Apparatus for induction of inhaled pharmacological agent by a pediatric patient

• US 5,937,852 A
• Filed: 09/29/1997
• Issued: 08/17/1999
• Est. Priority Date: 04/08/1997
• Status: Expired due to Term

• Current Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Original Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Inventors: Butler, Bruce D., Warters, R. David
• Primary Examiner(s): Weiss, John G.
• Assistant Examiner(s): ANDERSON, CHARLES WENDELL
• Application Number:
  US08/939,486
• Time in Patent Office: 687 Days
• Field of Search: 128/203.12, 128/200.23, 128/203.28, 128/203.14, 128/205.13, 128/205.11, 128/204.23, 128/204.29, 128/200.16, 128/202.22, 128/205.2 3, 434/264, 600/538, 600/539, 600/533
• US Class Current: 128/203.12
• CPC Class Codes: A61M 15/00 Inhalators drug delivery in endotracheal tubes A61M16/04
• CPC Class Codes: A61M 15/0015 located upstream of the dispenser, i.e. not traversed by the product
• CPC Class Codes: A61M 15/009 using medicine packages with incorporated spraying means, e.g. aerosol cans pocket atomiser of the injector type A61M11/08
• CPC Class Codes: A61M 16/01 specially adapted for anaesthetising A61M16/104, A61M16/18 take precedence
• CPC Class Codes: A61M 16/06 Respiratory or anaesthetic masks
• CPC Class Codes: A61M 16/0683 Holding devices therefor
• CPC Class Codes: A61M 16/0816 Joints or connectors
• CPC Class Codes: A61M 16/0833 T- or Y-type connectors, e.g. Y-piece
• CPC Class Codes: A61M 2016/103 the CO2 concentration
• CPC Class Codes: A61M 2021/0044 by the sight sense
• CPC Class Codes: A61M 21/00 Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
• CPC Class Codes: A61M 2202/0007 introduced into the body
• CPC Class Codes: A61M 2202/0241 Anaesthetics; Analgesics
• CPC Class Codes: A61M 2205/0227 Materials having sensing or indicating function, e.g. indicating a pressure increase
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/584 having a color code
• CPC Class Codes: A61M 2205/587 Lighting arrangements
• CPC Class Codes: A61M 2205/59 Aesthetic features, e.g. distraction means to prevent fears of child patients
• CPC Class Codes: A61M 2206/14 Static flow deviators in tubes disturbing laminar flow in tubes, e.g. archimedes screws
• CPC Class Codes: A61M 2230/432 partial CO2 pressure (P-CO2)

Abstract

This invention relates to an apparatus for inducing a pediatric patient to inhale a fluid pharmacological agent through a face mask. The apparatus comprises a fluid conduit through which fluid pharmacological agent may be inhaled, and a visual patient stimulator coupled to said conduit and accuatable by inspiratory or expiratory flow through said conduit. The visual stimulator of the present invention changes color in response to changing gas levels which occur during inspiration and expiration.

Claims

1. An apparatus for inducing a pediatric patient to inhale a fluid pharmacological agent through a face mask, comprising:

a. a fluid conduit having a first end and a second end and no ports in communication with the ambient environment, said first end capable of being coupled to a source of fluid pharmacological agent and said second end capable of being coupled to a face mask sized to fit a pediatric patient such that fluid pharmacological agent flowing through said conduit can enter a face mask, said conduit having sufficient diameter to allow fluid pharmacological agent to flow through said conduit at a sufficient flow rate to be inhaled by a pediatric patient; and

b. a visual patient stimulator coupled to said conduit such that the inspiratory or expiratory flow of a patients breath through said conduit causes said stimulator to change color, said stimulator being positioned such that its color change is visible to a pediatric patient breathing through a face mask connected to said second end of said conduit.

2. The apparatus of claim 1, wherein said visual stimulator comprises:

a. a colorimetric member that changes color in response to chemical colorimetric changes; and

b. a transparent housing surrounding said colorimetric member.

