US3847157A - Medico-surgical tube - Google Patents

Medico-surgical tube Download PDF

Info

Publication number
US3847157A
US3847157A US00370900A US37090073A US3847157A US 3847157 A US3847157 A US 3847157A US 00370900 A US00370900 A US 00370900A US 37090073 A US37090073 A US 37090073A US 3847157 A US3847157 A US 3847157A
Authority
US
United States
Prior art keywords
tube
structure according
ferromagnetic material
material
strip
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.)
Expired - Lifetime
Application number
US00370900A
Inventor
J Caillouette
P Johnson
Original Assignee
J Caillouette
P Johnson
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 J Caillouette, P Johnson filed Critical J Caillouette
Priority to US00370900A priority Critical patent/US3847157A/en
Application granted granted Critical
Publication of US3847157A publication Critical patent/US3847157A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0127Magnetic means; Magnetic markers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/70Manipulators specially adapted for use in surgery
    • A61B34/73Manipulators for magnetic surgery
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/06Devices, other than using radiation, for detecting or locating foreign bodies ; determining position of probes within or on the body of the patient
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/06Devices, other than using radiation, for detecting or locating foreign bodies ; determining position of probes within or on the body of the patient
    • A61B5/061Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body
    • A61B5/062Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body using magnetic field
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0108Steering means as part of the catheter or advancing means; Markers for positioning using radio-opaque or ultrasound markers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04Tracheal tubes
    • A61M16/0402Special features for tracheal tubes not otherwise provided for
    • A61M16/0411Special features for tracheal tubes not otherwise provided for with means for differentiating between oesophageal and tracheal intubation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04Tracheal tubes
    • A61M16/0488Mouthpieces; Means for guiding, securing or introducing the tubes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/02General characteristics of the apparatus characterised by a particular materials
    • A61M2205/0233Conductive materials, e.g. antistatic coatings for spark prevention
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/32General characteristics of the apparatus with radio-opaque indicia

Abstract

A tube structure is disclosed, for use within living tissue, incorporating a magnetic element whereby the location and length of the tube within tissue may be readily detected. In one disclosed form, the tube is seamless, flexible and is formed of non-fibrous imperforate material containing ferromagnetic material for magnetic detection. In the forms as disclosed, the ferromagnetic material comprises an integral metal strip, particulate or segments of material extending along the length of the tube. A separate grounding strip may also be included in a tube as disclosed, that is radio-opaque for X-ray detection. The tube generally is tapered to define a distal end. A magnetic detector for sensing the tube is also disclosed utilizing a movably supported gapped magnetic toroid.

Description

United States Patent 11 1 Caillouette et a1.

[ 1 Nov. 12, 1974 MEDICO-SURGICAL TUBE [76] Inventors: James C. Caillouette, 123 Congress [22] Filed: June 18, 1973 [21] Appl. No.: 370,900

1521 US. Cl. 128/348, 128/2 M, 138/118 511 111 .0 ..A61m 25/00 [58] Field of Search 128/348, 349 R, 349 B,

128/349 BV, 350 R, 351, 276, 2 M, 2 R, 1.3, 128/1.41.5, 356, 303 R; 138/118 OTHER PUBLICATIONS .RQeT ch- .Neteselum 1. C 675,

Morey Primary E.\'aminerDalton L. Truluck Attorney, Agent, or Firm-Nilsson, Robbins, Bissell, Dalgarn & Berliner [57] ABSTRACT A tube structure is disclosed, for use within living tissue, incorporating a magnetic element whereby the location and length of the tube within tissue may be readily detected. In one disclosed form, the tube is seamless, flexible and is formed of non-fibrous imperforate material containing ferromagnetic material for magnetic detection. In the forms as disclosed, the ferromagnetic material comprises an integral metal strip, particulate or segments of material extending along the length of the tube. A separate grounding strip may also be included in a tube as disclosed, that is radioopaque for X-ray detection. The tube generally is tapered to define a distal end. A magnetic detector for sensing the tube is also disclosed utilizing a movably supported gapped magnetic toroid.

9 Claims, 8 Drawing Figures MEDICO-SURGICAL TUBE BACKGROUND AND SUMMARY OF THE INVENTION The need frequently arises to place medico-surgical tubes, e.g., catheters, within various living-tissue spaces. In placing such tubes, it is sometimes critically important that the attending person have knowledge with respect to the precise location of the tube. In that regard, it previously has been proposed to provide tubes that are partially or completely X-ray opaque. In using such tubes, the precise position of a tube is indicated by X-ray presentations. However, a basic difficulty with such procedures and techniques resides in the complexity of the required equipment and a concern regarding repeated or prolonged X-ray irradiation of living tissue.

Generally, there is a substantial current trend toward increased activity by paramedical personnel in emergency situations. The risks attendant such practice are related to the limitations of paramedical personnel and the fact that they often must work in locations where only simple and rudimentary equipment is available. One pieceof equipment commonly provided for use by paramedical personnel is a medico-surgical'tube. For example, such tubes are often necessary to restore respiration for one reason or another. These considerations emphasize the need for a simple tube, the location and length of which within living tissue can be readily determined, without irradiating the tissue or utilizing other complex equipment.

Another consideration regarding medico-surgical tubes relates to the electrical characteristics. There is concern both with regard to electrical leakage currents from associated equipment that might endanger a patient and static electricity that may produce a sufficient spark to ignite combustible substances, e.g., gas. Fatal arrhythmias can result from either form of electrical activity. Accordingly, a need exists for a medicosurgical tube, the location of which is readily detectable as indicated above, and additionally which has certain electrical characteristics. Other desirable characteristics for a medico-surgical tube include flexibility and transparency to permit observing the tube interior.

