material, allowing the detection of retained swabs under X ray control.
  • Suture needles and instruments are most commonly made of high grade 622-625 surgical steel, and are magnetic.
  • the present invention provides alternative detection systems suitable for routine practice or as a method for preventive retained item scanning and swabs suitable for use in such detection systems.
  • a first aspect of the invention provides a method for detecting and/or locating within a body cavity (or otherwise during a surgical operation) a swab or surgical instrument (which may be a needle) which comprises a metal (material with high electrical conductivity) or magnetic material (or less preferably other detectable material), the method comprising the step of passing a detection sensor over the wound site, wherein the method does not involve the use of X-ray radiation.
  • the detection sensor comprises a multi sensor array.
  • a single sensor is considered sufficient to provide useful information.
  • the multi sensor approach would allow individual sensors to be tuned at different frequencies (which may allow more detailed positional information to be obtained) and may allow wider beam spread. Multiple sensors may provide a more accurate location indication, which may be useful in larger cavities.
  • the detection sensor is not intended to be inserted into the body.
  • the method indicates the presence or possibly the number of marked swabs or other metallic items within the wound or cavity body cavity. It is preferred that the detection sensor is capable of detecting magnetic materials, for example surgical steel. The detection sensor may preferably generate and/or detect microwave radiation.
  • the detection sensor may employ ultrasonic, radio/wireless proximity, thermal, luminescence, infrared, piezoelectric or fmoroscopy methods.
  • the detection sensor has the following properties: 1. it is preferably in the form of a 'wand' which may be passed over the wound site
  • It preferably has an audible and/or visible and/or vibrating warning system ie provides an audible or visible signal when a metallic or magnetic material is detected.
  • the senor is preferably of a construction that will allow it to be fully sterilised (autoclaveable) or sheathed with a sterile covering (which may be purpose- designed for the sensor, and which may be disposable). 5. Alternatively or in addition the sensor may be fully disposable.
  • Suitable detection sensors may be based on metal detector instruments used in law enforcement or security operations (for example in airport security), for example adapted to be sterilisable or to have a sterile covering, as discussed above. Such instruments will be well known to those skilled in the art.
  • WO 01/51948 relates to a hand-mounted instrument and describes other instruments, for example in the form of wands. Such instruments may be particularly suitable for use in the present invention.
  • US 5,936,586 and US 2002/0017904 also describe non-metal and metal detection instruments embodying principles which may be useful in instruments for use in the present invention.
  • the senor comprises a (preferably battery operated and hand portable) wave guide (A) which includes a microwave oscillator for generating microwaves and (at least) two resonating slots on a wall of the wave-guide, and a microwave detector capable of detecting reflected microwaves.
  • A preferably battery operated and hand portable wave guide
  • Suitable detection sensors may also be based on Electronic Article Surveillance (EAS) systems used in retail environments. These have the advantage that they are designed to be substantially unaffected by the presence of steel or ferromagnetic objects such as the operating theatre bed structure.
  • EAS Electronic Article Surveillance
  • One embodiment of such a sensor system uses tags made of a soft magnetic material that is easily saturated.
  • the detector contains a coil which generates a low (a few kHz) frequency alternating magnetic field.
  • the tag magnetisation is a clipped waveform rich in harmonics which are detected by a receive coil in the detector.
  • the tags can be in a number of forms, but typically can be a thin foil laminate either in a patch or in a thread about 1mm wide.
  • the senor comprises a transmit coil and a receive coil, connected to a battery operated transmit and receive circuit capable of detecting harmonics in the magnetisation of the tag.
  • a second (or further) detection sensor (which may also comprise a multi- sensor array) may be used. This may preferably be positioned on the opposite side of the patient to the first detection sensor. For example, the second detection sensor may be placed underneath the patient whilst the first detection sensor is used above (including to the side of) the patient.
  • the second or further detection sensor may be oriented so that its multi- sensor array is rotated relative to the multi-sensor array of the first detection sensor.
  • two or more detection sensors may be useful in creating a constant detection zone, for example by combining the signals received from the two or more detection sensors or multi-sensor arrays, as well known to those skilled in the art.
  • a re-useable mat comprising a second multi- sensor array may be placed underneath the patient (Fig 2).
  • the array may be similar to that in the first detection sensor but constructed to be 180 degrees out-of-phase. This arrangement may create a constant 'detection zone'.
