DOUBLE-LUMEN OROPHARYNGEAL CANNULA

Abstract

A double-lumen oropharyngeal cannula of the type used for pervious maintenance of the upper airway of a patient under anesthetic sedation, the cannula including a single piece formed by a biting block from whose frontal portion a frame is projected that composes a base for laying in the patient's mouth, while on the opposite side a channel is projected, destined for inserting a bronchofibroscope with or without orotracheal tube; the biting block has a reduced-width oblong shape where openings are provided, one opening being circular peripheral shape and having extended diameter and another parallel opening of oblong shape, both, separated by an orthogonal wall in order to compose the double lumen to enable the entry and exit of gas during inspiration and expiration or insertion of an orotracheal rescue tube and to allow insertion of a medical instrument such as an endoscopic or echoesophageal probe and/or a bronchofibroscope.

Claims

1. An oropharyngeal cannula of the type used for insertion in an upper airway of a patient, the cannula comprising: a piece having a biting block from whose frontal portion there is projected a frame that comprises a base for laying in the patient's mouth, while on the opposite side there is projected a channel destined for inserting a medical instrument therein, wherein the biting block presents a reduced-width oblong shape having at least two openings, a first opening and a second parallel opening, the first and second openings separated by an orthogonal wall in order to compose a double-lumen to allow the entry and exit of gas during inspiration and expiration or insertion of an orotracheal rescue tube and to allow insertion of a medical instrument, wherein near upper and lower edges of the second opening are provided oppositely located holes that extend in tubular profiles in the biting block, each of the holes respectively configured for the receipt of a tubular extension, one tubular extension for gas supply to the patient and another tubular extension for passing of carbon dioxide eliminated by the patient during expiration.

2. The oropharyngeal cannula of claim 1, wherein the first opening is of circular peripheral shape and the second opening is of oblong shape.

3. The oropharyngeal cannula of claim 1, wherein the frame is of oblong shape with an enlarged total area to stabilize the cannula in the patient's mouth.

4. The oropharyngeal cannula of claim 1, wherein from the opening and at an opposite side of the frame, the biting block develops the channel having a lateral wall formed by a straight stretch followed by an arched stretch with a radius composing channel elevation to support an anatomical structure that can collapse on the airway.

5. The oropharyngeal cannula of claim 1, wherein a free end of the channel is rounded

6. The oropharyngeal cannula of claim 1, wherein the frame provides lateral distal openings configured for the transfer of a hook and loop fastener strap or tiedown tape to attach the oropharyngeal cannula to the patient's neck.

7. The oropharyngeal cannula of claim 1, wherein the frame comprises rotated CT shape end handles.

8. The oropharyngeal cannula of claim 1, wherein the medical instrument comprises an endoscopic probe or a transesophageal echo/fibroscope.

9. An oropharyngeal cannula of the type used for insertion in an upper airway of a patient, the cannula comprising: a piece having a biting block from whose frontal portion there is projected a frame that comprises a base for laying in the patient's mouth, while on the opposite side there is projected a channel destined for inserting a medical instrument therein, wherein the biting block presents a reduced-width oblong shape having at least two openings, a first opening of circular peripheral shape and a second parallel opening of oblong shape, the first and second openings separated by an orthogonal wall in order to compose a double-lumen to allow the entry and exit of gas during inspiration and expiration or insertion of an orotracheal rescue tube and to allow insertion of a medical instrument.

10. The oropharyngeal cannula of claim 9, wherein near upper and lower edges of the second opening are provided oppositely located holes that extend in tubular profiles in the biting block, each of the holes respectively configured for the receipt of a tubular extension, one tubular extension for gas supply to the patient and another tubular extension for passing of carbon dioxide eliminated by the patient during expiration.

11. The oropharyngeal cannula of claim 9, wherein the frame is of oblong shape with an enlarged total area to stabilize the cannula in the patient's mouth.

12. The oropharyngeal cannula of claim 9, wherein from the opening and at an opposite side of the frame, the biting block develops the channel having a lateral wall formed by a straight stretch followed by an arched stretch with a radius composing channel elevation to support an anatomical structure that can collapse on the airway.

13. The oropharyngeal cannula of claim 9, wherein a free end of the channel is rounded

14. The oropharyngeal cannula of claim 9, wherein the frame provides lateral distal openings configured for the transfer of a hook and loop fastener strap or tiedown tape to attach the oropharyngeal cannula to the patient's neck.

