CN87214440U - Measuring device for air flow resistance of nose - Google Patents

Abstract

The utility model discloses a nasal breathing function test apparatus for medical use, which is composed of a test joint of the air flow of a nose, a test joint of the air pressure of the nose and a display recording device. The utility model is characterized in that a damping vent hole is arranged on the test joint of the air flow of the nose, and the quantity of the air flow can be tested according to the principle of an orifice plate flowmeter; the display device adopts an air pressure and air flow display board of the water column of a double U-shaped pipe, which is matched with a positioning reading pressure plate; a recording apparatus is composed of an air drum which is provided with two sensing thin films, a linkage system which is an approximate quadrangle, and a recording pen. The utility model has the advantages of simple structure and convenient use. When the utility model is used, the resistance of the air flow of expiration and inspiration of the left nose cavity and the right nose cavity of can be accurately tested respectively, and the resistance curve of the air flow of the nose can be recorded automatically.

Description

Measuring device for air flow resistance of nose

This utility model is a kind of medical apparatus that detects the nasal respiration function.

The detection of nasal respiration function is subjected to the attention of medical circle gradually.Chang Yong method was in the past: be decorated with graduated metal or glass lens places the place ahead, nostril of patient with one, observe on minute surface, form water smoke when exhaling size to estimate BITONG gas situation.Though this method is simple but inaccurate.Recently Britain Morgan company produces a kind of Electronic Nose measurement of airway resistance device, and Japanese Chest Co., Ltd. has then produced a kind of comprehensive nose impedance measuring device with electronic computer.These instruments all are to be converted to the signal of telecommunication by special face shield, draught head and throughput when sucking element or nose Fructus Canarii albi head with nose breathing through transducer, import special electronic machine, demonstrate nose air pressure and air flow value by fluorescent screen or recording equipment, machine is handled and is traced into resistance curve as calculated at last.Though these devices can obtain more accurate result, because of complex structure, cost an arm and a leg, operation inconvenience is difficult to popularize.

Task of the present utility model is that a kind of improved nose determination of resistance to airflow device will be provided, it was not only simple and practical but also can measure the air-breathing and multiple numerical value such as the resistance of exhaling or per nasal peak inspiratory flow of left and right sides nasal cavity more respectively, and can trace out resistance curve automatically.

Task of the present utility model is finished as follows: nose air-flow test splice and nose air pressure test splice are connected by pressure sensing Guan Yushuan u shape pipe water column pressure flow display panel and asal resistance monitor separately, form air-flow test macro, air pressure test macro and air pressure air-flow relation curve and trace system.The air pressure test macro adopts the mode of u shape pipe water manometer, and the air pressure test splice can be made fusiformis Fructus Canarii albi head to make anterior rhinomanometry, also can connect glass or metal winding pipe and make posterior rhinomanometry in mouth.The air-flow test macro adopts the principle of orifice flowmeter to make, one damping passage is arranged on the nose air-flow test splice, 4 to 6 millimeters of diameters, be positioned near an end that connects the pressure sensing pipe, this pressure sensing pipe top closure, sidewall has passage, stretches to the middle part of nose air-flow test splice.When air-flow passes through from nose air-flow test splice, will inside and outside the damping passage, produce draught head, throughput atm difference more is also big more, can calculate by the computing formula of orifice flowmeter, also can proofread and correct with accurate throughput meter earlier, promptly cross nose air-flow test splice, by its air pressure that on u shape pipe water column, demonstrates corresponding flow scale that draws by the air communication of a known mass flow.Two test splices should be placed the bilateral prenaris simultaneously during the gas-flow resistance of test nose, notice that contact pressure and position are suitably suitable, compressing nasal vestibule not only air tight but also within reason.Advise the air-breathing or expiration of testee, the air pressure at the in fact very approximate offside choana of the air pressure that this moment, the air pressure test splice was measured place.The pressure that nose air-flow test splice is measured is the inside and outside draught head of damping passage, also promptly represents corresponding throughput.Pressure differential between two u shape pipes is the pressure differential of measuring before and after the throughput one side nasal cavity.Measured draught head and throughput and just can be converted into the nose gas-flow resistance by relevant hydromechanical formula, medically often done approximate calculation with Ohm's law, be about to the numerical value for gas-flow resistance of likening to of draught head and throughput, unit is cmH2O.sec/L.Can test left and right sides nasal cavity respectively with said method exhales and air-breathing gas-flow resistance.As testing the per nasal peak inspiratory flow, then only nose air-flow test splice is placed a side prenaris, block another nostril, advise testee do the best air-breathing get final product the numerical value of surveying.There is a positional readings pressing plate below of two u shape pipes, can make the water column location stop to flow during past pressing down, so that observe counting in detail.The asal resistance monitor mainly is to be equipped with linkage and pen constitutes by two tympanites, and two tympanites respectively are equipped with the mutually perpendicular sense film of one side, and sense film is connected with forming to be similar to tetragonal trace and to trace arm by driving needle.Tympanites is connected with nose air-flow test splice and nose air pressure test splice respectively by the pressure sensing pipe.When test, then move in or out, drive linkage and pen and on the air pressure air-flow x-y of recorder chart coordinate, retouch out nose gas-flow resistance curve because of the sense film on the air pressure change tympanites.

This utility model is simple in structure, and cost is low, and is easy to use, and the degree of accuracy height can be tested the multiple function of nasal airflow situation, can trace nose gas-flow resistance curve automatically again.

Below in conjunction with the embodiment accompanying drawing this utility model is described in further detail.

Fig. 1 is the structural representation of this utility model test splice and two u shape pipe water column display panels.

Fig. 2 is the side view of positional readings pressing plate.

Fig. 3 is the structural representation of this utility model nose gas-flow resistance monitor.

