Transtracheal energy application and sensing system for intubation: method and apparatus

• US 5,560,351 A
• Filed: 10/07/1994
• Issued: 10/01/1996
• Est. Priority Date: 10/07/1994
• Status: Expired due to Fees

• Current Assignee: University of Florida (State University System of Florida)
• Original Assignee: University of Florida (State University System of Florida)
• Inventors: Melker, Richard J., Gravenstein, Nikolaus, Sultan, Anwer, Lampotang, Samsun, Gravenstein, Dietrich
• Primary Examiner(s): Lewis, Aaron J.
• Application Number:
  US08/319,543
• Time in Patent Office: 725 Days
• Field of Search: 128/200.26, 128/205.23, 128/207.14, 128/207.15
• US Class Current: 128/200.26
• CPC Class Codes: A61B 1/00097 Sensors
• CPC Class Codes: A61B 5/0059 using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• CPC Class Codes: A61B 5/061 Determining 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 A61B1/00158 takes precedence
• CPC Class Codes: A61M 16/0488 Mouthpieces; Means for guiding, securing or introducing the tubes guiding or introducing with laryngoscopes A61B1/267; holding devices on the body A61M25/02

Abstract

An intubation scope assembly adapted to facilitate the positioning of an endotracheal tube in a patient comprising an electromagnetic or sound energy source which enters the vocal cords exteriorly of the neck of the patient with energy having a direction, wavelength and intensity capable of entering the trachea, substantially avoiding encompassing the entire pharynx and capable of being transmitted cephalad substantially between and/or around the vocal cords. A suitable sensor for the energy emitted by such source comprises a stylet assembly, the distal end of which can detect or collect the energy transmitted between and/or around the vocal cords and the proximal end of which can monitor the detected or collected energy to thereby locate the vocal cords for positioning an endotracheal tube therebetween. A system and method of intubating a patient with the foregoing assembly are also disclosed.

Claims

1. An intubation scope assembly adapted to facilitate the positioning of an endotracheal tube in the trachea of a patient, comprising:

an electromagnetic or sound energy source, and

a sensor for the electromagnetic or sound energy emitted by said source;

said electromagnetic or sound energy source comprising means for directing said energy between and/or around a patient'"'"'s vocal cords from the exterior of a neck of a patient, the electromagnetic or sound energy having a direction, wavelength and intensity to reach a patient'"'"'s trachea, substantially avoid encompassing a patient'"'"'s entire pharynx and capable of being transmitted cephalad substantially between and/or around a patient'"'"'s vocal cords;

said energy sensor comprising a stylet assembly having proximal and distal ends selected from the group consisting of;

(a) a stylet assembly, the distal end of which comprises means to detect said energy transmitted between and/or around a patient'"'"'s vocal cords, means to transmit said detected energy to the proximal end thereof and the proximal end of which comprises means for monitoring said detected energy to thereby locate a patient'"'"'s vocal cords for positioning therethrough an endotracheal tube, and

(b) a stylet assembly, the distal end of which comprises means to collect said energy transmitted between and/or around a patient'"'"'s vocal cords, means to transmit said collected energy to the proximal end thereof and the proximal end of which comprises means to detect and monitor said collected energy.

2. The intubation scope assembly of claim 1 wherein said energy source contains means for affixing said electromagnetic or sound energy source to the anterior neck.

3. The intubation scope assembly of claim 1 wherein said electromagnetic or sound energy source is light.

4. The intubation scope assembly of claim 1 wherein said electromagnetic or sound energy source comprises at least one light emitting diode.

5. The intubation scope assembly of claim 1 wherein said electromagnetic or sound energy source comprises at least one IR-filtered broad band white light source.

6. The intubation scope assembly of claim 1 wherein the wavelength of said electromagnetic or sound energy is such that it is rapidly absorbed or scattered by soft tissue and water, thereby substantially avoiding encompassing the entire pharynx.

7. The intubation scope assembly of claim 1 wherein said stylet is stylet assembly, the distal end of which comprises means to convert said detected energy into electric signals and the proximal end of which comprises means to process said electric signals into visible or audible cues to enable positioning of an endotracheal tube.

8. The intubation scope assembly of claim 1 wherein the means on said distal end of said stylet assembly for detecting said energy is at least one photodetector.

9. The intubation scope assembly of claim 1 wherein said distal end of said stylet assembly includes means for detecting said energy comprises plural energy sensors.

10. The intubation scope assembly of claim 9 wherein said plural energy sensors are mounted on said distal end of said stylet assembly so as to enable determination of the direction of transmittal of said energy through said vocal cords.

11. The intubation scope assembly of claim 10 wherein said proximal end of said stylet assembly contains means for monitoring said plural energy sensors so as to enable determination of the direction of transmittal of said energy between and/or around and thereby to locate the vocal cords.

12. The intubation scope assembly of claim 1 wherein said distal end of said stylet assembly for collecting said electromagnetic or sound energy comprises means for enhancing collection and transmittance of said electromagnetic or sound energy.

13. The intubation scope assembly of claim 12 wherein said means for enhancing collection and transmittance of said electromagnetic or sound energy is at least one lens.

14. The intubation scope assembly of claim 1 wherein said stylet is stylet assembly, the proximal end of which comprises means to detect said collected and transmitted energy and to convert said detected electromagnetic or sound energy into electric signals and means to process said electric signals into visible or audible cues to enable positioning of an endotracheal tube.

15. An endotracheal tube adapted for the intubation of a patient mounted around the intubation scope assembly of claim 1.

16. An endotracheal tube adapted for the intubation of a patient wherein at least a portion of the intubation scope assembly of claim 1 is contained within a wall of the endotracheal tube.