15. The oropharyngeal cannula of claim 9, wherein the frame comprises rotated CT shape end handles.

16. The oropharyngeal cannula of claim 9, wherein the medical instrument comprises an endoscopic probe or a transesophageal echo/fibroscope.

17. An oropharyngeal cannula of the type used for insertion in an upper airway of a patient, the cannula comprising: a piece having a biting block from whose frontal portion there is projected a frame that comprises a base for laying in the patient's mouth, while on the opposite side there is projected a channel destined for inserting a medical instrument therein, wherein the biting block presents a reduced-width oblong shape having at least two openings, a first opening of circular peripheral shape and extended diameter and a second parallel opening of oblong shape, the first and second openings separated by an orthogonal wall in order to compose a double-lumen to allow the entry and exit of gas during inspiration and expiration or insertion of an orotracheal rescue tube and to allow insertion of a medical instrument, wherein near upper and lower edges of the second opening are provided oppositely located holes that extend in tubular profiles in the biting block, each of the holes respectively configured for the receipt of a tubular extension, one tubular extension for gas supply to the patient and another tubular extension for passing of carbon dioxide eliminated by the patient during expiration, wherein the frame is of oblong shape with an enlarged total area to stabilize the cannula in the patient's mouth, wherein from the opening and at an opposite side of the frame, the biting block develops the channel having a lateral wall formed by a straight stretch followed by an arched stretch with a radius composing channel elevation to support an anatomical structure that can collapse on the airway, and wherein a free end of the channel is rounded.

18. The oropharyngeal cannula of claim 17, wherein the frame provides for lateral distal openings, also oblong in shape, and rotated T shape end handles, the distal openings are configured for the transfer of a hook and loop fastener strap or tiedown tape to attach the oropharyngeal cannula to the patient's neck.

19. The oropharyngeal cannula of claim 18, wherein the frame further comprises rotated T shape end handles.

20. The oropharyngeal cannula of claim 17, wherein the medical instrument comprises an endoscopic probe or a transesophageal echo/fibroscope.

Description

DESCRIPTION OF THE DRAWINGS

[0021] To complement this description in order to obtain a better understanding of characteristics of one or more embodiments of this invention and according to a preferred practical embodiment of the same, a set of drawings is appended hereto, where, in an exemplary not limiting manner, its functions and characteristics are represented:

[0022] FIGS. 1 and 2 show front and rear perspective views of a double-lumen oropharyngeal cannula according to an embodiment of the invention;

[0023] FIG. 3 shows a front view of a double-lumen oropharyngeal cannula according to an embodiment of the invention;

[0024] FIG. 4 shows a top view of a double-lumen oropharyngeal cannula according to an embodiment of the invention;

[0025] FIG. 5 represents a longitudinal cut-off view A.A shown in FIG. 3;

[0026] FIG. 6 illustrates a cross-sectional view B.B. shown in FIG. 4; and

[0027] FIG. 7 shows a view of the use of a double-lumen oropharyngeal cannula according to an embodiment of the invention.

DETAILED DESCRIPTION

[0028] With reference to FIGS. 1-7, an embodiment of a double-lumen oropharyngeal cannula is presented. According to an embodiment of the invention, there is provided an oropharyngeal cannula (10) having double lumens (L1)/(L2) of the type used for superior airway pervious maintenance of patients, e.g., in cases of patients under anesthetic sedation in (elective) procedures such as transesophageal echocardiography, upper digestive endoscopy and/or retrograde endoscopic cholangiopancreatography, or in cases of patients with lowered level of consciousness in hospital medical procedures, such as fiber optic bronchoscopy mounted with orotracheal tube.

[0029] In an embodiment, the cannula (10) is comprised by a single piece (20) formed by a biting block (21) from whose frontal portion there is projected a frame (22) that composes the base for laying in the patient's mouth, while on the opposite side a channel (23) is projected, destined for inserting a medical instrument such as a bronchofibroscope with or without orotracheal tube.

[0030] According to an embodiment, the biting block (21) has a reduced-width oblong shape (11) where openings are provided, one opening (21A) being of circular peripheral shape and having an extended diameter (d1) and another parallel opening (21B) of oblong shape, both, separated by orthogonal wall (21C) in order to compose the double lumen (L1)/(L2) to enable the entry and exit of gas during inspiration and expiration or insertion of orotracheal rescue tube (TR) and to enable insertion of a medical instructions such as an endoscopic/transesophageal echo probe/fibroscope (TF).