With reference to accompanying drawing, the nose air-flow test splice (2) of a fusiformis hollow of making by plastics or metal material, diameter is 12 to 16 millimeters, long 50 to 80 millimeters, smooth at the blunt circle of an end that contacts with the nostril, the centre has the passage (1) of 6 to 10 millimeters of diameters.Have the damping passage (5) of 4 to 6 millimeters of diameters on the nose air-flow test splice (2), be positioned near an end that connects pressure sensing pipe (6).Pressure sensing pipe (6) top closure has several apertures (4) near vertical sidewall, stretches to the middle part of nose air-flow test splice (2).The profile of nose air pressure test splice (3) can be similar to nose air-flow test splice (2), but the undamped passage, also useable glass or metal material are made syphon shape, to make posterior rhinomanometry.Nose air-flow test splice (2) also can be made mask-like, and pressure sensing pipe (6) is made by the plastic tube or the sebific duct of 3 to 5 millimeters of diameters, long 60 to 100 centimetres.Two u shape pipe water column display panels (7) are made of base plate (10), u shape pipe (11), positional readings pressing plate (12) and base.U shape pipe (11) is made by the lucite pipe or the glass tubing of 3 to 5 millimeters of diameters, high 40 to 50 centimetres, its bottom connects one section elastic force flexible pipe (14), the elastic force flexible pipe should adopt silica gel tube to make, there is a positional readings pressing plate (12) that flexibly connects with base plate (10) top, has two presser feets (13) to be pressed on the elastic force flexible pipe (14) under the positional readings pressing plate.When with positional readings pressing plate (12) when pressing down, presser feet (13) is about to elastic force flexible pipe (14) and compresses, blocking-up current wherein make the water column location.U type pipe (9) the rear base plate that links to each other with nose air-flow test splice (2) is marked with the throughput scale, and u shape pipe (8) rear base plate that links to each other with nose air pressure test splice (3) is marked with baroscale.The dress clear water is to the zero-bit place in stage casing in the u shape pipe (11).Last two tympanites of nose gas-flow resistance monitor (20) (17) respectively are equipped with one side mutually perpendicular sense film (19), and sense film can be made with rubber film or wavy metal thin film.As adopt rubber film, and should be furnished with standby replacing parts, so that change when rubber film is aging, a driving needle (18) is fixed at sense film (19) middle part, driving needle top and trace (21) flexibly connect.The near-end of trace (21) connects into and decides fulcrum with being fixed on support (16) on the tympanites (17), and it is that horizontally rotating of certain angle made in the axle center that trace (21) can be decided this fulcrum.Regulating spring (15) is housed between trace (21) and the support (16) and regulates knob, in order to regulate degree of complying with and the angle that trace rotates.The not end of trace (21) connects into a Movable joint (22) with the near-end of tracing arm (26), traces arm and can Movable joint (22) do to horizontally rotate for the axle center.Tracing the arm far-end for two joins mutually and fixes a recording stylus (24).When two traces rotated separately respectively, recording stylus (24) two curves that just intersecting that promptly draw on recorder chart (25) formed the x-y axle.Proper extension trace (21) and trace the length of arm (26) reduces corner, but the x-y axle near linear of retouching out.Be connected with nose air-flow test splice (2) by the pressure sensing pipe as tympanites that will be relevant with tracing the x axle, then the x axle is represented throughput, and corresponding y axle is then represented the nose draught head.When measuring, pressure in two tympanites (17) changes simultaneously, through sense film (19), and trace (21) and trace arm (26) band recording stylus (24), just can on recorder chart (25), trace the pressure gas stream relation curve of giving vent to anger, i.e. nose gas-flow resistance curve (23).Nose gas-flow resistance monitor (20) can with two u shapes pipe water column display panels (7) uses that be combined as a whole, also can distinguish use separately.The x-y axle must be consistent with the index correction of two u type pipes.

Claims (5)

1, a kind of nose determination of resistance to airflow device that constitutes by nose air-flow test splice [2], nose air pressure test splice [3] and nose gas-flow resistance monitor [20], it is characterized in that: a damping passage [5] is arranged on the nose air-flow test splice [2], and nose air-flow test splice [2] and nose air pressure test splice [3] are connected by separately pressure sensing pipe [6] and dual U-shaped pipe water column display panel [7] and the nose gas-flow resistance monitor [20] of being furnished with two tympanites [17].

2, by the described nose determination of resistance to airflow of claim 1 device, it is characterized in that: damping passage (5) diameter on the nose air-flow test splice (2) is 4 to 6 millimeters, be positioned near an end that connects pressure sensing pipe (6), this pressure sensing pipe top closure, sidewall has passage (4), stretches to the middle part of nose air-flow test splice (2).

3, by claim 1 or 2 described nose determination of resistance to airflow devices, it is characterized in that: u shape pipe (11) bottom of two u shape pipe water column display panels (7) connects one section elastic force flexible pipe (14), there is a positional readings pressing plate (12) that flexibly connects with base plate (10) elastic force flexible pipe top, has two presser feets (13) to be pressed on the elastic force flexible pipe (14) under the positional readings pressing plate.

4, by claim 1 or 2 described nose determination of resistance to airflow devices, it is characterized in that: last two tympanites of nose gas-flow resistance monitor (20) (17) respectively are equipped with one side mutually perpendicular sense film (19), and sense film is connected with forming to be similar to tetragonal trace (21) and to trace arm (26) by driving needle (18).

5, by the described nose determination of resistance to airflow of claim 4 device, it is characterized in that: the near-end of trace (21) is a fulcrum with support (16), the other end connects traces arm (26), trace the arm far-end for two and join mutually and fix a recording stylus (24), between trace (21) and the support (16) regulating spring (15) is housed.

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