DE1692051A1 - Method and device for sterilizing, in particular, surgical instruments - Google Patents

Description

P 1 + GmH

Applicant: Richard Esdaile Pickstoiie

j? 6 Avon Trading Estate, London W. 14.

experienced and Vorriehfcnmg sum sterilization in particular of surgical instruments

Surgical instruments to be sterilized are known in an oven above 160 ° C for about an hour heat. Ea gives a faster working sterilization process a, in which the instruments are immersed in hot oil be, but the removal of residual oil from the instruments is difficult, which is why this method as unsuitable 31p; is seen.

The invention creates an experience for the sterilization of surgical instruments or devices, in particular, in which the object to be sterilized is immersed in a boiling inert liquid or its saturated steam, the liquid having a boiling point of about 160-190 ° C. DaDe i the instrument is immersed until it has reached the temperature of the liquid Ia ¹ cm. of the saturated steam and then in a room above the steam zone of the boiling liquid is placed in the oven and left there until the liquid still remains on the instrument Intrinsic heat of the

^ß AD ORIGINAL

109829/1491

Device has evaporated.

The invention can be carried out in a sterilization device which initially has a tank for holding an inert liquid with a boiling point above 160.degree. There is provided a heater for the liquid in order to heat it in the tank and in α to generate a Dampfζone the tank and spaced from the liquid in the tank a cooling device is provided to an OE

above
correct vapor layer / liquid to be maintained.

There is a holder for the instruments to be sterilized between a first position in which the objects to be sterilized are in the steam zone or in the liquid are located and a second position; traversing & r., in which second position the to be sterilized Objects are no longer in the liquid or vapor layer. The arrangement is made in such a way that

that the devices are held by the holder in the liquid or in the vapor zone until they are tempered au r have adopted and then the bracket is in the move to the second position in which the au liquid adhering to sterilizing objects Removal of heat from the objects evaporates.

A non-toxic liquid is found as the liquid high vapor density and low viscosity and surface tension at boiling point use. For this purpose <>; e-

; ■:, «" · - "10 * 828/1491 bad oma» «.

suitable liquids are fluorocarbon compounds; h »Hydrocarbons or hydrocarbon derivatives whose hydrogen has been completely replaced by fluorine. For example, fully fluorinated tributylamine or alkyldecalin can be used. These substances are generally marketed under the designation Fc followed by a number; ¹¹ Fc 43 "has, for example, a boiling point between 169 and 174 ° C. The sterilizing liquid can be a saturated organic compound in chain form or ring form, in which all hydrogen atoms have been replaced by fluorine. Amine groups can also occur if these have been reacted with fluorine, since these groups then lose their basic properties.

The method according to the invention can be carried out in an isolated manner Cooking tank carried out in its upper area a cooled zone which is at least as high as the isolated part. The liquid is left as it is boil strongly that the one above the liquid Tree in the isolated area is filled with steam, but with is not boiled so vigorously that the steam rises too high into the cooled zone or that liquid with the steam is pulled up. The instruments held or stopped on a rail or the like are filled with steam Room lowered and quickly to the boiling point the liquid is heated. One should the; Items to be sterilized for one too, of the size; the instruments dependent Leave time for safe sterilization in the steam »

109828/1491

Looking at. the devices are placed in the cooling zone of the tank lifted up where the one previously recorded by the 'devices Heat completely to these adhering liquid particles and quickly evaporated afterwards, the instruments can be removed from the system hot and sterilized.

Further advantages and details of the invention result from the following description of a device for performing the method according to the invention with reference to FIG Drawing. In the drawing show:

Fig. 1 shows the device schematically in vertical section with raised holder for the items to be sterilized; and

FIG. 2 shows the arrangement according to FIG. 1 with the holder lowered for the items to be sterilized.

The device initially has an upstanding elongated steam tank 10, which consists of an upper section 11 and a lower section 12. The lower part of the lower tank section 12 is covered by an insulating jacket Ij? isolated. A heating device Ik is provided in the area of the floor and the parts of the side walls adjoining it. The lowermost part of the tank 10 receives the sterilizing liquid 15 in the form of a layer which, for. B. of fully fluorinated tributylamine with a boiling point between IF9 and IT ¹ I- ⁰ C is formed.