  • a still further aspect of the invention provides a detection sensor as defined above for use in medicine.
  • a still further aspect of the invention provides a detection sensor as defined above for use in a method for detecting and/or locating within a body cavity (or otherwise during a surgical procedure) a swab or surgical instrument which comprises a metal or magnetic material (or other detectable material).
  • a further aspect of the invention provides a detection sensor as defined above in the form of a mat.
  • the invention provides a mat comprising a detection sense, preferably comprising a multi-sensor array.
  • a further aspect of the invention provides a swab or surgical instrument which comprises a metal or magnetic material (or other detectable material) for use in a method for detecting and/or locating within a body cavity (or otherwise during a surgical procedure) the swab or surgical instrument, the method comprising the step of passing a detection sensor over the wound site, wherein the method does not involve the use of X-ray radiation.
  • the detection sensor preferably comprises a multi sensor array, as discussed above.
  • a further aspect of the invention provides a surgical swab comprising a magnetic material.
  • the magnetic material does not comprise a noble metal, such as gold or silver as described in GB 805082.
  • the magnetic material preferably comprises paramagnetic atoms or ions, for example comprises Fe, Co or Ni atoms or ions (which are ferromagnetic elements).
  • the magnetic material may preferably comprise a ferromagnetic compound, for example a ferromagnetic compound listed in the CRC Handbook of Chemistry and Physics, 82 nd Edition 2001-2002 CRC Press LLC, Ed David R Lide. Magnetic materials are discussed extensively in the CRC Handbook (supra) and in references cited therein.
  • the magnetic material is or comprises stainless steel, preferably surgical grade stainless steel, for example 622-625 stainless steel.
  • the magnetic material or (in relation to the first aspect of the invention) metallic material or other detectable material may be incorporated in or round a thread embedded in the swab (which term includes any surgical dressing) structure.
  • medical and surgical swabs generally have a PNC thread, coated in 55 % Barium Phosphate woven into the swab.
  • the Barium Phosphate coating may be replaced by a metallic coating (Fig 1).
  • This metallic coating (or other detectable material) allows detection via multi-sensor sensing devices including: a. Magnetic; b. Ultrasonic; c. Radio/wireless proximity; d.
  • the thread may be woven into the gauze during manufacture of the swab or it may be sewn through the finished gauze or glued or otherwise attached thereto.
  • the magnetic material may consist of a low-coercivity alloy such as AtalanteTM (Bekaert NDS n.v.Sputtered Films, Karreweg 18,B - 9870 Zulte, Belgium, with a coercivity typically less than 1 Oersted. This is available as a thin (less than 1 micron) layer sputtered onto a flexible polymer substrate.
  • AtalanteTM Bekaert NDS n.v.Sputtered Films, Karreweg 18,B - 9870 Zulte, Belgium
  • the magnetic material or metal is non-toxic, unaffected by sterilisation and by body fluids (or less preferably is coated or contained in such a material), incapable of causing abrasion or irritation, non-fraying and flexible. It is further desirable that it is easily obtainable and manipulable and is preferably cheap. In the case of steel needles and other foreign bodies, it may be necessary to coat the items with a thin layer of soft magnetic material if the harmonic magnetic field detection system is used.
  • a further aspect of the invention provides a method for making a swab of the invention, comprising the step of incorporating a magnetic material into the swab.
  • the magnetic material may be incorporated during formation of the material from which the swab is constructed, after formation of the material but before the swab is assembled, or after assembly of the structure of the swab.
  • the magnetic material is incorporated on a thread on which the magnetic material is coated.
  • a further aspect of the invention provides a swab of the invention for use in medicine.
  • a still further aspect of the invention provides a swab of the invention for use in a method for detecting and/or locating within a body cavity the swab or surgical instrument, the method comprising the step of passing a detection sensor over the wound site, wherein the method does not involve the use of X-ray radiation.
  • the detection sensor comprises a multi sensor array.
  • Fig 2 If a foreign body (metal needle/instrument) or Swab manufactured with a flexible, metal coated PNC thread, is within Zone 'C it will create interference with one of the radiating slots and result in a signal being sent from the detecting diode resulting in an alarm signal (audio/visual). If no metallic or foreign bodies are within Zone 'C the balance of A and B is maintained causing no resultant alarm signal.
  • Example 1 Patient monitoring during surgery.
  • surgeon or an assistant scans the surgical zone prior to wound closer. This may be done in conjunction with existing swab and instrument checks.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Veterinary Medicine (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Human Computer Interaction (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

