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WO1990001293A1 - Sonde f×tale - Google Patents

Sonde f×tale Download PDF

Info

Publication number
WO1990001293A1
WO1990001293A1 PCT/GB1989/000934 GB8900934W WO9001293A1 WO 1990001293 A1 WO1990001293 A1 WO 1990001293A1 GB 8900934 W GB8900934 W GB 8900934W WO 9001293 A1 WO9001293 A1 WO 9001293A1
Authority
WO
WIPO (PCT)
Prior art keywords
probe
fetal
scalp
grip
lead
Prior art date
Application number
PCT/GB1989/000934
Other languages
English (en)
Inventor
Jason Otto Gardosi
Original Assignee
Jason Otto Gardosi
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 Jason Otto Gardosi filed Critical Jason Otto Gardosi
Publication of WO1990001293A1 publication Critical patent/WO1990001293A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/1464—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue using optical sensors, e.g. spectral photometrical oximeters specially adapted for foetal tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue
    • A61B5/14542—Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue for measuring blood gases
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
    • A61B5/283—Invasive
    • A61B5/288—Invasive for foetal cardiography, e.g. scalp electrodes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/43—Detecting, measuring or recording for evaluating the reproductive systems
    • A61B5/4306—Detecting, measuring or recording for evaluating the reproductive systems for evaluating the female reproductive systems, e.g. gynaecological evaluations
    • A61B5/4343—Pregnancy and labour monitoring, e.g. for labour onset detection
    • A61B5/4362—Assessing foetal parameters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6879—Means for maintaining contact with the body
    • A61B5/6882—Anchoring means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2503/00—Evaluating a particular growth phase or type of persons or animals
    • A61B2503/02—Foetus

