GB2134202A

GB2134202A - Connection device

Info

Publication number: GB2134202A
Application number: GB08301346A
Authority: GB
Inventors: Patrick Balteau; Thomas Walter Coneys; Richard Paul Goldhaber
Original assignee: Travenol European Research and Development Center
Current assignee: Travenol European Research and Development Center
Priority date: 1983-01-18
Filing date: 1983-01-18
Publication date: 1984-08-08
Also published as: ES528835A0; WO1984002849A1; ES8500069A1; EP0133431A1; GB8301346D0

Abstract

Apparatus for removing a first connector (18) from a second connector (16) and a reconnecting the first connector (18) with a third connector (16a) by mechanical means so that the visually impared can do it, without touching critical areas where sterility should be retained. The apparatus finds particular use in the field of peritoneal dialysis where the catheter or set (12) connected to the patient must be disconnected from one container of solution (14) and reconnected to another container (15) under the most aseptic conditions possible. A platform (30) is provided having first slot means (32) for permitting controlled movement of a first retention means (22) between a first position (Figure 1), permitting disconnection between the first and second connectors (18, 16), and a second position (Figure 2), permitting connection between the first and the third connectors (18, 16a) when the first, second and third connectors (18, 16, 16a) are respectively carried in the first, second and third retention means (22, 24, 26). A first pin means (34) is carried on the first retention means (22) and is slideable in the first slot means (32). A second slot means (36) is defined in the first retention means (22) and a second pin member (38) is carried on the platform (3) so as to be slideable in the second slot means (36).

Description

SPECIFICATION Automatic connection device In peritoneal dialysis and particularly continuous ambulatory peritoneal dialysis (CAPD) there is a great need to maintain aseptic conditions during the course ofthe procedure, during which peritoneal dialysis solution is passed into the peritoneal cavity and thereafter removed from the peritoneal cavity. Typical peritoneal dialysis procedures require disconnection and reconnection of a connectorwhich terminates a set communicating with the interior ofthe peritoneal catheter with other connectors on various bags or other containers of peritoneal dialysis solution. The slightesttouch of a critical portion ofthe connector with a contaminated surface is believed to create a significant risk of peritonitis to the patient.

The problem of contamination of a connector while bags of peritoneal dialysis solution are being changed is particularly serious in the case of visually impaired patients or other patients who exhibit tremors in their hands, and the like. Many such patients have end stage renal disease, and require dialysis in order to maintain life. There is therefore a need to provide such patients, and other patients as well, with a reliable technique to provide a controlled means for disconnecting and reconnecting the various connectors in a manner which will minimize the risk of contamination, providing a reliable mechanical means to assure such contamination-free connection.

One mechanical device for accomplishing this is the Steri-Track device which has been used and which is described in an article entitled "CAPD for the Blind" from the Periodical NepthrologyNurse, March/April 1981, pp.53-54. This device is a self-contained, portable device. When doing solution bag changes, a fresh bag of dialysis solution is placed into a stationary end of a holder. The protective tab of the bag is removed, and a spike is taken from the discharge bag and fitted into the grooves of a movable plate. The patient now manipulates the sliding plate toward the bag, with the result that the spike will plunge into the port of the bag with alleged 98 percent probability.

This, however, solves only a portion ofthe problem since contamination can be picked up between the timethespikeisremovedfromthebag and inserted into the fresh bag. For example, the patient may cause the spike to brush against a contaminated surface while trying to load it into the device.

In Munsch, et al U.S. Application Serial No.416,785, filed September 101982, and entitled "Automatic Connection and Disconnection" an apparatus is provided in which a connection in a peritoneal dialysis system can be loaded into the device without breaking of the connection. Thereafter, the breaking of the connection and the making ofthe new connection can be done in a positive, mechanical manner, while the patientcan keep his hands entirely awayfrom all the connectors, so thatthe chance of accidental contamination even by a blind patient is greatly reduced.

The apparatus shown uses a pair of shaped slots into which a movable retention meansfora connectorfits, to permit its motion between a first and a second position with the connection of a connector carried therein being made with a second connector in the first position and a third connector in the second position.

In accordance with this invention, improvements are provided to such a device wherein the device is simplified, and also made capable of easy disassemblyfor cleaning and the like. Furthermore, the device ofthis invention can be usedforthe precise, mechanical connection of connectors which fittogether in screw-threaded or other rotary locking relationship.