109828 / U91 _ BADOR ₁ G ₁ NAL

The upper part of the lower tank section 12 has at the Outer surface a group of port sets serving for cooling or fins 16, whereby a cooling zone is created at the upper part of the lower tank section 12, which is between them and the liquid at the bottom of the tank defines a sterilization zone.

The upper tank section 11 is provided with a funnel-shaped extension 17 over the upper part of the lower tank section 12. The pull-like section YJ has on its lower edge a circumferential flange 18 which is connected to a flange 19 on the upper edge of the lower tank section 12 in a vapor-tight manner. Above the funnel-shaped section VJ ^T, the tank 10 has an opening 20 through which the interior of the tank is accessible and which is closed with a vapor-tight door 21. The tank space 10 also has two spaced guides 22 from the upper part of the sterilization zone in the lower tank section 12, which lead to. to open now 20 in the upper tank section 11. The guides 22 are attached to the upper tank section 11 and extend downward through the cooling zone determined by the cooling surfaces 16 into the lower tank section. The guides 22 carry an instrument holder 2j5> which receives the Gxi instruments 2-1 to be sterilized. The bracket 22

/ 22

is slidably mounted in the vertical on the rails and is held by a chain or the like / on which it is held by means of the

109828 / U91

Drive with gear 26 in the tank "can be lowered.

The upper tank section 11 takes in a space 25 next the door 21, the drive 2β for raising and lowering the holder 23 into or out of the steam chamber 27, the exists in the sterilization zone between the surface of the boiling liquid 15 and the lower part of the cooling zone, which latter is determined by the cooling surfaces 16,

The lower tank section 12 has a thermostat 28 in the upper part of the sterilization zone which protrudes into the steam layer 27. The thermostat 28 is coupled to the control and drive device 2.6 and prevents the holder 23 from being lifted out of the sterilization zone if there is insufficient steam or if the correct temperature does not exist there.

The drive and control device 2o has an adjustment circuit which controls the time during which the instruments 2) are in the steam-filled section 2, ". Sufficient for small instruments, such as 3. Forceps and scalpels . a Steriliserzeit from 1 to h minutes the drive and control device 26 has AUON corresponding advertisements with a lamp, which indicates when the sterilization is complete and the light is off, Vienne for some reason the au sterilized nlo ': t

have been in the steam room 27 long enough, or when the steam level is reached has fallen in accordance with the display of the thermostat 28 or if there is a Sailer in the power supply of the device occurs. A switch is also provided which, after closing the Tm * 21, switches the delay circuit back on switches back to the starting position.

When starting up, the bracket 23 is initially at the top the guides 22 * Then the instruments are hung on the holder 23 through the opening 20. the The sterilization time is determined by the appropriate setting means the device is selected and when the door is closed, the drive device 2β is put into operation via a switch, whereby the bracket 23 on the guides 22 in the sterilization zone 27 is lowered »the holder 23 and instruments 24 are then left in the steam chamber 27, until the instruments measure the temperature of the steam in room 27. Have accepted. At the end of the sterilization process, the Control and drive device 26 the holder 23 back on the guides 22 upwards into the position behind the door 21. There, the heat stored in the instruments 24 is used to vaporize the liquid still on the instruments, after which the instruments are cleanly sterilized and still hot can be removed from the opening 20.

Claims'

109828/1491 wk

Claims (22)