Definitions

  • This invention relates to obstetrics and more particularly to fetal probes.
  • a second diode acts as a photodetector and the energy of the received light at two different wavelengths is computed to show the P 0- .
  • the pulse is also recorded through the receiving diode and the peak of the pulse wave is correlated with the incoming light thus preferentially recording the oxygen saturation of arterial blood.
  • transcutaneous sensors are either placed to transilluminate tissue, e.g. on a finger or, more recently, adapted to also measure reflected light, e.g. on the patient's forehead. Good contact is essential for reliable readings, and on an external surface the device can be easily held down or secured e.g. with adhesive tape.
  • the present invention consists in one aspect in a fetal probe comprising a probe body with a probe surface adapted to be positioned in flat-wise contact with the fetal scalp, photo transmitter/receiver means provided in the probe at said surface for use in determining fetal blood oxygenation through light absorption; fastener means for releasably holding said probe surface in flat-wise contact with the fetal scalp; electrode means provided in the body for establishing electrical contact with the scalp for electrocardiography and a probe lead extending from the body and establishing electrical contact with said photo transmitter/receiver means and said electrode means.
  • said fastener means comprises at least one metal spur oveable relatively to the probe body to pierce and to grip scalp skin.
  • the probe is held in place by two thin curved metal wires on either end of the diodes or other photo transmitter/receiver means.
  • these two wires can be rotated simultaneously to embed superficially into the fetal skin.
  • the use of two wires at either end of the probe gives stability and good contact between the probe surface and the fetal scalp. This stability is essential for reliable measurement of oxygen saturation.
  • a preferred feature of the invention is that both the metal wires which attach to the fetal scalp can act as electrodes through which a strong, reliable signal can be obtained for continuous electrocardiographic monitoring of the fetus.
  • a strong fetal heart signal is not only important for continuous CTG monitoring, but at the same time it improves pulse oximetry which depends on coordination of measured oxygen saturation with the peak of the fetal pulse.
  • the fastener means comprises means for dispensing adhesive.
  • the present invention consists in a fetal probe comprising a probe body with a probe surface adapted to be positioned in flat-wise contact with the fetal scalp; sensor means provided in the body at said surface for use in monitoring fetal parameters; fastener means for releasably holding said probe surface in flat-wise contact with the fetal scalp and a probe lead extending from the body and establishing electrical contact with said sensor means, wherein said fastener means comprises a pair of metal spurs positioned at opposite sides of said sensor means each being remotely actuable through the probe lead to pierce and to grip fetal scalp skin thereby to retain said sensor means in a generally stable configuration with relation to the fetal scalp.
  • Figure 1 is a side view of a fetal probe according to this invention.
  • Figure 2 is a plan view of the probe of Figure 1;
  • Figures 3 to 6 are views showing respective component parts of the probe of Figure 1;
  • FIGS. 8 and 9 are plan views of three different further embodiments of fetal probe' according to this invention.
  • FIG 10 is a block diagram illustrating the interconnection of a fetal probe according to this invention with monitoring equipment.
  • a probe according to this invention has a probe body 10 formed of matching component parts 12 and 14. These are moulded from an appropriate plastics material.
  • the base part 12 is formed with recesses 16 and 18 shaped to receive, respectively, a light emitting diode 20 and a photo diode 22.
  • a central channel 24 in the base part 12 opens to one end of the base part and communicates with semi-circular grooves 26 formed at respective opposite sides of the recesses 16, 18.
  • a wire 28 lies in the channel 24 with arcuate spurs 30 formed on the wire 28 being received respectively in the semi-cirdular grooves 26.
  • the spur 30 at the end of the wire 28 can conveniently be formed integrally with the wire; the other spur 30 is formed with a wire stub _2 bonded in a suitable fashion to the wire 28.
  • This method of construction has the advantage of providing torsional stiffness in that region of the wire lying within the probe body 10.
  • the cover part 14 of the probe body is formed with windows 3 which are in register with the LED 20 and the photo diode 22 , respectively.
  • the probe lead 38 comprises a cylindrical section 40 which surrounds the wire 28 and which may, for example, be of a coiled spring construction.
  • the end of the lead section 40 adjacent the probe body is provided with an anchoring pin 42 which is received in a recess (not shown) within the probe body to prevent relative rotation between the lead section 40 and the probe body.
  • a rotatable collar 44 At the opposite end of the lead section 40, there is provided a rotatable collar 44. By rotation of this collar, the wire 28 and therefore the spurs 30 can be rotated relatively to the probe body.
  • the arrangement is such that in the rest position, the spurs 30 take the position shown in Figure 2, that is to say fully extended from the probe body. Rotation of the collar 44 acts against the torsional resistance in the wire to retract the spurs 30 into the semi-circular grooves 26.
  • the probe body 10 is positioned on the fetal scalp.
  • the probe surface 46 is slightly concave to conform with the curvature of the fetal head.
  • the collar 44 is rotated to retract the two spurs 30 and allow the probe body to move into flat-wise contact with the fetal scalp skin.
  • the collar 44 is released allowing the spurs, under the action of the torsional resilience of the wire, to pierce the scalp skin superficially.
  • the printer within the fetal heart monitor is conveniently arranged to produce three separate traces: an ECG trace 6 and oxygen saturation trace 58 and a tocograph 60. It will be recognised that the combination within a single probe of, essentially, an oximetry sensor and an ECG electrode, offers important clinical advantages.
  • the use of two metal spurs to hold the probe surface in flat wise contact with the fetal scalp enables reliable oximetry measurements to be made.
  • advantage can be taken of this effect in fetal probes utilising sensors other than oximetry sensors and it will be possible in a modification to replace the LED 20 and photo diode 22 with, for example, a temperature sensor.
  • the probe body 10 in this embodiment is provided with a flexible cuff 60 about the periphery of probe surface 46. This cuff is compressed as the spur 30 is rotated into engagement with the fetal scalp skin and serves both to stabilise the probe body and to prevent foreign matter entering between the probe surface and the fetal scalp.
  • the probe surface 46 contains a plate electrode 62 for ECG.
  • the probe surface 46 is provided with a channel 64 into which appropriate adhesive can be dispensed once the probe is correctly positioned on the fetal scalp.
  • a minor modification is illustrated in Figure 9 in which the ECG electrode 62 is positioned between the LED 20 and the photo diode 22.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Molecular Biology (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Pediatric Medicine (AREA)
  • Cardiology (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Pregnancy & Childbirth (AREA)
  • Gynecology & Obstetrics (AREA)
  • Reproductive Health (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

Une sonde f÷tale contient à la fois une électrode d'ECG (électrocardiogramme) ainsi qu'un moyen photo émetteur-récepteur mesurant l'oxygénation du sang f÷tal par l'absorption de lumière. L'électrode peut se présenter sous la forme d'une paire d'éperons métalliques pouvant être actionnés à distance le long du fil de la sonde afin de percer et de saisir la peau du cuir chevelu f÷tal.
PCT/GB1989/000934 1988-08-12 1989-08-14 Sonde f×tale WO1990001293A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8819304 1988-08-12
GB888819304A GB8819304D0 (en) 1988-08-12 1988-08-12 Fetal oximeter electrode

Publications (1)

Publication Number Publication Date
WO1990001293A1 true WO1990001293A1 (fr) 1990-02-22

Family

ID=10642105

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1989/000934 WO1990001293A1 (fr) 1988-08-12 1989-08-14 Sonde f×tale