L'invention a trait à un procédé de détection et/ou de repérage, dans une cavité corporelle, d'un tampon ou d'un instrument chirurgical consistant en une matière métallique ou magnétique ou en une autre matière détectable. Ce procédé consiste à passer un détecteur au-dessus de la plaie, le détecteur comprenant de préférence une mosaïque de capteurs et le procédé ne comportant pas l'utilisation de rayons X. Deux détecteurs peuvent être utilisés ; l'un pouvant être en forme de tapis réutilisable placé sous le patient, et l'autre pouvant être en forme de dispositif portatif ou de baguette. Le tampon peut comprendre un fil présentant un revêtement métallique.
PCT/GB2003/000945 2002-03-06 2003-03-06 Systeme de detection Ceased WO2003073934A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003209466A AU2003209466A1 (en) 2002-03-06 2003-03-06 Detection system
EP03743439A EP1538982A1 (fr) 2002-03-06 2003-03-06 Systeme de detection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0205188.6A GB0205188D0 (en) 2002-03-06 2002-03-06 Detection system
GB0205188.6 2002-03-06

Publications (1)

Publication Number Publication Date
WO2003073934A1 true WO2003073934A1 (fr) 2003-09-12

Family

ID=9932349

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2003/000945 Ceased WO2003073934A1 (fr) 2002-03-06 2003-03-06 Systeme de detection

Country Status (4)

Country Link
EP (1) EP1538982A1 (fr)
AU (1) AU2003209466A1 (fr)
GB (1) GB0205188D0 (fr)
WO (1) WO2003073934A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004078039A1 (fr) * 2003-03-07 2004-09-16 Philips Intellectual Property & Standards Gmbh Dispositif et procede destines a localiser un instrument dans un corps
WO2007120736A3 (fr) * 2006-04-11 2008-10-02 Medical D Tect Or Llc Système de détection de corps étrangers
US9168104B2 (en) 2008-06-23 2015-10-27 John Richard Dein Intra-operative system for identifying and tracking surgical sharp objects, instruments, and sponges
US9414973B2 (en) 2006-09-13 2016-08-16 Stryker Combo L.L.C. Apparatus and methods for monitoring objects in a surgical field
US9690963B2 (en) 2015-03-02 2017-06-27 Covidien Lp Hand-held dual spherical antenna system
US9717565B2 (en) 2015-01-21 2017-08-01 Covidien Lp Wirelessly detectable objects for use in medical procedures and methods of making same
US9730850B2 (en) 2008-10-28 2017-08-15 Covidien Lp Method and apparatus to detect transponder tagged objects, for example during medical procedures
US9763742B2 (en) 2008-10-28 2017-09-19 Covidien Lp Wirelessly detectable objects for use in medical procedures and methods of making same
US9814540B2 (en) 2014-03-31 2017-11-14 Covidien Lp Method, apparatus and article for detection of transponder tagged objects, for example during surgery
US10193209B2 (en) 2015-04-06 2019-01-29 Covidien Lp Mat based antenna and heater system, for use during medical procedures
US10339269B2 (en) 2014-03-31 2019-07-02 Covidien Lp Hand-held spherical antenna system to detect transponder tagged objects, for example during surgery
US10660726B2 (en) 2015-01-21 2020-05-26 Covidien Lp Sterilizable wirelessly detectable objects for use in medical procedures and methods of making same
US10722323B2 (en) 2009-11-23 2020-07-28 Covidien Lp Method and apparatus to account for transponder tagged objects used during medical procedures
US10874560B2 (en) 2015-01-21 2020-12-29 Covidien Lp Detectable sponges for use in medical procedures and methods of making, packaging, and accounting for same
USD1051399S1 (en) 2021-02-26 2024-11-12 Stryker Corporation Reader cradle for a surgical stand

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2434872A (en) * 2006-02-03 2007-08-08 Christopher Paul Hancock Microwave system for locating inserts in biological tissue

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002539A1 (fr) * 1984-11-01 1986-05-09 Pekka Johannes Nyberg Dispositif pour localiser des objets metalliques dans le corps humain ou animal
FR2624620A1 (fr) * 1987-12-10 1989-06-16 Imtec Sa Dispositif pour la detection d'objets etrangers au moins partiellement metalliques, notamment en milieu operatoire
US5090410A (en) * 1989-06-28 1992-02-25 Datascope Investment Corp. Fastener for attaching sensor to the body
US20010012915A1 (en) * 1996-06-25 2001-08-09 Avrin William F. Ferromagnetic foreign body detection using magnetics

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002539A1 (fr) * 1984-11-01 1986-05-09 Pekka Johannes Nyberg Dispositif pour localiser des objets metalliques dans le corps humain ou animal
FR2624620A1 (fr) * 1987-12-10 1989-06-16 Imtec Sa Dispositif pour la detection d'objets etrangers au moins partiellement metalliques, notamment en milieu operatoire
US5090410A (en) * 1989-06-28 1992-02-25 Datascope Investment Corp. Fastener for attaching sensor to the body
US20010012915A1 (en) * 1996-06-25 2001-08-09 Avrin William F. Ferromagnetic foreign body detection using magnetics

