DE8616226U1 - Adjustment valve for anesthesia and / or ventilators - Google Patents

Description

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EMS Elektro ^ Mechänische Nürnberg, June 12th, 1986 | Systeme GmbH Reg * 28919

Description:

SILL VALVE FOR ANESTHETIC AND / ORED VENTILATION DEVICE

The innovation relates to an adjustment valve for anesthetic and / or ventilators according to the preamble of claim 1 *

There are already numerous anesthetic gas systems on the
Market in which the gas distributor forms a unit with lines for compressed air * oxygen and nitrous oxide * In addition, other gases such as halothane, enflurane and isoflurane can also be added.

The gas distributor can, for example, have outlets for gas mixers, oxygen flush valves, suction ejectors, the ventilator and additional devices. Reserve gas cylinders are connected, for example, with what is known as a pin index holder. In addition, there are special pressure gauges for
Supply and cylinder pressures available, which are color-coded according to the respective color standards for gases. If the oxygen pressure falls below a specified value, the nitrous oxide supply is automatically blocked. An alarm signal usually sounds at the same time.

A 3-gas mixer either mixes or mixes oxygen and air
Oxygen and nitrous oxide to the desired FiO value. There is also a low pressure inlet on the anesthesia machine,
via which anesthetic gases can be supplied.

Control elements on the anesthesia machine can be used to select whether the gas is coming directly from the patient via the hand ventilation equipment or whether the fan is for controlled and assisted ventilation is used.

An oxygen flush valve can be used to continuously high Gasfiow are supplied, whereby the anesthetic gas concentration can be changed quickly and, if necessary, flushed

Special measures are also taken to ensure that the ambient air is not exposed to anesthetic gases
is. With gas evacuation equipment, the exhaled gases are diverted into the gas evacuation system.

Overall, it can be said that modern anesthesia and ventilation devices are of a very high standard, | through which the medically optimal values can be set and adhered to with certainty.

For anesthesia and / or ventilation of children, especially
Small children, a special children's anesthesia system, predominantly the so-called "Kuhn system", is preferably used, although the desired dosability or application of the fresh gas flow is not possible with all anesthesia and / or ventilators.

The innovation is based on the task of an adjusting valve
to create, which enables a very reliable and sensitive adjustment of the gas quantities required in each case even with low flow rates.

The solution to this problem takes place according to the innovation by the
characterizing features of claim 1.

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Advantageous further developments result from the subclaims *

The innovation is described below with reference to the drawing figures for example explained. Show it:

Fig. 1 a rotationally symmetrical adjusting valve and ί Fig. 2 a scheriiatiouhe representation, from which the Zu =

Order of the adjustment valve results in the known devices.
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The adjusting valve shown in an exploded view in FIG. 1 10 consists of a fixed actuator 11

\ And a first actuator 11 movable relatively by rotation of actuator 12. The common axis of the two actuators 11 and 12 was designated by. 13 The gas flow entering in the direction of arrow 14 through a hose connection 29 arranged in the circular rear wall 15 first enters a cavity 17 and from there through bores 18 of small cross-section in the peripheral surface 19 of the movable actuator 12 into a groove 20 of the stationary actuator. This groove 20 extends only over part of the circumference, so that depending on the relative position of the movable actuator 12 to the fixed actuator 11, a more or less large part of the through bores 13 of the groove 20 is directly opposite and thus allows the gas a free passage. Where the through bores 18 do not face the groove 20 but the normal peripheral surface 22, gas cannot pass, since the normal peripheral surface 22 of the fixed actuator 11 and the associated peripheral surface 23 of the movable actuator 12 form a sealing sliding fit. Depending on the relative position of the fixed actuator 11 and the movable actuator 12, and thus on the number of the respective permeable passage openings 18, can

from the outlet opening 24 in the direction of the arrow 21 meter the escaping gas flow very sensitively and precisely.

The maximum available setting range can be determined by a Siell pin 25 in one actuator 11 or 12 and an associated guide groove in the other actuator 12 or 11.

The above-mentioned groove 20 for the passage of gas can have a constant passage cross-section. But it can also have a continuously expanding cross-section have which, for example, can create a helical closing edge. In addition, the groove 20 can also be divided into two sections 20a and 20b, the first section 20a being a continuously expanding one and the second section 20b has a constant passage cross section. Such a cross-sectional design the groove 20 has advantages in particular when not just one but several in parallel extending circumferential lines arranged through bores 18 are provided in the movable actuator 12. This will be in the first section 20a of the groove 20 initially only the through bores 18 of a first circumferential line un <i only subsequently also the passage openings 18 of a second or another perimeter released. In this way, the fine-tuning of the setting, especially in the Initial area further improved.

