Flexible low deadspace respiratory nosepiece for gas sampling cannulae and method of manufac

Patent metadata

Field	Value
Publication number	US-10471228-B2
Application number	US-201515118644-A
Country	US
Kind code	B2
Filing date	Feb 12, 2015
Priority date	Feb 12, 2014
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

A respiratory nosepiece ( 10 ) and method of manufacturing the respiratory nosepiece, the respiratory nosepiece including a first nasal prong ( 110 ) with a first channel ( 112 ) extending there through, and a first side port ( 130 ) connectable to tubes ( 192, 194 ) having different first and second diameters. The first side port has a second channel ( 131 ) extending there through and in communication with the first channel. The second channel includes a first section ( 134 ) having the first diameter, a second section ( 136 ) having the second diameter, a first step ( 135 ) between the first and second sections, and a second step ( 137 ) between the second section and an end ( 133 ) of the second channel. The first and second channels are formed during injection molding by pins ( 412, 422, 431, 441 ) having flat pin-on-pin geometry to reduce resin flash within the channels.

First claim

The invention claimed is:

1. A respiratory nosepiece comprising:
a first nasal prong configured to be insertable into a nostril of a patient, a first channel extending through the first nasal prong along a first direction; and
a first side port connectable to tubes having different first and second diameters, the first side port including a second channel extending along a second direction orthogonal with respect to the first direction, the second channel having a first end configured to insertably receive the tubes and having a second end in communication with the first channel,
the second channel comprising a first section at the first end having the first diameter, a second section having the second diameter, a first step between the first and second sections, and a second step between the second section and the second end of the second channel, the first step configured to prevent insertion of first tubes having the first diameter into the second section and the second step configured to prevent insertion of second tubes having the second diameter further into the second channel, and
the second step consists of a wall portion located only along an upper inner circumference of the second channel.

2. The respiratory nosepiece of claim 1 , further comprising:
a second nasal prong configured to be insertable into another nostril of the patient, a third channel extending through the second nasal prong along the first direction; and
a second side port connectable to the tubes, the second side port including a fourth channel extending along the second direction, the fourth channel having a first end configured to insertably receive the tubes and a second end in communication with the third channel, the fourth channel comprising a third section at the first end having the first diameter, a fourth section having the second diameter, a third step between the third and fourth sections, and a fourth step between the fourth section and the second end of the fourth channel, the third step configured to prevent insertion of the first tubes into the third section and the fourth step configured to prevent insertion of the second tubes further into the fourth channel.

3. The respiratory nosepiece of claim 2 , further comprising a bridge section extending between the first and second side ports and configured to support the respiratory nosepiece against the patient.

4. The respiratory nosepiece of claim 1 , wherein the second channel further comprises an additional section having a third diameter smaller than the second diameter, the additional section extending between the second step and the second end of the second channel.

5. The respiratory nosepiece of claim 4 , wherein the first diameter is larger than the second diameter by an amount which corresponds to a wall thickness of the first tubes.

6. The respiratory nosepiece of claim 1 , wherein the second end of the second channel has a spherical shape configured to smoothly redirect flow of gas between the first and second channels.

7. The respiratory nosepiece of claim 1 , comprised of polyvinyl chloride, thermoplastic elastomer, silicone, ethylene propylene diene monomer, or urethane having a sufficiently low durometer to be flexible.

8. The respiratory nosepiece of claim 3 , wherein a top surface of the bridge section is curved so that a height of the bridge section along the first direction is reduced near a center point between the first and second nasal prongs.

9. The respiratory nosepiece of claim 8 , wherein side surfaces of the bridge section adjacent the top surface are curved so that a width between the side surfaces of the bridge section is reduced near the center point between the first and second nasal prongs.

10. The respiratory nosepiece of claim 3 , further comprising:
a fifth channel in the bridge section, the fifth channel having a first end in communication with the second end of the fourth channel and having a second end; and
an oral sampling port including a sixth channel extending along the first direction, the sixth channel having a first end in communication with the second end of the fifth channel and having a second end configured to be adjacent to a mouth of the patient.

11. The respiratory nosepiece of claim 10 , wherein the oral sampling port is beveled toward the mouth of the patient at the second end of the sixth channel.

12. A respiratory nosepiece comprising:
first and second nasal prongs configured to be insertable into nostrils of a patient;
a first side port having a first channel, the first channel having a first end configured to insertably receive tubes having different first and second diameters and a second end in communication with the first nasal prong; and
a second side port having a second channel, the second channel having a first end configured to insertably receive the tubes and a second end in communication with the second nasal prong,
each of the first and second channels comprising
a first section having the first diameter at the first end followed by a second section having the second diameter, wherein the first diameter is greater than the second diameter,
a third section following the second section, the third section having a third diameter smaller than the second diameter, and
a step between the second and third sections, and consisting of a wall portion only located along an upper inner circumference of the second channel.

13. The respiratory nosepiece of claim 12 , further comprising:
a bridge section extending between the first and second side ports and configured to support the nosepiece against the patient;
a third channel in the bridge section, the third channel having a first end in communication with the second end of the first channel and having a second end; and an oral sampling port extending along a same direction as the first and second nasal prongs, the oral sampling port including a fourth channel having a first end in communication with the second end of the third channel and having a second end configured to be adjacent to a mouth of the patient.

Assignees

• Koninklijke Philips Nv

Inventors

• Scampoli David

Classifications

• A61M2202/0208

  Oxygen · CPC title

• B29C2045/366

  using retractable pins · CPC title

• B29L2031/753

  Medical equipment; Accessories therefor (bloodbags, medical bags B29L2031/7148; artificial eyes B29L2011/0008) · CPC title

• B29C45/36

  having means for locating or centering cores · CPC title

• A61M16/085 Primary

  Gas sampling · CPC title