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004078039A1 (fr) * 2003-03-07 2004-09-16 Philips Intellectual Property & Standards Gmbh Dispositif et procede destines a localiser un instrument dans un corps
WO2007120736A3 (fr) * 2006-04-11 2008-10-02 Medical D Tect Or Llc Système de détection de corps étrangers
US12357412B2 (en) 2006-09-13 2025-07-15 Stryker Corporation Apparatus and methods for monitoring objects in a surgical field
US9414973B2 (en) 2006-09-13 2016-08-16 Stryker Combo L.L.C. Apparatus and methods for monitoring objects in a surgical field
US9530036B2 (en) 2006-09-13 2016-12-27 Stryker Combo L.L.C. Methods for monitoring objects in a surgical field
US9672397B2 (en) 2006-09-13 2017-06-06 Stryker Combo L.L.C. Apparatus and methods for monitoring objects in a surgical field
US11090129B2 (en) 2006-09-13 2021-08-17 Stryker Corporation Apparatus and methods for monitoring objects in a surgical field
US11116598B1 (en) 2006-09-13 2021-09-14 Stryker Corporation Apparatus and methods for monitoring objects in a surgical field
US10729510B2 (en) 2006-09-13 2020-08-04 Stryker Corporation Apparatus and methods for monitoring objects in a surgical field
US9974625B2 (en) 2006-09-13 2018-05-22 Stryker Combo L.L.C. Apparatus and methods for monitoring objects in a surgical field
US11963827B2 (en) 2006-09-13 2024-04-23 Stryker Corporation Apparatus and methods for monitoring objects in a surgical field
US11793591B2 (en) 2006-09-13 2023-10-24 Stryker Corporation Apparatus and methods for monitoring objects in a surgical field
US9168104B2 (en) 2008-06-23 2015-10-27 John Richard Dein Intra-operative system for identifying and tracking surgical sharp objects, instruments, and sponges
US10765563B2 (en) 2008-06-23 2020-09-08 John Richard Dein Intra-operative system for identifying and tracking surgical sharp objects, instruments, and sponges
US10595958B2 (en) 2008-10-28 2020-03-24 Covidien Lp Wirelessly detectable objects for use in medical procedures and methods of making same
US10369067B2 (en) 2008-10-28 2019-08-06 Covidien Lp Method and apparatus to detect transponder tagged objects, for example during medical procedures
US9763742B2 (en) 2008-10-28 2017-09-19 Covidien Lp Wirelessly detectable objects for use in medical procedures and methods of making same
US9730850B2 (en) 2008-10-28 2017-08-15 Covidien Lp Method and apparatus to detect transponder tagged objects, for example during medical procedures
US10722323B2 (en) 2009-11-23 2020-07-28 Covidien Lp Method and apparatus to account for transponder tagged objects used during medical procedures
US10339269B2 (en) 2014-03-31 2019-07-02 Covidien Lp Hand-held spherical antenna system to detect transponder tagged objects, for example during surgery
US9814540B2 (en) 2014-03-31 2017-11-14 Covidien Lp Method, apparatus and article for detection of transponder tagged objects, for example during surgery
US11238973B2 (en) 2014-03-31 2022-02-01 Covidien Lp Hand-held spherical antenna system to detect transponder tagged objects, for example during surgery
US9717565B2 (en) 2015-01-21 2017-08-01 Covidien Lp Wirelessly detectable objects for use in medical procedures and methods of making same
US11065081B2 (en) 2015-01-21 2021-07-20 Covidien Lp Sterilizable wirelessly detectable objects for use in medical procedures and methods of making same
US10874560B2 (en) 2015-01-21 2020-12-29 Covidien Lp Detectable sponges for use in medical procedures and methods of making, packaging, and accounting for same
US10660726B2 (en) 2015-01-21 2020-05-26 Covidien Lp Sterilizable wirelessly detectable objects for use in medical procedures and methods of making same
US12329592B2 (en) 2015-01-21 2025-06-17 Covidien Lp Sterilizable wirelessly detectable objects for use in medical procedures and methods of making same
US9690963B2 (en) 2015-03-02 2017-06-27 Covidien Lp Hand-held dual spherical antenna system
US10193209B2 (en) 2015-04-06 2019-01-29 Covidien Lp Mat based antenna and heater system, for use during medical procedures
USD1051399S1 (en) 2021-02-26 2024-11-12 Stryker Corporation Reader cradle for a surgical stand

Also Published As

Publication number Publication date
GB0205188D0 (en) 2002-04-17
AU2003209466A1 (en) 2003-09-16
EP1538982A1 (fr) 2005-06-15

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