3. The apparatus of claim 2, wherein said colorimetric member is disc shaped.

4. The apparatus of claim 2 further comprising at least one baffle positioned in said conduit so as to deflect a portion of inspiratory or expiratory fluid flow through said conduit toward said colorimetric member.

5. The apparatus of claim 1, wherein said visual stimulator comprises a colorimetric carbon dioxide indicator.

6. The apparatus of claim 1 wherein said visual stimulator comprises a light indicator which is illuminated in response to inspiratory or expiratory flow of a patient'"'"'s breath sufficient to produce a predetermined level of carbon dioxide in said conduit.

7. An apparatus for inducing a pediatric patient to inhale a fluid pharmacological agent through a face mask, comprising:

a. a fluid conduit having a first end and a second end, said first end capable of being coupled to a source of fluid pharmacological agent and said second end capable of being coupled to a face mask sized to fit a pediatric patient such that fluid pharmacological agent flowing through said conduit can enter a face mask, said conduit having sufficient diameter to allow fluid pharmacological agent to flow through said conduit at a sufficient flow rate to be inhaled by a pediatric patient;

b. a visual patient stimulator coupled to said conduit such that the inspiratory or expiratory flow of a patients breath through said conduit causes said stimulator to change color, said stimulator being positioned such that its color change is visible to a pediatric patent breathing through a face mask connected to said second end of said conduit; and

c. a fluid injection port positioned in said fluid conduit.

8. The apparatus of claim 7 further comprising at least one baffle positioned in said conduit so as to deflect a portion of inspiratory or expiratory fluid flow through said conduit toward said colorimetric member.

9. The apparatus of claim 7 further comprising a flow diverter positioned in said fluid conduit such that the fluid injected in said fluid injection port is directed towards said second end of said fluid conduit.

10. The apparatus of claim 7 wherein said visual stimulator comprises a colorimetric carbon dioxide indicator.

11. The apparatus of claim 7, wherein said visual stimulator comprises

a light indicator which is illuminated in response to inspiratory or expiratory flow of a patient'"'"'s breath sufficient to produce a predetermined level of carbon dioxide in said conduit.

12. The devise of claim 11 wherein said light indicator comprises at least two lights.

13. An apparatus for inducing a pediatric patient to inhale a fluid pharmacological agent through a face mask, comprising:

a. a fluid conduit having a first end and a second end, said first end capable of being coupled to a source of fluid pharmacological agent and said second end capable of being coupled to a face mask sized to fit a pediatric patient such that fluid pharmacological agent flowing through said conduit can enter a face mask, said conduit having sufficient diameter to allow fluid pharmacological agent to flow through said conduit at a sufficient flow rate to be inhaled by a pediatric patient;

b. a visual patient stimulator coupled to said conduit such that the inspiratory or expiratory flow of a patient'"'"'s breath through said conduit causes said stimulator to change color, said stimulator being positioned such that its color change is visible to a pediatric patient breathing through a face mask connected to said second end of said conduit; and

c. a baffle positioned in said conduit so as to deflect a portion of inspiratory or expiratory fluid flow through said conduit toward said visual stimulator.

14. The apparatus of claim 13, wherein said visual stimulator comprises:

a. a colorimetric member that changes color in response to chemical colorimetric changes; and

b. a transparent housing surrounding said colorimetric member.

15. The apparatus of claim 14, wherein said colorimetric member is disc shaped.

16. The apparatus of claim 14 wherein said visual stimulator comprises a light indicator which is illuminated in response to inspiratory or expiratory flow of a patient'"'"'s breath sufficient to produce a predetermined level of carbon dioxide in said conduit.

17. The apparatus of claim 14, wherein said visual stimulator comprises:

a. a carbon dioxide detector placed in said conduit.

b. a transducer coupled to said detector such that when said detector detects a predetermined level of carbon dioxide, each transducer emits an illumination signal; and

c. a light indicator coupled to said transducer such that said light source is illuminated in response to an illumination signal from said transducer.

18. The apparatus of claim 17, wherein said carbon dioxide detector is a disc shaped colorimetric member.