Country Status (4)

Country Link
EP (1) EP0433327A1 (fr)
AU (1) AU4185389A (fr)
GB (1) GB8819304D0 (fr)
WO (1) WO1990001293A1 (fr)

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991015151A1 (fr) * 1990-04-04 1991-10-17 Nellcor Incorporated Sonde d'oxymetrie de pouls perinatal
WO1991018549A1 (fr) * 1990-05-29 1991-12-12 Yue Samuel K Appareil a sonde foetale
EP0471898A1 (fr) * 1990-08-22 1992-02-26 Nellcor Incorporated Appareil d'oximètre à impulsion d'un foetus et méthode d'utilisation
US5109849A (en) * 1983-08-30 1992-05-05 Nellcor, Inc. Perinatal pulse oximetry sensor
US5529064A (en) * 1993-02-16 1996-06-25 Rall; Gerhard Sensor device for measuring vital parameters of a fetus during labor and delivery
WO1996041566A2 (fr) 1995-06-09 1996-12-27 Cybro Medical Ltd. Procede, capteur et dispositif d'oxymetrie optique du sang
US5746212A (en) * 1992-03-20 1998-05-05 Rall; Gerhard Process and device for measuring vital fetal parameters during labor and delivery
US5839439A (en) * 1995-11-13 1998-11-24 Nellcor Puritan Bennett Incorporated Oximeter sensor with rigid inner housing and pliable overmold
US5911690A (en) * 1994-12-01 1999-06-15 Reinhold Kintza Use of a pulse oxymetry sensor device
WO2000016685A1 (fr) * 1998-09-18 2000-03-30 U.S. Army Institute Of Surgical Research Ensemble capteur de sphygmo-oxymetre auto-perçant
US6253098B1 (en) 1998-09-09 2001-06-26 The United States Of America As Represented By The Secretary Of The Army Disposable pulse oximeter assembly and protective cover therefor
US6256524B1 (en) 1998-09-09 2001-07-03 The United States Of America As Represented By The Secretary Of The Army Pulse oximeter sensor combined with a combination oropharyngeal airway and bite block
US6263223B1 (en) 1998-09-09 2001-07-17 The United States Of America As Represented By The Secretary Of The Army Method for monitoring arterial oxygen saturation
US6266547B1 (en) 1998-09-09 2001-07-24 The United States Of America As Represented By The Secretary Of The Army Nasopharyngeal airway with reflectance pulse oximeter sensor
US6470200B2 (en) 2000-02-11 2002-10-22 The United States Of America As Represented By The Secretary Of The Army Pacifier pulse oximeter sensor
GB2410442A (en) * 2004-01-28 2005-08-03 Surgicraft Ltd Foetal scalp electrode with orientation marking
US7477924B2 (en) 2006-05-02 2009-01-13 Nellcor Puritan Bennett Llc Medical sensor and technique for using the same
US7483731B2 (en) 2005-09-30 2009-01-27 Nellcor Puritan Bennett Llc Medical sensor and technique for using the same
US7486979B2 (en) 2005-09-30 2009-02-03 Nellcor Puritan Bennett Llc Optically aligned pulse oximetry sensor and technique for using the same
US7499740B2 (en) 2004-02-25 2009-03-03 Nellcor Puritan Bennett Llc Techniques for detecting heart pulses and reducing power consumption in sensors
US7522948B2 (en) 2006-05-02 2009-04-21 Nellcor Puritan Bennett Llc Medical sensor and technique for using the same
US7555327B2 (en) 2005-09-30 2009-06-30 Nellcor Puritan Bennett Llc Folding medical sensor and technique for using the same
US7574245B2 (en) 2006-09-27 2009-08-11 Nellcor Puritan Bennett Llc Flexible medical sensor enclosure
US7574244B2 (en) 2005-08-08 2009-08-11 Nellcor Puritan Bennett Llc Compliant diaphragm medical sensor and technique for using the same
US7590439B2 (en) 2005-08-08 2009-09-15 Nellcor Puritan Bennett Llc Bi-stable medical sensor and technique for using the same
US7684842B2 (en) 2006-09-29 2010-03-23 Nellcor Puritan Bennett Llc System and method for preventing sensor misuse
US8219170B2 (en) 2006-09-20 2012-07-10 Nellcor Puritan Bennett Llc System and method for practicing spectrophotometry using light emitting nanostructure devices
US8265724B2 (en) 2007-03-09 2012-09-11 Nellcor Puritan Bennett Llc Cancellation of light shunting
US8280469B2 (en) 2007-03-09 2012-10-02 Nellcor Puritan Bennett Llc Method for detection of aberrant tissue spectra
US8364220B2 (en) 2008-09-25 2013-01-29 Covidien Lp Medical sensor and technique for using the same
US8600469B2 (en) 2005-09-29 2013-12-03 Covidien Lp Medical sensor and technique for using the same
US8914088B2 (en) 2008-09-30 2014-12-16 Covidien Lp Medical sensor and technique for using the same
US8965473B2 (en) 2005-09-29 2015-02-24 Covidien Lp Medical sensor for reducing motion artifacts and technique for using the same
EP4103059A4 (fr) * 2020-03-24 2024-07-03 Raydiant Oximetry, Inc. Systèmes, dispositifs, et procédés pour effectuer une oxymétrie foetale et/ou une oxymétrie de pouls foetale à l'aide d'une sonde d'oxymétrie foetale transvaginale, d'une sonde d'oxymétrie foetale transcervicale et/ou d'une onde d'oxymétrie foetale transurétrale