In general, the present invention relates to a medicosurgical tube system whereby the location of a tube within living tissue may be simply, accurately and easily determined. Specifically, the system includes a tube of flexible, transparent imperforate material carrying a strip of continuous or discretely placed segments of magnetic material for actuating a magnetic indicator. In the disclosed embodiments, a strip of magnetic material is provided to extend along the length of the tube and comprises magnetizable material having a remanent magnetic flux density that is relatively high and which is magnetized with a pattern so as to be readily detected outside the living tissue. The magnetizable material may be provided in a form to accomplish desirable electrical characteristics or a separate conductive strip may be provided. The location of the tube is manifest by a movably mounted permanent magnet housed for convenient placement contiguous to the living tissue.

BRIEF DESCRIPTION OF THE DRAWING In the drawing, which constitutes a part of this specification, an exemplary embodiment demonstrating various objectives and features hereof is set forth as follows:

FIG. 1 is a diagrammatic view illustrative of the use of a system constructed in accordance with the present invention;

FIG. 2 is a plan view of one form oftube structure in accordance with the present invention;

FIG. 3 is an enlarged sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a view similar to FIG. 3 illustrating an alternative tube construction;

FIG. 5 is a view similar to FIG. 3 illustrating still another alternative tube construction;

FIG. 6 is a fragmentary view similar to FIG. 2 illustrating still a further alternative tube construction;

FIG. 7 is a plan view of an indicator constructed in accordance with the present invention; and

FIG. 8 is a central vertical sectional view taken through the indicator of FIG. 7.

DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENT As required, a detailed illustrative embodiment, deemed to be the best form of the invention for that purpose, is disclosed herein. The embodiment exemplifies the invention which may be constructed in various other forms, some of which may be quite different from the disclosed illustrative embodiment. However, specific structural and functional details disclosed herein are representative and in that regard provide a basis for the claims herein which define the scope of the invention.

Referring initially to FIG. 1, a human subject S is suggested along with indications of lungs L and air passages including a right bronchial tube 12, a left bronchial tube 14 and a trachea 16. Also, as indicated in FIG. 1, a medico-surgical tube T is shown passing through the trachea 16 and the right bronchial tube 12 to enter the right lung L. The position of the tube T is indicated by an indicator I which is as illustrated in FIG. 1, located on the chest of the subject S.

In considering an exemplary use of the present system, the tube T is placed within the subject S for the extraction of fluid from the lung cavity. It is to be recognized that the tube hereof is also useful in other ways, e.g., vascular, gastrointestinal, genitourinary, and so on. It is apparent that'the tube T may substantially close the receiving bronchial tube, e.g., bronchial tube 12. Frequently, a subject S has lost the use of one lung as a result of the accumulation of fluid. Consequently, if the tube T (being placed for the purpose of removing the fluid) enters the bronchial tube of the single functioning lung, the subject S may lose all breathing capacity.

In accordance with the system of the present invention, the position of the tube T is manifest by the indicator I during the period of insertion. If the tube deviates in an undesired direction, the fact is promptly end and a slight enlargement or flare at the opposed end 22. The taper at the distal end 20 is helpful in probing and additionally is cooperative in interconnecting a series of tubes.

The tube is smooth at both the internal wall 24 (FIG.

' 3) and the external wall 26. Continuing to view the tube in cross section (FIG. 3) a radial segment comprises a strip 28 (FIG. 2) extending the full length of the elongated tube T and fully occupying a space between the internal wall 24 and the external wall 26. The non-strip portion 30 of the tube may be formed of clear or transparent plastic to afford a view of the tube contents or may be radio opaque for X-ray detection. The strip 28 may comprise similar plastic containing a concentration of ferromagnetic particles. For example, fine particles of magnetic material comprising approximately 80 percent nickel and 20 percent iron may be employed to provide a strip with retentive magnetic characteristics. Generally, if the strip 28 is to render the tube T conductive, the concentration of the particles should be relatively high.

In reducing the tube T, extrusion techniques may be employed as to form vinyl plastic material. Such techniques are well known in the plastics industry and are not deemed significant for disclosure herein. After formation of the tube, the strip 28 is magnetized along the entire length of the tube T to attain a dominant magnetic pattern that has a uniform sense. For example, the magnetic pattern may be with the distal end 20 as the north pole of the magnet while the opposed end 22 is magnetized as the south pole. Of course, various magnetizing techniques may be employed to accomplish such a pattern, as for example, placing the ends of the tube T in alignment contiguous to the ends ofa powerful electromagnet so that the strip 28 is an element in a single magnetic circuit and is subjected to considerable magnetic flux.

In using the tube T after magnetization, it is signifcant that the magnetic field provided by the strip 28 as well as the inherent magnetic material in the strip provide the basis for sensing the location of the tube T. The sensor or indicator I as disclosed herein includes a housing 40 (FIG. 6) that is pointed along one plane, however, otherwise is of parallelepiped configuration. The upper surface 42 of the housing 40 provides an instrument display for indicating alignment with or position of the strip 28 in the tube T. As described, the housing 40 is tapered to a point 44 at the forward end. The upper surface 42 defines a window 46 through which a magnet 48 is exhibited. The magnet 48 carries a meter mark 50. Displacement of the meter mark 50 from alignment with an index mark 52 indicates a position of the tube T in the proximity of indicator I.

The magnet 48 in the indicator I is in a toroid form (defining a non-magnetic gap 54) and is concentrically supported by a coil spring 56 the center of which is affixed to a lateral post 58 that is anchored in the housing 40. When the indicator I is independent of substantial magnetic fields (or magnetic medium) the gap 54 is held in a quiescent position substantially as indicated in FIG. 7, resulting in the meter mark 50 (FIG. 6) being aligned with the index mark 52.

In using the indicator I, the bottom surface 60 is usually separated from the strip 28 by a section of living tissue 61. However, upon the flux field of the strip 28 encountering the flux field of the magnet 48, the latter is displaced counterclockwise (as indicated by the arrow 63) toward a position in which the strip 28 would close the non-magnetic gap 54. With such displacement, the meter mark 50 (FIG. 6) is moved forward from the index mark 52 indicating that the strip 28 (and accordingly the tube T) has been sensed. It may, therefore, be seen that the indicator I may be variously moved over the subject S (FIG. 1) to follow or indicate the position of a tube T.