[0031] Near the upper and lower edges of the opening (21B) that composes the lumen (L1) are opposite holes (21c) and (21d) that extend in tubular profiles in the biting block (21) for the receipt of tubular extensions (30A) and (30B). The extension (30B) is designed for gas (e.g., oxygen) flow offered to the patient, while the tubular extension (30A) is connected to a specific device (e.g., a capnograph (not illustrated)) for measuring the level of carbon dioxideCO.sub.2eliminated by the patient during expiration.

[0032] The front face of the biting block (21) provides an oblong-shaped frame (22) with an enlarged total area (AT) for stabilization of the cannula (10) in the patient's mouth. Further, the frame (22) provides lateral distal openings (22a), also, of oblong shape and having rotated T shape end handles (22b). These openings (22a) are idealized for the transfer of, e.g., a hook and loop fastener strap or tiedown tape (30) for attaching the cannula to the patient's neck.

[0033] From the opening (21B) and on the opposite side the frame (22) of the biting block (21), there develops the airway channel (23) whose lateral wall (23a) is formed by a straight stretch (t1) in length (E1) following by an arched stretch (24c) with radius (r1) forming channel elevation to support an anatomical structure which may collapse on the airway, e.g., tongue and/or posterior pharynx. The free end (23b) of the channel (23) is rounded.

[0034] In an embodiment, there is provided a double-lumen oropharyngeal cannula, more precisely an oropharyngeal cannula (10) having double lumens (L1)/(L2) of the type used for the pervious maintenance of the upper airway of patients, for example, under anesthetic sedation in elective procedures such as transesophageal echocardiography, upper digestive endoscopy and/or retrograde endoscopic cholangiopancreatography, or in cases of patients with lowered level of consciousness in emergency hospital medical procedures, such as fiber optic bronchoscopy mounted with an orotracheal tube; the cannula (10) comprising a single piece (20) formed by a biting block (21) from whose frontal portion there is projected a frame (22) that composes the base for laying in the patient's mouth, while on the opposite side there is projected a channel (23) destined for, for example, inserting a bronchofibroscope with or without an orotracheal tube, wherein the biting block (21) presents a reduced-width oblong shape (11) where openings are provided, one opening (21A) of circular peripheral shape and extended diameter (d1) and another parallel opening (21B) of oblong shape, both, separated by an orthogonal wall (21C) in order to provide the double lumens (L1)/(L2) to allow, for example, the entry and exit of gas (e.g., air) during inspiration and expiration or insertion of an orotracheal tube (RT) and to allow, for example, the insertion of an endoscopic probe/transesophageal echo/fibroscope (TF); wherein near the upper and lower edges of the opening (21B) that compose the lumen (L1) are provided oppositely located holes (21c) and (21d) that extend in tubular profiles in the biting block (21) for the receipt of tubular extensions (30A) and (30B), the tubular extension (30B) is, for example, idealized for oxygen flow offered to the patient, while the tubular extension (30A) is, for example, for connection to a specific apparatus, such as a capnograph for measuring the levels of carbon dioxideCO.sub.2eliminated by the patient during expiration; wherein the front face of the biting block (21) provides an oblong frame (22) with an enlarged total area (AT) to stabilize the cannula (10) in the patient's mouth; wherein from the opening (21B) and at an opposite side the frame (22) of the biting block (21) develops the channel (23) whose lateral wall (23a) is formed by a straight stretch (t1) in length (E1) followed by an arched stretch (24c) with radius (r1) composing channel elevation to support an anatomical structure that can collapse on the airway, e.g., the tongue and/or posterior pharynx; and wherein the free end (23b) of the channel (23) is rounded. In an embodiment, the frame (22) has lateral distal openings (22a), also oblong in shape, and rotated T shape end handles (22b), the openings (22a) for the transfer of, e.g., a hook and loop fastener strap or tiedown tape (30) to attach the frame to the patient's neck.

[0035] When this invention is put into practice, modifications may be made with regard to certain details of construction and shape, without this implying a move away from the fundamental principles that are clearly substantiated in the set of claims, thus being understood that the description and terminology used is not intended to limit the scope of the invention.