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2042898A (en) * 1979-02-28 1980-10-01 Showell A W Sugicraft Ltd Foetal Scalp Electrode
DE2930663A1 (de) * 1979-07-28 1981-02-19 Hellige Gmbh Messwertaufnehmer fuer die bestimmung physiologischer groessen des menschlichen oder tierischen koerpers
US4281659A (en) * 1979-03-12 1981-08-04 Roche Medical Electronics Inc. Applying and securing percutaneous or transcutaneous probes to the skin especially for fetal monitoring
EP0104619A2 (fr) * 1982-09-24 1984-04-04 Abbott Laboratories Electrode ECG en spirale combinée avec un capteur de pH
EP0135840A2 (fr) * 1983-08-30 1985-04-03 Nellcor Incorporated Oxymètre à usage périnatologique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2042898A (en) * 1979-02-28 1980-10-01 Showell A W Sugicraft Ltd Foetal Scalp Electrode
US4281659A (en) * 1979-03-12 1981-08-04 Roche Medical Electronics Inc. Applying and securing percutaneous or transcutaneous probes to the skin especially for fetal monitoring
DE2930663A1 (de) * 1979-07-28 1981-02-19 Hellige Gmbh Messwertaufnehmer fuer die bestimmung physiologischer groessen des menschlichen oder tierischen koerpers
EP0104619A2 (fr) * 1982-09-24 1984-04-04 Abbott Laboratories Electrode ECG en spirale combinée avec un capteur de pH
EP0135840A2 (fr) * 1983-08-30 1985-04-03 Nellcor Incorporated Oxymètre à usage périnatologique