As suggested above, the T may take various forms other than with the strip 28 of magnetic substance. In one alternative construction (FIG. 4) the tube may be a clear, somewhat cylindrical elongated body 65 into which a thin wire 66 of magnetic material is embedded. Additionally, a segmental strip 68 of conductive material, e.g., carbon, extends the full length of the tube T. In such a structure, the transparent body 65 affords a view of the interior of the tube. The wire 66 is magnetized as described, along a single polarity orientation for effective sensing. Thus, the desired electrical characteristic for the tube is provided by the strip 68 which extends completely through the tube and along its entire length.

With regard to small tubes, it may be desirable to provide a somewhat-uniform extrusion of plastic containing a dispersion of magnetic material. A form of such a tube is depicted in FIG. 5 and essentially consists of a homogeneous mixture of particle magnetic material in a carrier, as for example, of plastic.

As still another alternative, the tube may be as illustrated in FIG. 2; however, altered by the magnetic strip being in the form of slugs or segments 71 (FIG. 6). Specifically, the segments 71 are spaced apart by a predetermined distance D so as to provide another source of information in the use of a magnetic detector. Of course, the length of the segments 71 is also predetermined.

Of course, other forms of tubes may be employed in accordance with the teachings hereof to accomplish an effective structure for use within living tissue and which may be simply and easily located to define both position and path. Consequently, the scope hereof shall not be determined with limitations relating to the embodiment set forth herein, rather, however, shall be defined by the claims as set forth below.

What is claimed is:

1. An externally detectable tube structure for use within living tissue, as to establish an access passage comprising:

a seamless elongated tube comprising an integral wall of flexible non-fibrous imperforate material for in sertion into living tissue; and

a quantity of ferromagnetic material disposed within said wall along a substantial length of said tube for magnetic detection at an external location in relation to said living tissue, said material being flexible in said tube, to accommodate flexibility of said tube.

2. A tube structure according to claim 1 wherein said ferromagnetic material is magnetized by domains of a dominant sense of magnetism along the entire substantial length thereof and aligned with said elongated tube.

3. A tube structure according to claim I wherein said ferromagnetic material comprises a continuous strip that extends substantially the full length of said tube.

4. A tube structure according to claim 3 wherein said ferromagnetic material is magnetized by domains of a dominant sense of magnetism and wherein said dominant sense of magnetism aligns to the elongate tube.

5. A tube structure according to claim 1 wherein said ferromagnetic material comprises separate spacedapart segments of particulate material defining a strip.

6. A tube structure according to claim 5 wherein said tube material is transparent and said ferromagnetic material is confined to a defined radial segment in the wall of said tube.

7. A tube structure according to claim 1 wherein said distal end.

Claims (9)

1. An externally detectable tube structure for use within living tissue, as to establish an access passage comprising: a seamless elongated tube comprising an integral wall of flexible non-fibrous imperforate material for insertion into living tissue; and a quantity of ferromagnetic material disposed within said wall along a substantial length of said tube for magnetic detection at an external location in relation to said living tissue, said material being flexible in said tube, to accommodate flexibility of said tube.
2. A tube structure according to claim 1 wherein said ferromagnetic material is magnetized by domains of a dominant sense of magnetism along the entire substantial length thereof and aligned with said elongated tube.
3. A tube structure according to claim 1 wherein said ferromagnetic material comprises a continuous strip that extends substantially the full length of said tube.
4. A tube structure according to claim 3 wherein said ferromagnetic material is magnetized by domains of a dominant sense of magnetism and wherein said dominant sense of magnetism aligns to the elongate tube.
5. A tube structure according to claim 1 wherein said ferromagnetic material comprises separate spaced-apart segments of particulate material defining a strip.
6. A tube structure according to claim 5 wherein said tube material is transparent and said ferromagnetic material is confined to a defined radial segment in the wall of said tube.
7. A tube structure according to claim 1 wherein said ferromagnetic material comprises an integral wire extending along the elongated dimension of said tube.
8. A tube structure according to claim 1 wherein said tube material is transparent and further includes an electrically conductive strip extending substantially the full length of said tube and from the interior to the exterior of the wall of said tube.
9. A tube structure according to claim 1 wherein one end of said tube is of reduced cross section to define a distal end.
US00370900A 1973-06-18 1973-06-18 Medico-surgical tube Expired - Lifetime US3847157A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US00370900A US3847157A (en) 1973-06-18 1973-06-18 Medico-surgical tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00370900A US3847157A (en) 1973-06-18 1973-06-18 Medico-surgical tube

Publications (1)

Publication Number Publication Date
US3847157A true US3847157A (en) 1974-11-12

Family

ID=23461643

Family Applications (1)

Application Number Title Priority Date Filing Date
US00370900A Expired - Lifetime US3847157A (en) 1973-06-18 1973-06-18 Medico-surgical tube

Country Status (1)

Country Link
US (1) US3847157A (en)

