MOUTH PIECE FOR SUCTION OF EXHALED AIR

Abstract: Mouth piece for suction of exhaled air from e.g. a dental patient, at which the mouth piece is to be applied close below the mouth of the patient and showing one or several suction openings (2, 3, 4), and is connected to a suction conduit (6), showing members (7, 8) extending to the patient, which are intended to be brought into the mouth of the patient resting to the inner side of the mouth cavity in that way that the mouth piece is kept at the mouth. The projecting members include two sideways from the mouth piece projecting wings (7), which are resting to the inner side of the patient's cheeks when they are brought into the mouth.

Description: MOUTH PIECE FOR SUCTION OF EXHALED AIR TECHNICAL AREA The present invention concerns a mouth piece for withdrawal of exhaled air from e.g. a dental patient, at which the mouth piece is to be applied close below the patients mouth, and showing one or several suction ope¬ nings, and connected to a suction conduit, which is con¬ nected to a low pressure device. BACKGROUND TECHNICS Suction devices at locations for treatment of patients will be found in order to withdraw by suction preferably anaesthetic gas from patients during opera¬ tion. The Swedish patent publication SE 7809993-4 shows such a suction device, which includes a mask which is connected to the patient and which also is connected to a low pressure device, by help of which gases and exhaled air are withdrawn from the patient. An anaesthetic mask for withdrawal of anaestetic gases and exhaled air also is described in the Swedish patent publication SE 8008962-6. The Swedish patent publication SE 8404976-6 de¬ scribes another embodiment of a mask for withdrawal of anaesthetic gases and exhaled air, which includes a mem- ber, which is applied directly below the patients mouth and which is provided with a slot-like aperture, which is connected to a low pressure device by a cavity behind. The suction member for withdrawal is kept fastened to the chin of the patient by help of straps which are led be- hind the head of the patient. The suction member is con¬ nected with the low pressure device by help of suction hoses extending from the cheek of the patient in a direc¬ tion to the back of the head. Another drawback with the latter suction device is that it is difficult to keep fixed to the chin at treatment of teeth or operations in the mouth cavity. Another drawback with this device is that it preferably is intended to be used with the patient lying down, wich is a condition for saliva and other fluids to flow from the mask and to be withdrawn in the suction conduits. At dental treatment with the pa¬ tient sitting up this suction of fluids however is un- satisfactory. DESCRIPTION OF THE INVENTION The purpose with the present invention is to achieve a device for withdrawal by suction of exhaled air, which do not show the drawbacks of the known devi- ces. The purpose has been achieved by a suction mouth piece, which is intended to be applied directly below the mouth of the patient and showing one or several suction openings, and connected to a suction conduit. The suction mouth piece according to the invention is characterized by showing members projecting to the patient, which are intended to be brought into the mouth of the patient res¬ ting at the inner side of the mouth cavity in that way that the mouth piece is kept at the mouth. Preferably the projecting members include two side-ways from the mouth piece projecting wings, which are resting towards the inner side of the patients cheeks when brought into the mouth. Each wing by that preferably is applied upon a post extending backwards to the mouth of the patient. The suction mouth piece according to the invention furhter includes a U-shaped suction chamber, which upwards to the mouth directed concave innerside, extending between its two shanks, is showing suction ope¬ nings, and which downwards from the mouth directed side is showing a connection for a suction conduit. Another suction opening can be applied at the outer end of each shank of the U-shaped suction chamber. In an alternative embodiment of the mouth piece according to the invention each wing is applied on a post which in its turn is turnable and adjustable in different positions in relation to the suction chamber. Preferably each post is turnable around an axis extending parallel to an axis through the outer ends of the shanks of the suction chamber. Each post also preferably can be tele¬ scopic extendable in its longitudinal direction. In the alternative embodiment of the invention it is also to prefer that each wing is turnable applied on the post and adjustable in different positions in relation to the same. By that the wings contact with the patients mouth cavity can be adjusted in that way that the mouth piece can be brought in a desired position at the mouth of the patient and also in that way that discomfort feelings is avoided for the patient. DESCRIPTION TO DRAWINGS The invention is described below as an example of an embodiment according to the drawings enclosed. Figure 1 shows a mouth piece according to the invention applied at the mouth of a dental patient. Figure 2 shows the mouth piece according to fi¬ gure 1 in a front view. Figure 3 shows the mouth piece according to fi¬ gure 2 from the left. Figure 4 shows the mouth piece according to fi¬ gure 2 from above. Figure 5 shows the mouth piece according to fi¬ gure 2 from below. Figure 6 shows an alternative embodiment of the mouth piece according to the invention from behind. Figure 7 shows the mouth piece according to fi¬ gure 6 from the left. The mouth piece according to figure 1-5 includes a U-shaped suction chamber 1 , the upper part of which is intended to be applied close below the mouth of e.g. a dental patient as shown on figure 1. The suction chamber 1 shows two first suction openings 2, which are arranged at the outer end of each shank of the suction chamber 1 , and two second suction openings 3, which are arranged close to each first suction opening 2, in that side of the suction chamber 1 wich is directed to the mouth of the patient. A third suction opening 4 is arranged at the lowermost point in the side of the suction chamber 1 showing the two second suction openings 3« Further the suction chamber 1 shows a pipe connection 5 at its down¬ wards directed side, which is intended to be connected to a low pressure device, not shown on the figures, by a suction hose 6, shown with a broken line on figure 1. The pipe connection 5 shows a collar 5.1 to which the end of the hose 6 is intended to rest when applied on the pipe connection 5. For the placing at the mouth of the patient each shank of the suction chamber 1 carries a wing 7, projec¬ ting sideways from each shank which is arranged on a post 8, which in its turn projects backwards to the mouth of the patient. When the mouth piece is brought into the mouth of the patient the wings 7 by that will rest to the cheeks of the patient while each post 8 rests to the cor¬ ners of the patient mouth. Each post in the example is constituted by a half-cylindrical member, the cylindrical envelope surface of which is directed to the side of the mouth piece and gives a pliable contact to the patients corners of the mouth. The wings 7 by that are located in a plane extending parallel to a plane through the flat backside of the suction chamber 1 directed to the pa¬ tient. The alternative embodiment of the mouth piece according to figure 6 and 7 includes, as in the first embodiment, a U-shaped suction chamber 1, which shows suction openings 2, 3, 4 and a pipe connection 5 for a suction hose. Each wing 7 is turnable applied upon a cy- lindrical post 8 around a first pivot 9 extending down¬ wards in the post 8. By the friction in pivoting each wing 7 can be brought in a desigered position in relation to the post 8. Each post 8 in its turn is firmly attached to a second pivot 10, which is turnable in a friction holder 11 on each shank to the mouth piece. Further the second pivot 10 is axially displaceable in the friction holder 1 , by which the posts 8 can be displaced from or to each other or be turned depending of the shape and the size of the patients mouth. By turning the wings 7 and the posts 8 around their pivots 9, 10 the contact of the wings 7 in the mouth cavity of the patient can be adjus- ted in that way that the mouth piece can be brought in a desired position at the mouth of the patient. Alternatively each post 8 can be turnable and axially displaceble applied in a holder, extending in a right angle to the plane through the suction chamber 1. However this is not shown on the figures. By that the wing 7 can be firmly attached on each post 8 and possible to turn together with the same, or to be axially dis¬ placed with the same. The holder also preferably can be constituted by a part of the sides of each shank on the suction chamber 1 which are directed to each other.