F 1 + Cnili P A TEMO? EXPECTATIONS 1, method for sterilizing in particular medical or surgical devices and instruments, geke η n = z ei ch η 'et by the following process steps; Introduction of the devices in eine'kochende, inert liquid or in the saturated steam, whereby the boiling liquid has a boiling point of Loo - have adopted has 19O ^Q C until the instruments, the temperature of the liquid or its vapor; Lift the devices into a zone above the steam and the liquid and leave the devices in this zone until liquid still adhering to the devices has evaporated due to their heat. 2. The method according to claim 1, characterized in that g e k e η η draws that the. inert liquid non-toxic 1st, a high vapor density and a low one at the boiling point Viscosity and has a low surface tension. 3. The method according to claim 1 or 2, characterized in that the liquid is a fluorocarbon compound, "'" ".- ■ 4. The method according to claim 3, characterized in that g e k e η η that the liquid is fully fluorinated tributylamine or alkyldecalin, ■., ' ^: 109121/1491 bad original 5. The method according to one or more of the preceding Claims, characterized in that the liquid has a boiling point between 169 and 174 ° C. 6. The method according to claim 1 or 2, characterized in that the liquid is saturated organic compound with straight molecular chains, branched Moleldilketten or rings, in which all hydrogen atoms are replaced by fluorine atoms. 7. The method according to claim 6, characterized in that g e k e η η draws that the organic compound with is substituted for some or more fluorinated amine groups. 8. The method according to one or more of the preceding · claims, characterized in that the Steam is present in an insulated boiling vessel and that a cooling zone is arranged above this steam zone, which has at least the same height as the isolated part of the system. 9. The method according to claim 8, characterized in that g, e k e η η ,. that the liquid is constantly so strong boils ,. that the isolated. Liquid; ORfGINAL, is filled with steam, whereby the steam zone is not too far into the cooling zone and no liquid with the rising steam is carried away. 10. The method according to claim 8 or 9, characterized -geke η η is characterized in that the devices to be sterilized are suspended from a bracket. <is bar, and that the instruments are approximately at the boiling point of the liquid and left in the steam for a sterilization time, and after this time has elapsed The instruments are then lifted into the cooling zone of the tank, where after evaporation the liquid particles still adhering to them Due to the intrinsic heat of the instruments, they can be removed hot, clean and sterile « 11. Device for sterilizing in particular medical or surgical devices with a steam tank ™ to hold an inert boiling point above 160 ° C Liquid, a heater for the liquid used for separation a steam zone above the liquid, a cooling device above the steam zone and a holder for the items to be sterilized Objects that come from a first position in which the objects are in the liquid or in the vapor can be moved into a second position in which the objects are kept outside the steam ζ on ©, no often liquid adhering to ilines, thereby 109828 / U91 bad original steams that the objects 'beforehand' to the temperature the liquid or steam have been heated> 12. The device according to claim11, characterized in that the heated part of the steam tank is insulated and that a cooling zone is arranged above the insulated part, in which steam condenses, whereby the steam zone is limited at the top. Ip »Device according to claim 11 or 12, g e k e η η draws by an upstanding tank with an upper and a lower section, the lower section being the insulation (IJ) and a heating device (14) for the liquid aufxtfeist. 14, .Device according to claim ij5> characterized in that on the upper part of the lower tank section outside cooling surfaces (l6) are arranged. 15, device according to claim. Ij5 or l4, thereby characterized in that to the cooling section a triplet-shaped section (17) connects to the top, in its upper area a door (21) for loading the Has device with the objects to be sterilized (24). 1 Q ^{ft 28/14} t 1 ßÄD 16. The device according to one or more of the address 13 to I5> characterized ge Ic e η η ζ η et eigh that sum from the upper portion of the lower guides (22)., Which are arranged with mutual spacing and the transport of the articles (24 ) serve between the two positions. 17. ■ Device according to spoke l6, characterized by g e Ic e η "η draws that the guides (22) in the upper tank section (11) are stored or held and protrude downward through the cooling zone (16). 18. Apparatus according to claim l6 or 17 , characterized g e Ic e η η ζ e i c h η e t that the guides (22) a holder (2 ^) slidable in the vertical direction store, which receives the items to be sterilized. 19. The device according to claim 18, characterized in that the holder (23) via a chain can be raised or lowered. 20. The apparatus according to claim 11 characterized bis- 19y ₃ that ISTJ disposed in the sterilizing zone, a thermostat (28) of the steam zone (27) 1 0 9 8 2 8 / U 9 1 bad original stands in and so with; the drive for the bracket (23) that the bracket is only in ± a? e upper Position surlieMcejort if the common conditions prevail. 21. The device according to one or more of claims 11 to 20 ₃ ge characterizes t by a motor drive -for moving the bracket (23>) between the two positions, the motor being assigned a delay circuit, whose delay time is selectable., wherein the delay time determines the dwell time of the holder ^) in the sterilization zone (27). 22. The device of claims to 2ij, characterized by a door (21) in the upper region of the tank ₃ which in turn open a Mikroöcüalter at or sleeping in the sense betatig t ₃ da'B the drive for performing a new sterilizing reset after one or will. BAD ORfQINAL 109828/1491 -. Blank page