Cited By (75)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096862A (en) * 1976-05-17 1978-06-27 Deluca Salvatore A Locating of tubes in the human body
US4105732A (en) * 1975-11-21 1978-08-08 Krandex Corp. Radiographic opaque and conductive striped medical tubes
US4162679A (en) * 1976-09-28 1979-07-31 Reenstierna Erik G B Method and device for the implantation of one or more pacemaker electrodes in a heart
US4173228A (en) * 1977-05-16 1979-11-06 Applied Medical Devices Catheter locating device
US4176662A (en) * 1977-06-17 1979-12-04 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Apparatus for endoscopic examination
US4279252A (en) * 1979-08-24 1981-07-21 Martin Michael T X-ray scaling catheter
US4572198A (en) * 1984-06-18 1986-02-25 Varian Associates, Inc. Catheter for use with NMR imaging systems
WO1987003465A1 (en) * 1985-12-09 1987-06-18 Alain Lambert Ingestable module for the functional exploration of the digestive tract
WO1987004080A2 (en) * 1986-01-13 1987-07-16 Donald Bernard Longmore Surgical catheters
EP0320623A1 (en) * 1987-12-14 1989-06-21 Pulsotronic Merten GmbH & Co. KG Device for determining the position of a catheter or a probe inside a living organ
US4943770A (en) * 1987-04-21 1990-07-24 Mccormick Laboratories, Inc. Device for accurately detecting the position of a ferromagnetic material inside biological tissue
US5042486A (en) * 1989-09-29 1991-08-27 Siemens Aktiengesellschaft Catheter locatable with non-ionizing field and method for locating same
US5068886A (en) * 1990-06-28 1991-11-26 Monica Lavia Catheter or cannula position indicator for use in hemodynamic monitoring and the like
US5209749A (en) * 1990-05-11 1993-05-11 Applied Urology Inc. Fluoroscopically alignable cutter assembly and method of using the same
US5209730A (en) * 1989-12-19 1993-05-11 Scimed Life Systems, Inc. Method for placement of a balloon dilatation catheter across a stenosis and apparatus therefor
US5211165A (en) * 1991-09-03 1993-05-18 General Electric Company Tracking system to follow the position and orientation of a device with radiofrequency field gradients
US5251635A (en) * 1991-09-03 1993-10-12 General Electric Company Stereoscopic X-ray fluoroscopy system using radiofrequency fields
US5255680A (en) * 1991-09-03 1993-10-26 General Electric Company Automatic gantry positioning for imaging systems
US5257636A (en) * 1991-04-02 1993-11-02 Steven J. White Apparatus for determining position of an endothracheal tube
US5265610A (en) * 1991-09-03 1993-11-30 General Electric Company Multi-planar X-ray fluoroscopy system using radiofrequency fields
WO1994003110A1 (en) * 1992-07-30 1994-02-17 Rammler David H Catheter track and catheter for diagnosis and treatment
US5377678A (en) * 1991-09-03 1995-01-03 General Electric Company Tracking system to follow the position and orientation of a device with radiofrequency fields
WO1995008130A1 (en) * 1993-09-14 1995-03-23 University Of Washington Apparatus and method for locating a medical tube in the body of a patient
US5431640A (en) * 1994-11-09 1995-07-11 The Medical Center Of Central Georgia Method and apparatus for duodenal intubation of a patient
US5437290A (en) * 1991-09-06 1995-08-01 Board Of Trustees Of The Leland Stanford Jr. University System and method for monitoring intraluminal device position
US5533957A (en) * 1994-05-06 1996-07-09 Trustees Of Boston University Method of tissue retroperfusion
US5558091A (en) * 1993-10-06 1996-09-24 Biosense, Inc. Magnetic determination of position and orientation
US5645065A (en) * 1991-09-04 1997-07-08 Navion Biomedical Corporation Catheter depth, position and orientation location system
WO1997048438A2 (en) * 1996-06-17 1997-12-24 Lucent Medical Systems, Inc. Medical tube for insertion and detection within the body of a patient
WO1997049445A1 (en) * 1996-06-27 1997-12-31 Lucent Medical Systems, Inc. Tracheal tube and methods related thereto
US5830155A (en) * 1995-10-27 1998-11-03 Cordis Corporation Guidewire assembly
US5836892A (en) * 1995-10-30 1998-11-17 Cordis Corporation Guidewire with radiopaque markers
WO1999056813A1 (en) 1998-05-05 1999-11-11 Sabry Gabriel Method and apparatus for intubation of a patient
US6129668A (en) * 1997-05-08 2000-10-10 Lucent Medical Systems, Inc. System and method to determine the location and orientation of an indwelling medical device
US6173715B1 (en) 1999-03-01 2001-01-16 Lucent Medical Systems, Inc. Magnetic anatomical marker and method of use
US6216028B1 (en) 1997-05-08 2001-04-10 Lucent Medical Systems, Inc. Method to determine the location and orientation of an indwelling medical device
US6263230B1 (en) 1997-05-08 2001-07-17 Lucent Medical Systems, Inc. System and method to determine the location and orientation of an indwelling medical device
US6370224B1 (en) 1998-06-29 2002-04-09 Sofamor Danek Group, Inc. System and methods for the reduction and elimination of image artifacts in the calibration of x-ray imagers
US20030055449A1 (en) * 2001-09-19 2003-03-20 Advanced Cardiovascular Systems, Inc. MRI visible catheter balloon
US6725080B2 (en) 2000-03-01 2004-04-20 Surgical Navigation Technologies, Inc. Multiple cannula image guided tool for image guided procedures
US6990368B2 (en) 2002-04-04 2006-01-24 Surgical Navigation Technologies, Inc. Method and apparatus for virtual digital subtraction angiography
US7033325B1 (en) 1989-12-19 2006-04-25 Scimed Life Systems, Inc. Guidewire with multiple radiopaque marker sections
US20070049846A1 (en) * 2005-08-24 2007-03-01 C.R.Bard, Inc. Stylet Apparatuses and Methods of Manufacture
US20090062772A1 (en) * 2007-08-30 2009-03-05 Syncro Medical Innovations, Inc. Guided catheter with removable magnetic guide
US7525309B2 (en) 2005-12-30 2009-04-28 Depuy Products, Inc. Magnetic sensor array
US7561051B1 (en) 2005-04-20 2009-07-14 Creare Inc. Magnet locating apparatus and method of locating a magnet using such apparatus
US20100094116A1 (en) * 2008-10-07 2010-04-15 Lucent Medical Systems, Inc. Percutaneous magnetic gastrostomy
US20100145147A1 (en) * 2008-09-02 2010-06-10 Syncro Medical Innovations, Inc. Magnetic device for guiding catheter and method of use therefor
US20100204569A1 (en) * 2007-11-26 2010-08-12 C. R. Bard, Inc. System for placement of a catheter including a signal-generating stylet
US7794407B2 (en) 2006-10-23 2010-09-14 Bard Access Systems, Inc. Method of locating the tip of a central venous catheter
US20100318026A1 (en) * 2009-06-12 2010-12-16 Romedex International Srl Devices and Methods for Endovascular Electrography
US20100317981A1 (en) * 2009-06-12 2010-12-16 Romedex International Srl Catheter Tip Positioning Method
US20110015533A1 (en) * 2007-11-26 2011-01-20 C.R. Bard, Inc. Stylets for use with apparatus for intravascular placement of a catheter
US20110196248A1 (en) * 2009-06-12 2011-08-11 Bard Access Systems, Inc. Apparatus and method for catheter navigation and tip location
US8068648B2 (en) 2006-12-21 2011-11-29 Depuy Products, Inc. Method and system for registering a bone of a patient with a computer assisted orthopaedic surgery system
US8388541B2 (en) 2007-11-26 2013-03-05 C. R. Bard, Inc. Integrated system for intravascular placement of a catheter
US8388546B2 (en) 2006-10-23 2013-03-05 Bard Access Systems, Inc. Method of locating the tip of a central venous catheter
US8478382B2 (en) 2008-02-11 2013-07-02 C. R. Bard, Inc. Systems and methods for positioning a catheter
USD699359S1 (en) 2011-08-09 2014-02-11 C. R. Bard, Inc. Ultrasound probe head
US8801693B2 (en) 2010-10-29 2014-08-12 C. R. Bard, Inc. Bioimpedance-assisted placement of a medical device
US8849382B2 (en) 2007-11-26 2014-09-30 C. R. Bard, Inc. Apparatus and display methods relating to intravascular placement of a catheter
US8862200B2 (en) 2005-12-30 2014-10-14 DePuy Synthes Products, LLC Method for determining a position of a magnetic source
USD724745S1 (en) 2011-08-09 2015-03-17 C. R. Bard, Inc. Cap for an ultrasound probe
US9211107B2 (en) 2011-11-07 2015-12-15 C. R. Bard, Inc. Ruggedized ultrasound hydrogel insert
US9456766B2 (en) 2007-11-26 2016-10-04 C. R. Bard, Inc. Apparatus for use with needle insertion guidance system
US9492097B2 (en) 2007-11-26 2016-11-15 C. R. Bard, Inc. Needle length determination and calibration for insertion guidance system
US9521961B2 (en) 2007-11-26 2016-12-20 C. R. Bard, Inc. Systems and methods for guiding a medical instrument
US9532724B2 (en) 2009-06-12 2017-01-03 Bard Access Systems, Inc. Apparatus and method for catheter navigation using endovascular energy mapping
US9554716B2 (en) 2007-11-26 2017-01-31 C. R. Bard, Inc. Insertion guidance system for needles and medical components
US9649048B2 (en) 2007-11-26 2017-05-16 C. R. Bard, Inc. Systems and methods for breaching a sterile field for intravascular placement of a catheter
US9839372B2 (en) 2014-02-06 2017-12-12 C. R. Bard, Inc. Systems and methods for guidance and placement of an intravascular device
US9901714B2 (en) 2008-08-22 2018-02-27 C. R. Bard, Inc. Catheter assembly including ECG sensor and magnetic assemblies
US10039920B1 (en) 2017-08-02 2018-08-07 Lungpacer Medical, Inc. Systems and methods for intravascular catheter positioning and/or nerve stimulation
US10046139B2 (en) 2010-08-20 2018-08-14 C. R. Bard, Inc. Reconfirmation of ECG-assisted catheter tip placement
US10271762B2 (en) 2016-11-30 2019-04-30 Bard Access Systems, Inc. Apparatus and method for catheter navigation using endovascular energy mapping