This invention relates to apparatus for removing a first connectorfrom a second connector and reconnecting the first connector with a third connector, whch comprises first, second and third retention means for respectively carrying first, second and third connectors. Platform means are provided for carrying the first, second and third retention means in typically fixed spatial relationship with each other.

First slot means are provided to the platform means for permitting controlled movement of the first retention means along with thefirst slot means between a first position permitting disconnection between first and second connectors, and a second position permitting connection between first and third connectors, when the first, second and third connectors are respectively carried in the first, second and third retention means.

In accordance with this invention, a first pin member is carried by the first retention means and is slidable in the slot means. A second slot is defined in the first retention means, and a second stationary pin member is carried by the platform means in a position to be slidable in the second slot. Thus, the first retention means moves along a fixed positional path from the first position to the second position and back again, for the preciseconveyanceofthefirstconnectorfrom an engaging position with the second connectorto an engaging position with the third connector, in a mannerwhich can easily be done by a visually impaired person or another person suffering a disabil ity in manual dexterity, with greatly reduced risk that the connectors will be contaminated during the process.

Typically, the first retention means carries rotatable barrel means defining an aperturefor receiving afirst connector. The purpose of this is to permit rotational connection and disconnection between thefirst con nector and other connectors, specifically the second and third connectors.

The barrel means may define an axis of rotation parallel to the axis ofthe second slot of the first retention means which, in turn, istypically parallel to the axis of the first retention means itself.

It is also desirableforthe aperture of the barrel means to be proportioned and adapted to prevent relative rotation of a connector carried in it with the barrel itself, so that the barrel means can be rotated with positive rotational control ofthe connector.

Typicallythis may be accomplished by making the connector-gripping portion of the aperture of noncircular cross section and of a shape to grip the specific periphery of the desired connector, to prevent rotation. Additionally, the aperture ofthe barrel may constitute a bore extending the length thereof, plus a longitudinal slotwhich communicates between the bore and the exterior, so that the connector may be inserted laterally into the barrel means, and any tubing to which the connector is attached may also be inserted therein through the slot.

It is furtherdesirable forthe second stationary pin member carried on the platform means to define an elongated head overlying the second slot ofthe first retention means, to lockthe first retention means onto the platform means. However, the elongated head may be proportioned to permit removal of the first retention meansfromthe platform meanswhen the head is in a position parallel to the second slot. Thus the first retention means may be removable from the platform means, with the elongated head passing through the second slotforseparation ofthe components. Thus, the individual components of the platform means and first retention means can be separately cleaned between uses and easily reassembled.

To facilitate the above, the first slot means may define a hooked section spaced from sections of the first slot which permit the movement between the first and second position discussed above. The hooked section permits movement ofthe first retention means into the position of parallel relation with the elongated head, permitting separation ofthe components.

The first slot means also may define a pair of angularly related straight sections, connected by an arcuate section, to permit movement of the first retention means between the first and second positions.

Referring to the drawings, Figure lisa perspective view of one embodiment of the apparatus of this invention with the first retention means being shown in its first position.

Figure 2 is a perspective view of the apparatus of Figure 1 with the first retention means shown in a position intermediate between the first and second positions, with a portion ofthe set held therein broken away.

Figure 3 is a plan view of the apparatus of Figure 1 showing the first retention means in a position advanced from that of Figure 2 toward its second sliding position, with the first sliding position being shown in phantom.

; Fig ure 4 is a plan view ofthe apparatus ofthe previous drawings showing its mode of disassembly.

Figure 5 is a sectional viewtaken along line 5-5 of Figure 3.

Figure 6 is a sectional viewtaken along line 6-6 of Figure 3.

Figure 7 is a sectional viewtaken along line 7-7 of Figure 3.

Referring to the drawings, apparatus 10 ofthis invention is for providing reliable mechanical means for removing a connection between a conventional CAPD set 12, for example, which connects to a peritoneal catheter of a patient at one end, and a first dialysis solution bag 14,andforproviding reliable mechanical connection between set 12 and a second peritoneal dialysis solution bag 15. The specific design of connectors utilized in the bags and sets for connection and disconnection may be in accordance with U.S. Patent No.4,294,250, for example. Bag 15 may be sealed with a break-away member20 for access to the contents ofthe bag in accordance with U.S. Patent No.4,340,049, for example.

As shown, the apparatus comprises a first retention means 22, typically for holding connector 18 of set 12.