Through the appropriate choice of the spacing between the through-holes from each other and their diameter can be one according to the respective needs (constant or changing) scale factor can be specified.

For ergonomic reasons, the allocation of through-holes 18 to the groove 20 are chosen so that a clockwise rotation of the movable actuator 12 a reduction

tion and a left turn of the movable actuator 12 results in an increase in the gas flow.

In the adjustment valve 10 can in a relatively / simple manner a Kickback protection are provided, which in the simplest case consists of a circular disc 26 made of elastic-Dichtcridem Material is made, which is held freely movable via a spacer sleeve 27 and a retaining screw 28. At a Gas flow in the direction of arrow 14 becomes the resiliently sealing circular disk 26 in the direction of gas flow pressed to the side, but pressed against a sealing lip with a gas flow in the opposite direction. In this way, a backflow of infected gases coming from the patient into the system is definitely excluded.

The circular disk 26 serving as kickback protection can in principle both on the fixed actuator 11 as can also be arranged on the movable actuator 12. When arranged on the fixed actuator 11 is always a vertical It is easier to guarantee the suspension and thus a perfect function of the kickback protection. The order but can also take place on the gas connection nozzle 29, which is held in the actuator 12 via sealing rings (so-called O-rings) 30 if necessary will.

With the adjustment valve described, flow speeds from 0 to 20 l / min can be finely graduated and adjust reliably. The respective flow rate can after appropriate calibration using a scale on one of the both actuators 11 or 12 are specified, so that a pre-setting of the flow rate is possible at any time.

Fig. 2 shows a schematic representation from which the assignments of the adjustment valve described above for an anesthesia and ventilation apparatus known per se

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will. The adjustment valve can also be retrofitted into an existing apparatus without major modifications. It should only be ensured that the working pressure present at the connection point is 60 mbar and that the desired mixed gas is already available at this point.

If for certain reasons a working pressure deviating from 60 mbar is used, the actual gas flow can be based on the changed conditions using suitable diagrams be converted.

From the outlet opening 24 of the adjusting valve 10 this can Gas for example in a suitable pediatric anesthesia system, preferably in a so-called "Kuhn system", forwarded will. It has been shown that with the adjustment valve described above in an extremely simple manner a sensitive and reliable setting of the gas flow required in each case is possible.

The connection between the adjustment valve described above and the anesthesia or civil service device is preferably in Executed according to ISO standard.

Claims (10)

EMS Elektro-Mechanische Nürnberg, June 12th, 1986 Systeme GmbH Reg. 28919 ADJUSTING VALVE FOR ANESTHOSIS AND / OR VENTILATION BARLEY Protection claims: 1. Adjustment valve for anesthesia and / or ventilators, im essentially consisting of two axially symmetrical actuators that are assigned to one another and are movable relative to one another, of which the fixed actuator connected to the gas supply line and gas discharge line j, and the associated one second actuator is rotatable about its axis, characterized in that on a peripheral surface (22,23) of the one Actuator (11, 12) has a plurality of through bores (18) arranged in at least one circumferential line and in the other Actuator (11, 12) has an associated groove (20) with a sufficient passage cross-section. \ 2. Valve according to claim 1, characterized in that the Groove (20) has a constant cross section in the circumferential direction having. 3. Valve according to claim 1, characterized in that the groove (20) has a cross-section which widens in the circumferential direction having. 4. Valve according to claim 3, characterized in that the groove (20) has a helically extending closing edge & shows « 5. Valve according to claim 1, characterized in that the
NuI (20) has a first continuously widening cross-sectional section (20a) and an adjoining second section (20b) of constant cross-section. 6. Valve according to one of claims 1 to 5, characterized in that there are vid the vid
Through bores (18) of the individual lines are arranged offset from one another. 7. Valve according to one of claims 1 to 6, characterized in that that the through bores (18) have different diameters. 8. Valve according to one of claims 1 to 7, characterized in that that the spacing of the through bores (18) from one another is non-uniform. 9 valve according to one of claims 1 to 8, characterized in that that on the stationary actuator (11) a disc-shaped element (26) functioning as a check valve Circular cross-section made of elastic-sealing material is suspended freely oscillating. 10. Valve according to claim 9, characterized in that the element (26) via a cold screw (28) and a spacer sleeve (27) is suspended so that it can move easily.