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2857915A (en) * 1956-04-02 1958-10-28 David S Sheridan X-ray catheter
US3043309A (en) * 1959-09-29 1962-07-10 Avco Corp Method of performing intestinal intubation
US3070132A (en) * 1960-04-06 1962-12-25 David S Sheridan Non-sparking medico-surgical tubes
US3358676A (en) * 1962-11-30 1967-12-19 Yeda Res & Dev Magnetic propulsion of diagnostic or therapeutic elements through the body ducts of animal or human patients
US3674014A (en) * 1969-10-28 1972-07-04 Astra Meditec Ab Magnetically guidable catheter-tip and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2857915A (en) * 1956-04-02 1958-10-28 David S Sheridan X-ray catheter
US3043309A (en) * 1959-09-29 1962-07-10 Avco Corp Method of performing intestinal intubation
US3070132A (en) * 1960-04-06 1962-12-25 David S Sheridan Non-sparking medico-surgical tubes
US3358676A (en) * 1962-11-30 1967-12-19 Yeda Res & Dev Magnetic propulsion of diagnostic or therapeutic elements through the body ducts of animal or human patients
US3674014A (en) * 1969-10-28 1972-07-04 Astra Meditec Ab Magnetically guidable catheter-tip and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RCA Tech. Notes, June 1966, RCA TN No. 675, Morey *