Second and third retention member 24,26 define slots 28, each of which are proportioned to hold a connector 16, 1 6a of one ofthe dialysis solution bags 14, 1 Slots 28 may be oftrapezoidal shape in plan view (figs.3 and 4), so that narrow rear ends 29 of slots 28 can grip the connector held therein, cooperating with ring 31 of a connector (fig. .1) to limit its advancement in slot 28.

Each of retention means 22,24,26 are carried on platform 30, which may be a plastic plate of the like.

Platform 30, in turn, defines a first slot 32 ofthe shape indicated in Figure4,forpermitting controlled movement offirst retention means 22 along first slot 32 between a first position permitting disconnection between first and second connectors 16,18, as shown in Figure 1, and a second position permitting connection between first and third connectors 18, 16a, resulting from advancement of first retention means 22 to a position where the two connectors can be locked together i.e. approximately that shown in Figure 3.

Pin member34 is carried byfirst retention means 22 and projects in sliding relationship into a slot 32, which can extend completelythrough platform 30 for ease of cleaning. Thus the position ofthefront end of first retention means 22 is controlled by the position of pin member 34 in slot32.

First retention means 22 also defines a second slot 36,typicallya straightslot, into which projects stationary pin 38, immovable affixed to platform means 30. Stationary pin 38 carries an elongated head 40 which, in most positions of member22 in slot32, retains member 22 in sliding, retained relationship with platform 30. Accordingly, first retention means 22 is retained on platform 30 due to its double retention at two positions, one bythe action of pin 38 in slot 36, and the other by the action of pin 34 in slot32. This permits first retention member 22 to be precisely aligned in its first position as shown in Figure 1, so that connectors 16,18 can be disconnected or connected together in that position.

First retention means 22 can then slide along the precisely defined continuum of positions to the second position in which connector 18 can lockwith connector 16a, with pin 34 moving from one end 42 of slot 32 (Figure 3) almostto intermediate corner 44 of slot 32, at which time the second position is achieved.

During this path of motion, first retention means 22 is held in pivoting relationship with pin 38 in slot 36 for precise, angular guidance of member 22 as its pin 34 slides along slot32, being retained in locked relation with platform 30 by elongated head 40.

Accordingly, even a blind person can simply grasp handle 45 of member 22, to reliably move a connector 18 carried therein between the first and second positions, for unlocking connector 18 from connector 16 and then relocking connector 18 with another connector 16a.

First retention means 22 carries a block 46 defining a slot in which rotatable barrel means 48 is carried.

Barrel means 48, in turn, defines an aperture 50, plus an added slot 52 extending its entire length, for receiving and retaining a connector 18 as well as the length of set tubing 12to which the connector is attached. Set 12 may be placed into the rotating barrel means while connector 18 is carried within aperture 50. See Figure 7, for example.

As shown, aperture 50 may be proportioned to prevent relative rotation of a connector 18 held therein by being, for example, of square or rectangular cross-section, so that rotation of barrel member48 can cause rotation ofthe connector. This permits locking ofthe screw threaded connectors together with ease, simply by grasping handle 54 and rotating while engaging the respective connector 16 (for unlocking) or 16a (for locking). Barrel member 48 may be held in snapfit relation in the slot 47 of post 46, and may have an axis of rotation parallel to the axis of slot 36.

Bolts 53 hold post 46 onto member 22, while bolts 55 may retain each of second and third retention means 24,26 onto platform member 30.

As shown particularly in Figure 4, slot 32 may comprise a pair of angularly related straight sections 56,58, connected by an arcuate section 60 to permit movement of the first retention means 22 between the first and second positions.

Additionally, slot 32 defines a hooked section 62 which is spaced from sections of slot 32 which permit movement between the first and second positions.

This hooked section 62 may be present to permit movement offirst retention means 22 into a position where second slot 36 is essentially parallel to the long axis of elongated head 40. Elongated head 40 may then be proportioned so that member 22 may be lifted off in that position, as shown in Figure 4, for cleaning and the like, with pin 34 simply lifting out of slot 32 in that position.

After cleaning, member 22 may be replaced, with head 40 of pin 38 passing through slot 36, and pin 34 passing into hooked section 62 of slot 32. Thereafter, member 22 may be moved again so that pin 34 passes into sections 56,58 and 60 of slot 32, in which position head 40 is in angular relation to slot 36, thus locking first retention means 22 onto platform member 30.