Claims: PATENT CLAIMS 1. Mouth piece for suction of exhaled air from e.g. a dental patient, at which the mouth piece is to be applied close below the mouth of the patient and showing one or several suction openings (2, 3 . 4), and members (7, 8), which are intended to be brought into the mouth of the patient resting to the inner side of the mouth cavity in that way that the mouth piece is kept at the mouth and connected to a suction conduit (6), c h a - r a c t e r i z e d in that the projecting members in¬ clude two sideways from the mouth piece projecting wings (7), which are arranged on a distance from each other at each side of the patients mouth resting to the inner side of the patients cheeks when they are brought into the mouth so that the corners of the mouth of the patient are kept away from each other. 2. Mouth piece according to claim 1, c h a ¬ r a c t e r i z e d in that each wing (7) is arranged on a post (8), projecting backwards to the mouth of the patient from the back wall of the suction chamber (1). 3. Mouth piece according to claim 2, c h a ¬ r a c t e r i z e d in that each wing (7) is arranged on a post (8), which in its turn is turnable around and ad¬ justable in different positions in relation to the suc- tion chamber (1). 4. Mouth piece according to claim 3 » c h a ¬ r a c t e r i z e d in that each post (8) is turnable around an axis extending parallel to an axis through the outer ends of the shanks of the suction chamber (1). 5. Mouth piece according to claim 2-5, c h a ¬ r a c t e r i z e d in that each wing (7) is turnable arranged on a post (8) and adjustable in different posi¬ tions in relation to the same. 6. Mouth piece according to claim 3, c h a - r a c t e r i z e d in that each post (8) is turnable around an axis extending in a right angle to the plane through the shanks of the suction chamber (1). 7. Mouth piece according to claim 1-6, c h a ¬ r a c t e r i z e d in that it includes a U-shaped suc¬ tion chamber (1), which concave innerside directed up¬ wards to the mouth, extending between its two shanks, shows suction openings (3 » 4) and which downwards from the mouth directed side shows a connection (5) for the suction conduit (6). 8. Mouth piece according to claim 7, c h a ¬ r a c t e r i z e d in that another suction opening (2) is arranged at the outer end of each shank of the U-shaped suction chamber (1).

Inventors: WILLIAMSSON BOERJE, WILLIAMSSON, BOERJE
Applicants: WILLIAMSSON BOERJE, WILLIAMSSON, BOERJE
Application year: 1989
Main classification: A61M16
IPC codes: A61M16