Cited By (121)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105732A (en) * 1975-11-21 1978-08-08 Krandex Corp. Radiographic opaque and conductive striped medical tubes
US4096862A (en) * 1976-05-17 1978-06-27 Deluca Salvatore A Locating of tubes in the human body
US4162679A (en) * 1976-09-28 1979-07-31 Reenstierna Erik G B Method and device for the implantation of one or more pacemaker electrodes in a heart
US4173228A (en) * 1977-05-16 1979-11-06 Applied Medical Devices Catheter locating device
US4176662A (en) * 1977-06-17 1979-12-04 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Apparatus for endoscopic examination
US4279252A (en) * 1979-08-24 1981-07-21 Martin Michael T X-ray scaling catheter
US4572198A (en) * 1984-06-18 1986-02-25 Varian Associates, Inc. Catheter for use with NMR imaging systems
WO1987003465A1 (en) * 1985-12-09 1987-06-18 Alain Lambert Ingestable module for the functional exploration of the digestive tract
US4827931A (en) * 1986-01-13 1989-05-09 Longmore Donald B Surgical catheters with suturing device and NMR opaque material
WO1987004080A3 (en) * 1986-01-13 1987-08-13 Donald Bernard Longmore Surgical catheters
WO1987004080A2 (en) * 1986-01-13 1987-07-16 Donald Bernard Longmore Surgical catheters
US4943770A (en) * 1987-04-21 1990-07-24 Mccormick Laboratories, Inc. Device for accurately detecting the position of a ferromagnetic material inside biological tissue
EP0320623A1 (en) * 1987-12-14 1989-06-21 Pulsotronic Merten GmbH & Co. KG Device for determining the position of a catheter or a probe inside a living organ
US5042486A (en) * 1989-09-29 1991-08-27 Siemens Aktiengesellschaft Catheter locatable with non-ionizing field and method for locating same
US6179788B1 (en) 1989-12-19 2001-01-30 Scimed Life Systems, Inc. Guide wire with multiple radiopaque sections and method of use
US5209730A (en) * 1989-12-19 1993-05-11 Scimed Life Systems, Inc. Method for placement of a balloon dilatation catheter across a stenosis and apparatus therefor
US7033325B1 (en) 1989-12-19 2006-04-25 Scimed Life Systems, Inc. Guidewire with multiple radiopaque marker sections
US5209749A (en) * 1990-05-11 1993-05-11 Applied Urology Inc. Fluoroscopically alignable cutter assembly and method of using the same
US5068886A (en) * 1990-06-28 1991-11-26 Monica Lavia Catheter or cannula position indicator for use in hemodynamic monitoring and the like
US5257636A (en) * 1991-04-02 1993-11-02 Steven J. White Apparatus for determining position of an endothracheal tube
US5251635A (en) * 1991-09-03 1993-10-12 General Electric Company Stereoscopic X-ray fluoroscopy system using radiofrequency fields
US5255680A (en) * 1991-09-03 1993-10-26 General Electric Company Automatic gantry positioning for imaging systems
US5265610A (en) * 1991-09-03 1993-11-30 General Electric Company Multi-planar X-ray fluoroscopy system using radiofrequency fields
US5377678A (en) * 1991-09-03 1995-01-03 General Electric Company Tracking system to follow the position and orientation of a device with radiofrequency fields
US5211165A (en) * 1991-09-03 1993-05-18 General Electric Company Tracking system to follow the position and orientation of a device with radiofrequency field gradients
US5645065A (en) * 1991-09-04 1997-07-08 Navion Biomedical Corporation Catheter depth, position and orientation location system
US5437290A (en) * 1991-09-06 1995-08-01 Board Of Trustees Of The Leland Stanford Jr. University System and method for monitoring intraluminal device position
WO1994003110A1 (en) * 1992-07-30 1994-02-17 Rammler David H Catheter track and catheter for diagnosis and treatment
AU689136B2 (en) * 1993-09-14 1998-03-26 University Of Washington Apparatus and method for locating a medical tube in the body of a patient
WO1995008130A1 (en) * 1993-09-14 1995-03-23 University Of Washington Apparatus and method for locating a medical tube in the body of a patient
AU716011B2 (en) * 1993-09-14 2000-02-17 University Of Washington A medical tube enabling detection of a location thereof in the body of a patient
US5558091A (en) * 1993-10-06 1996-09-24 Biosense, Inc. Magnetic determination of position and orientation
US6427314B1 (en) 1993-10-06 2002-08-06 Biosense, Inc. Magnetic determination of position and orientation
US5833608A (en) * 1993-10-06 1998-11-10 Biosense, Inc. Magnetic determination of position and orientation
US5597377A (en) * 1994-05-06 1997-01-28 Trustees Of Boston University Coronary sinus reperfusion catheter
US5533957A (en) * 1994-05-06 1996-07-09 Trustees Of Boston University Method of tissue retroperfusion
US5431640A (en) * 1994-11-09 1995-07-11 The Medical Center Of Central Georgia Method and apparatus for duodenal intubation of a patient
US5830155A (en) * 1995-10-27 1998-11-03 Cordis Corporation Guidewire assembly
US5836892A (en) * 1995-10-30 1998-11-17 Cordis Corporation Guidewire with radiopaque markers
US20030040671A1 (en) * 1996-06-17 2003-02-27 Somogyi Christopher P. Medical tube for insertion and detection within the body of a patient
WO1997048438A3 (en) * 1996-06-17 1998-03-19 Robert N Golden Medical tube for insertion and detection within the body of a patient
WO1997048438A2 (en) * 1996-06-17 1997-12-24 Lucent Medical Systems, Inc. Medical tube for insertion and detection within the body of a patient
WO1997049445A1 (en) * 1996-06-27 1997-12-31 Lucent Medical Systems, Inc. Tracheal tube and methods related thereto
US6263230B1 (en) 1997-05-08 2001-07-17 Lucent Medical Systems, Inc. System and method to determine the location and orientation of an indwelling medical device
US6216028B1 (en) 1997-05-08 2001-04-10 Lucent Medical Systems, Inc. Method to determine the location and orientation of an indwelling medical device
US6129668A (en) * 1997-05-08 2000-10-10 Lucent Medical Systems, Inc. System and method to determine the location and orientation of an indwelling medical device
WO1999056813A1 (en) 1998-05-05 1999-11-11 Sabry Gabriel Method and apparatus for intubation of a patient
US6370224B1 (en) 1998-06-29 2002-04-09 Sofamor Danek Group, Inc. System and methods for the reduction and elimination of image artifacts in the calibration of x-ray imagers
US6173715B1 (en) 1999-03-01 2001-01-16 Lucent Medical Systems, Inc. Magnetic anatomical marker and method of use
US6725080B2 (en) 2000-03-01 2004-04-20 Surgical Navigation Technologies, Inc. Multiple cannula image guided tool for image guided procedures
US7881770B2 (en) 2000-03-01 2011-02-01 Medtronic Navigation, Inc. Multiple cannula image guided tool for image guided procedures
US20080021495A1 (en) * 2001-09-19 2008-01-24 Advanced Cardiovascular Systems, Inc. Mri visible catheter balloon
US6911017B2 (en) 2001-09-19 2005-06-28 Advanced Cardiovascular Systems, Inc. MRI visible catheter balloon
US20030055449A1 (en) * 2001-09-19 2003-03-20 Advanced Cardiovascular Systems, Inc. MRI visible catheter balloon
US20050215885A1 (en) * 2001-09-19 2005-09-29 Lee Jeong S MRI visible catheter balloon
US8838199B2 (en) 2002-04-04 2014-09-16 Medtronic Navigation, Inc. Method and apparatus for virtual digital subtraction angiography
US6990368B2 (en) 2002-04-04 2006-01-24 Surgical Navigation Technologies, Inc. Method and apparatus for virtual digital subtraction angiography
US7561051B1 (en) 2005-04-20 2009-07-14 Creare Inc. Magnet locating apparatus and method of locating a magnet using such apparatus