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5109849A (en) * 1983-08-30 1992-05-05 Nellcor, Inc. Perinatal pulse oximetry sensor
US5099842A (en) * 1988-10-28 1992-03-31 Nellcor Incorporated Perinatal pulse oximetry probe
WO1991015151A1 (fr) * 1990-04-04 1991-10-17 Nellcor Incorporated Sonde d'oxymetrie de pouls perinatal
WO1991018549A1 (fr) * 1990-05-29 1991-12-12 Yue Samuel K Appareil a sonde foetale
US5551424A (en) * 1990-05-29 1996-09-03 Phox Medical Optics, Inc. Fetal probe apparatus
US6671530B2 (en) 1990-08-22 2003-12-30 Nellcor Puritan Bennett Incorporated Positioning method for pulse oximetry fetal sensor
EP0471898A1 (fr) * 1990-08-22 1992-02-26 Nellcor Incorporated Appareil d'oximètre à impulsion d'un foetus et méthode d'utilisation
US5228440A (en) * 1990-08-22 1993-07-20 Nellcor, Inc. Fetal pulse oximetry apparatus and method of use
US5746212A (en) * 1992-03-20 1998-05-05 Rall; Gerhard Process and device for measuring vital fetal parameters during labor and delivery
US5529064A (en) * 1993-02-16 1996-06-25 Rall; Gerhard Sensor device for measuring vital parameters of a fetus during labor and delivery
US5911690A (en) * 1994-12-01 1999-06-15 Reinhold Kintza Use of a pulse oxymetry sensor device
WO1996041566A2 (fr) 1995-06-09 1996-12-27 Cybro Medical Ltd. Procede, capteur et dispositif d'oxymetrie optique du sang
US5839439A (en) * 1995-11-13 1998-11-24 Nellcor Puritan Bennett Incorporated Oximeter sensor with rigid inner housing and pliable overmold
US6253098B1 (en) 1998-09-09 2001-06-26 The United States Of America As Represented By The Secretary Of The Army Disposable pulse oximeter assembly and protective cover therefor
US6256524B1 (en) 1998-09-09 2001-07-03 The United States Of America As Represented By The Secretary Of The Army Pulse oximeter sensor combined with a combination oropharyngeal airway and bite block
US6263223B1 (en) 1998-09-09 2001-07-17 The United States Of America As Represented By The Secretary Of The Army Method for monitoring arterial oxygen saturation
US6266547B1 (en) 1998-09-09 2001-07-24 The United States Of America As Represented By The Secretary Of The Army Nasopharyngeal airway with reflectance pulse oximeter sensor
US6144867A (en) * 1998-09-18 2000-11-07 The United States Of America As Represented By The Secretary Of The Army Self-piercing pulse oximeter sensor assembly
AU754375B2 (en) * 1998-09-18 2002-11-14 Government Of The United States Of America As Represented By The Secretary Of The Army Self-piercing pulse oximeter sensor assembly
WO2000016685A1 (fr) * 1998-09-18 2000-03-30 U.S. Army Institute Of Surgical Research Ensemble capteur de sphygmo-oxymetre auto-perçant
US6470200B2 (en) 2000-02-11 2002-10-22 The United States Of America As Represented By The Secretary Of The Army Pacifier pulse oximeter sensor
GB2410442A (en) * 2004-01-28 2005-08-03 Surgicraft Ltd Foetal scalp electrode with orientation marking
GB2410442B (en) * 2004-01-28 2005-12-07 Surgicraft Ltd Fetal scalp electrodes
US7499740B2 (en) 2004-02-25 2009-03-03 Nellcor Puritan Bennett Llc Techniques for detecting heart pulses and reducing power consumption in sensors
US7590439B2 (en) 2005-08-08 2009-09-15 Nellcor Puritan Bennett Llc Bi-stable medical sensor and technique for using the same
US7574244B2 (en) 2005-08-08 2009-08-11 Nellcor Puritan Bennett Llc Compliant diaphragm medical sensor and technique for using the same
US8965473B2 (en) 2005-09-29 2015-02-24 Covidien Lp Medical sensor for reducing motion artifacts and technique for using the same
US8600469B2 (en) 2005-09-29 2013-12-03 Covidien Lp Medical sensor and technique for using the same
US7483731B2 (en) 2005-09-30 2009-01-27 Nellcor Puritan Bennett Llc Medical sensor and technique for using the same
US7486979B2 (en) 2005-09-30 2009-02-03 Nellcor Puritan Bennett Llc Optically aligned pulse oximetry sensor and technique for using the same
US7555327B2 (en) 2005-09-30 2009-06-30 Nellcor Puritan Bennett Llc Folding medical sensor and technique for using the same
US7522948B2 (en) 2006-05-02 2009-04-21 Nellcor Puritan Bennett Llc Medical sensor and technique for using the same
US7477924B2 (en) 2006-05-02 2009-01-13 Nellcor Puritan Bennett Llc Medical sensor and technique for using the same
US8219170B2 (en) 2006-09-20 2012-07-10 Nellcor Puritan Bennett Llc System and method for practicing spectrophotometry using light emitting nanostructure devices
US8315685B2 (en) 2006-09-27 2012-11-20 Nellcor Puritan Bennett Llc Flexible medical sensor enclosure
US7574245B2 (en) 2006-09-27 2009-08-11 Nellcor Puritan Bennett Llc Flexible medical sensor enclosure
US7684842B2 (en) 2006-09-29 2010-03-23 Nellcor Puritan Bennett Llc System and method for preventing sensor misuse
US8265724B2 (en) 2007-03-09 2012-09-11 Nellcor Puritan Bennett Llc Cancellation of light shunting
US8280469B2 (en) 2007-03-09 2012-10-02 Nellcor Puritan Bennett Llc Method for detection of aberrant tissue spectra
US8364220B2 (en) 2008-09-25 2013-01-29 Covidien Lp Medical sensor and technique for using the same
US8914088B2 (en) 2008-09-30 2014-12-16 Covidien Lp Medical sensor and technique for using the same
EP4103059A4 (fr) * 2020-03-24 2024-07-03 Raydiant Oximetry, Inc. Systèmes, dispositifs, et procédés pour effectuer une oxymétrie foetale et/ou une oxymétrie de pouls foetale à l'aide d'une sonde d'oxymétrie foetale transvaginale, d'une sonde d'oxymétrie foetale transcervicale et/ou d'une onde d'oxymétrie foetale transurétrale

Also Published As

Publication number Publication date
GB8819304D0 (en) 1988-09-14
EP0433327A1 (fr) 1991-06-26
AU4185389A (en) 1990-03-05

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