DE2023769A1 - Control unit for ventilators - Google Patents

Description

Applicant: Leipzig, the 3Ο. ^ ΤΗ <7ϋ

VEB Medical Technology Leipzig
7055 Leipzig
Franz-Flenuaing-StraiBe 43

Authorized representative:
Engineer Rudolf Kuller im
VEB Medical Technology Leipzig
7035 Leipzig
Franz-Flemming-Strasse 43

Control unit for ventilators

The invention relates to a control unit for ventilators which, in terms of its technical design, has a logical link between components (Dreloba system) for all problems. The logic system operates with a uniform pressure level, so that a λ direct connection within the circuit is possible. The most common pressure range for logical pneumatic

2 static switching is between 0 and 1.4 kp / cm The logic elements are obtained from the appropriate arrangement and functional selection of the connection channels these signal-linked logic units (modules) different Functions. For practical use

- 2 109841/1028

However, the dimensions of a holding system are generally the same peripheral devices. On the one hand, these form the physical quantities such as pressure, temperature, displacement, Electricity etc. to signals that are processed by the switching system and vice versa set the signals of the Sehaltsystem "into the required output signals. Modern ventilators allow a variety of ventilation types again in different variations. The problem that exists for the anesthesiologist is error-free Preselection or the changeover to the desired type of ventilation therefore requires a pneumatic program control or even pole program control. The selected information must be passed on to the various actuators via the logic units and result from the preselection the type of ventilation such as hand ventilation, spontaneous ventilation, intermittent positive pressure ventilation (IPPB) or alternating positive-negative pressure ventilation (APNB) or its variants such as e.g. 3. Anesthesia - no regression, anesthesia - not rebreathing-free or without anesthesia.

A ventilator has already been proposed in which the pneumatic logic elements of the control system Building blocks and finally to integrated signal-linked Circuits are summarized. Your peripheral devices are in terms of input and output power and switching times and of course the lifespan on the logic elements tailored and adapted to the overall system.

. - 5 -109841 / 1-02 »

The information is entered manually using a limit switch, whose basic component is a double membrane "■ ■ relay is that either directly mechanically or via a Pressure divider is controlled. The number of ventilation variants therefore sets the same number of limit switches in advance. Accordingly, when choosing the ventilation variant, all switches must be checked for their correct position.

The purpose of the invention is to avoid incorrect switching (

To achieve programming, whereby a downshift-free selection of the ventilation variant is to be aimed for. The object of the invention is to improve the circuitry of the control unit in such a way that, using combined pneumistors, one and the same switch basically transmits all of the information given to the control of the ventilator. According to the invention, the object is achieved in that the switch is a central control element with a logical control. ä linkage of the integrated circuits below, the logical link being established by means of combined pneumistors. This means that the anesthetist only needs to operate one switching element in order to switch from one ventilation variant to the other. Operating errors are excluded and the minimum operating time is achieved. The central control element can be a preprogrammed rotary selector switch, a push button unit

- 4 -10 9841/1028

with return protection, an air pulse release slide o.a. switch unit. The pneumistars are preferably used to form an "and" function and / or a "Or" function. If necessary, the logical linkage of the central control element can also be carried out electronically or electrical circuits must be produced.

Another possibility arises in the transfer of functions. Instead of manual input, the ™ functions of the central control element are used by memory banks as a program carrier, preferably a perforated tape programmed with the ventilation variants replaced with a tape scanner. The invention is intended below using an exemplary embodiment are explained in more detail. Show it:

Fig. 1 shows a central control element, preferably as a preprogrammed rotary selector switch and

^ Fig. 2 he switches the rotary selection in the function circuit diagram

to the control part.

As FIG. 1 shows, the central operating element 1 is a preprogrammed rotary selector switch. This one is for that common types of ventilation such as manual ventilation, spontaneous ventilation, intermittent positive pressure ventilation (IPPB) and alternating positive-negative pressure ventilation (APNB) as well as their variants such as anesthesia regressing Sxrei (NRB) Harkose-nichtrückatiiiuugsiCrei (NNRB) and without anesthesia (ON)

109841/1028 " ⁵ -

BATH ORIGINAL

designed. As Fig. 2 illustrates, the pointer twist grip 2 mechanically connected to the pneumatic pressure signal transmitter 3. This consists of a disc 4 with Up to the disk center of the radially arranged groove 5, into which an auxiliary air line 6 is guided axially to the disk 4 and the number of signal lines corresponding to the ventilation variants with its outward end when the disk is rotated 7 painted over. Its grid device (not marked) ensures an adjustment of the point from which a signal should be triggered. The auxiliary air line β is connected to the auxiliary air network, from which the entire Dreloba system is supplied with control air. Against it are the signal lines 7 via logical links of combined pneumistors with the connection points 8 of the integrated circuits dej. control (not shown) tied together.

In parallel, starting from the auxiliary air line 6 separate controls for an assistor, a deep breath, an additional circuit APND, an Oo'Düsche and a Hand control given. The individual auxiliary air branch lines 9 are provided with pneumatic disconnectors 10, durcii ede a pressure signal is triggered when switched on. In the same way, injectors are operated by means of switches switched on or off instead of the separate switch IC and 11 can be used according to requirements, and in an analogous manner

- 6 109841/1028 bath

- D -

a switch unit can be used with the rotary selector switch or "an extension of the previous signal lines 7 by one or more of the separate lines 9 is possible"

109841/1028

Claims (1)

Patent claims: 1.) Control unit for ventilators that are in their perlite technical execution a logical connection of components for all problems (Dreloba system) up / down and with the preselection of the ventilation types or their variants are carried out by means of a switch, characterized in that the switch is a central control element with a logical linkage of the integrated circuits below, wherein the logical connection by means of combined pneumistors is made. 2. Control unit according to claim 1, characterized in that that the central Beaienelement a preprogrammed rotary selector switch, a push button unit with return safety, an air pulse release clip o.a. is a switch unit. 5. Control unit according to claim 1, characterized in that that the pneumistors for education an "and" function and / or an "or" function. 4 «control unit according to claim!, Characterized in that that the logical connection of the central 3edienele: aentes via electronic resp. BATH 109841/1028 electrical circuits is made. 5. Control unit according to claim 1, characterized in that that the functions of the central control element of memory tapes as program carriers, preferably one programmed with the ventilation variants Perforated tape, in connection with a tape scanner are replaced. 10 9 8 4 1/10 2 8