US8784336B2 (en) 2005-08-24 2014-07-22 C. R. Bard, Inc. Stylet apparatuses and methods of manufacture
US20070049846A1 (en) * 2005-08-24 2007-03-01 C.R.Bard, Inc. Stylet Apparatuses and Methods of Manufacture
US10004875B2 (en) 2005-08-24 2018-06-26 C. R. Bard, Inc. Stylet apparatuses and methods of manufacture
US20090189603A1 (en) * 2005-12-30 2009-07-30 Sherman Jason T Magnetic sensor array
US8862200B2 (en) 2005-12-30 2014-10-14 DePuy Synthes Products, LLC Method for determining a position of a magnetic source
US7525309B2 (en) 2005-12-30 2009-04-28 Depuy Products, Inc. Magnetic sensor array
US8148978B2 (en) 2005-12-30 2012-04-03 Depuy Products, Inc. Magnetic sensor array
US8512256B2 (en) 2006-10-23 2013-08-20 Bard Access Systems, Inc. Method of locating the tip of a central venous catheter
US20100331712A1 (en) * 2006-10-23 2010-12-30 Bard Access Systems, Inc. Method of locating the tip of a central venous catheter
US8388546B2 (en) 2006-10-23 2013-03-05 Bard Access Systems, Inc. Method of locating the tip of a central venous catheter
US7794407B2 (en) 2006-10-23 2010-09-14 Bard Access Systems, Inc. Method of locating the tip of a central venous catheter
US9345422B2 (en) 2006-10-23 2016-05-24 Bard Acess Systems, Inc. Method of locating the tip of a central venous catheter
US8858455B2 (en) 2006-10-23 2014-10-14 Bard Access Systems, Inc. Method of locating the tip of a central venous catheter
US9265443B2 (en) 2006-10-23 2016-02-23 Bard Access Systems, Inc. Method of locating the tip of a central venous catheter
US8774907B2 (en) 2006-10-23 2014-07-08 Bard Access Systems, Inc. Method of locating the tip of a central venous catheter
US9833169B2 (en) 2006-10-23 2017-12-05 Bard Access Systems, Inc. Method of locating the tip of a central venous catheter
US8068648B2 (en) 2006-12-21 2011-11-29 Depuy Products, Inc. Method and system for registering a bone of a patient with a computer assisted orthopaedic surgery system
US20090062772A1 (en) * 2007-08-30 2009-03-05 Syncro Medical Innovations, Inc. Guided catheter with removable magnetic guide
US8781555B2 (en) 2007-11-26 2014-07-15 C. R. Bard, Inc. System for placement of a catheter including a signal-generating stylet
US9999371B2 (en) 2007-11-26 2018-06-19 C. R. Bard, Inc. Integrated system for intravascular placement of a catheter
US20100204569A1 (en) * 2007-11-26 2010-08-12 C. R. Bard, Inc. System for placement of a catheter including a signal-generating stylet
US8388541B2 (en) 2007-11-26 2013-03-05 C. R. Bard, Inc. Integrated system for intravascular placement of a catheter
US9649048B2 (en) 2007-11-26 2017-05-16 C. R. Bard, Inc. Systems and methods for breaching a sterile field for intravascular placement of a catheter
US10165962B2 (en) 2007-11-26 2019-01-01 C. R. Bard, Inc. Integrated systems for intravascular placement of a catheter
US10238418B2 (en) 2007-11-26 2019-03-26 C. R. Bard, Inc. Apparatus for use with needle insertion guidance system
US8849382B2 (en) 2007-11-26 2014-09-30 C. R. Bard, Inc. Apparatus and display methods relating to intravascular placement of a catheter
US9492097B2 (en) 2007-11-26 2016-11-15 C. R. Bard, Inc. Needle length determination and calibration for insertion guidance system
US10105121B2 (en) 2007-11-26 2018-10-23 C. R. Bard, Inc. System for placement of a catheter including a signal-generating stylet
US20110015533A1 (en) * 2007-11-26 2011-01-20 C.R. Bard, Inc. Stylets for use with apparatus for intravascular placement of a catheter
US9636031B2 (en) 2007-11-26 2017-05-02 C.R. Bard, Inc. Stylets for use with apparatus for intravascular placement of a catheter
US9554716B2 (en) 2007-11-26 2017-01-31 C. R. Bard, Inc. Insertion guidance system for needles and medical components
US9549685B2 (en) 2007-11-26 2017-01-24 C. R. Bard, Inc. Apparatus and display methods relating to intravascular placement of a catheter
US9526440B2 (en) 2007-11-26 2016-12-27 C.R. Bard, Inc. System for placement of a catheter including a signal-generating stylet
US9521961B2 (en) 2007-11-26 2016-12-20 C. R. Bard, Inc. Systems and methods for guiding a medical instrument
US10231753B2 (en) 2007-11-26 2019-03-19 C. R. Bard, Inc. Insertion guidance system for needles and medical components
US9681823B2 (en) 2007-11-26 2017-06-20 C. R. Bard, Inc. Integrated system for intravascular placement of a catheter
US9456766B2 (en) 2007-11-26 2016-10-04 C. R. Bard, Inc. Apparatus for use with needle insertion guidance system
US8971994B2 (en) 2008-02-11 2015-03-03 C. R. Bard, Inc. Systems and methods for positioning a catheter
US8478382B2 (en) 2008-02-11 2013-07-02 C. R. Bard, Inc. Systems and methods for positioning a catheter
US9901714B2 (en) 2008-08-22 2018-02-27 C. R. Bard, Inc. Catheter assembly including ECG sensor and magnetic assemblies
US20100145147A1 (en) * 2008-09-02 2010-06-10 Syncro Medical Innovations, Inc. Magnetic device for guiding catheter and method of use therefor
US9907513B2 (en) 2008-10-07 2018-03-06 Bard Access Systems, Inc. Percutaneous magnetic gastrostomy
US8437833B2 (en) 2008-10-07 2013-05-07 Bard Access Systems, Inc. Percutaneous magnetic gastrostomy
US20100094116A1 (en) * 2008-10-07 2010-04-15 Lucent Medical Systems, Inc. Percutaneous magnetic gastrostomy
US9532724B2 (en) 2009-06-12 2017-01-03 Bard Access Systems, Inc. Apparatus and method for catheter navigation using endovascular energy mapping
US20100318026A1 (en) * 2009-06-12 2010-12-16 Romedex International Srl Devices and Methods for Endovascular Electrography
US9339206B2 (en) 2009-06-12 2016-05-17 Bard Access Systems, Inc. Adaptor for endovascular electrocardiography
US20100317981A1 (en) * 2009-06-12 2010-12-16 Romedex International Srl Catheter Tip Positioning Method
US20110196248A1 (en) * 2009-06-12 2011-08-11 Bard Access Systems, Inc. Apparatus and method for catheter navigation and tip location
US10231643B2 (en) 2009-06-12 2019-03-19 Bard Access Systems, Inc. Apparatus and method for catheter navigation and tip location
US9125578B2 (en) 2009-06-12 2015-09-08 Bard Access Systems, Inc. Apparatus and method for catheter navigation and tip location
US9445734B2 (en) 2009-06-12 2016-09-20 Bard Access Systems, Inc. Devices and methods for endovascular electrography
US10046139B2 (en) 2010-08-20 2018-08-14 C. R. Bard, Inc. Reconfirmation of ECG-assisted catheter tip placement
US9415188B2 (en) 2010-10-29 2016-08-16 C. R. Bard, Inc. Bioimpedance-assisted placement of a medical device
US8801693B2 (en) 2010-10-29 2014-08-12 C. R. Bard, Inc. Bioimpedance-assisted placement of a medical device
USD724745S1 (en) 2011-08-09 2015-03-17 C. R. Bard, Inc. Cap for an ultrasound probe
USD699359S1 (en) 2011-08-09 2014-02-11 C. R. Bard, Inc. Ultrasound probe head
USD754357S1 (en) 2011-08-09 2016-04-19 C. R. Bard, Inc. Ultrasound probe head
US9211107B2 (en) 2011-11-07 2015-12-15 C. R. Bard, Inc. Ruggedized ultrasound hydrogel insert
US9839372B2 (en) 2014-02-06 2017-12-12 C. R. Bard, Inc. Systems and methods for guidance and placement of an intravascular device
US10271762B2 (en) 2016-11-30 2019-04-30 Bard Access Systems, Inc. Apparatus and method for catheter navigation using endovascular energy mapping
US10195429B1 (en) 2017-08-02 2019-02-05 Lungpacer Medical Inc. Systems and methods for intravascular catheter positioning and/or nerve stimulation
US10039920B1 (en) 2017-08-02 2018-08-07 Lungpacer Medical, Inc. Systems and methods for intravascular catheter positioning and/or nerve stimulation

Similar Documents

Publication Publication Date Title
Deutsch et al. The determination of paramagnetic susceptibility by NMR: A physical chemistry experiment
Tuttle et al. Detection of gastro-esophageal reflux by simultaneous measurement of intraluminal pressure and pH
Field et al. Lymphocyte sensitisation: an in-vitro test for cancer?
US4195515A (en) In line electromagnetic flow measurement transducer
Hoffer Status of gallium-67 in tumor detector
US20030195453A1 (en) Access disconnection systems and methods
US3946726A (en) Pulmonary diagnostic instrument including breath transducer
US3524058A (en) Respiration monitor having means for triggering a utilization device
Robinson Localization of intracerebral electrodes
US5329932A (en) Methods of and apparatus for monitoring respiration and conductive composition used therewith
US3592185A (en) Ferromagnetic contrast media and method of use
CA2362916C (en) Magnetic anatomical marker and method of use
EP2210552A1 (en) Apparatus for tracking insertion depth
Burl et al. Tuned fiducial markers to identify body locations with minimal perturbation of tissue magnetization
US3449662A (en) Magnetic inspection method and apparatus using resilient magnetizing means and resilient sensors
Cohen et al. Smoking impairs long-term dust clearance from the lung
EP0092438A2 (en) Method and apparatus for measuring cardiac output
US4308872A (en) Method and apparatus for monitoring respiration
US4914381A (en) Direct-coupled fluxgate current sensor
Watson et al. Telemetering from within the body using a pressure-sensitive radio pill
US5325728A (en) Electromagnetic flow meter
WO1994002079A1 (en) Tube placement verifier system
US5125406A (en) Electrode endotracheal tube
US3605741A (en) Intravenous flow control system
US7320319B2 (en) Medicant delivery system and method