Accordingly, in use, a CAPD patientwho is blind or physically debilitated may have a transfer set 12 connected to his peritoneal catheter, terminating in a connector 18, which, in turn, is connected to a connector 16 of an empty bag 14.

The patient has the peritoneal dialysis solution in his peritoneal cavity, and he seeks to make an exchange.

He simply placesthe connected bag and connectors into the device ofthis invention as shown in Figure 1, which is the desired first position. He then places a fresh bag 15 of peritoneal dialysis solution into third retention means 26 as shown, removing the protective cover of connector 16a. The patient then rotates handle 54to disconnectthethreaded connecton between connectors 16 and 18. He does not touch either of connectors 16 or 18. The patientthen grasps handle 45, and pulls first retention means 22 to cause pin 34to slide along slot 32, pivoting through arcuate section 60, with an intermediate stage shown in Figure 2, until pin 34 reaches approximately angle 44 of slot 32. At this point, connector 18 is in engagement with connector 1 6a. The patient then rotates handle 54 again, touching nothing else except perhaps handle 45, to cause the two connectors to enter into tight, screw-threaded relationship. The connection process is thus completed, with the patent touching only handles 45 and 54 as the disconnection and reconnection is made.

Thereafter, an outer protector may be applied to the joined connectors 16a, of the type shown in U.S.

Patent No.4,340,052, to further protect the connection.

The above has been offered for illustrative purposes only, and is not intended to limit the scope ofthis present invention, which is as defined in the claims below.

Claims

1. In apparatus for removing a first connector from a second connector and reconnecting the first connectorwith athird connector, which comprises: first, second, and third retention means for respectively carrying first, second, and third connectors; platform means for carrying said first, second, and third retention means; the first slot means on said platform means for permitting controlled movement of said first retention means along said first slot means between a first position permitting disconnection between first and second connectors and a second position permitting connection between first and third connectors, when said first, second, and third connectors are respectively carried in the first, second, and third retention means, the improvement comprising, in combination: afirstpin member carried bythefirst retention means and slideable in said first slot means, a second slot defined in said first retention means, and a second, stationary pin member carried on said platform means and slideable in said second slot.

2. The apparatus of claim 1 in which said first retention means carries rotatable barrel means defin ing an aperture foor receiving said first connector to permit rotational connection and disconnection between said first connector and other connectors.

3. The apparatus of claim 2 in which said barrel means defines an axis of rotation parallel to the axis of said second slot.

4. The apparatus of Claim 2 in which the aperture of said rotatable barrel means is proportional to prevent relative rotation of a connector held therein with respect to said barrel means, whereby rotation of said barrel means can cause rotation of said connector.

5. The apparatus of claim 1 in which said second, stationary pin member defines an elongated head overlying said second slot and permitting removal of said first retention means from the platform means when said head is parallel to said second slot.

6. The apparatus of claim Sin which said first slot means defines a hooked section spaced from sections ofthefirstslotwhich permit said movement between thefirstandsecond positions, said hooked section permitting movement of the first retention means into position permitting said removal.

7. The apparatus of claim 1 in which said first slot means defines a pair ofangularly related straight sections connected by an arcuate section to permit movement of the first retention means between said first and second positions.

8. In apparatusforremoving afirstconnectorfrom a second connector and reconnecting a first connector with the third connector, which comprises first, second and third retention means for respectively carrying said first, second and third connectors; platform meansforcarrying said first, second and third retention means; first slot means on said platform means for permitting controlled movement of said first retention means along said first slot means between the first position permitting disconnection between first and third connectors, and a second position permitting connection between first and third connectors, when said first, second and third connectors are respectively carried in the first, second and third retention means, the improvement comprising, in combination:: Afirst pin member carried by the first retention means and slideable in said slot means, a second slot defined in said first retention means, and a second stationary pin member carried on said platform means and slideable in said second slot, said first retention means carrying rotatable barrel means defining an aperturefor receiving said first connector to permit rotational connection and disconnection between said first connector and other connectors, said second stationary pin member defining an elongated head overlying said second slot and permitting removal of said first retention means from the platform means when said head is parallel to the second slot.

9. The apparatus of Claim 8 in which said first slot means defines a hooked section spaced from sections of the first slot which permit said movement between the first and second positions, said hooked section permitting movement of the first retention means into position permitting said removal.

10. The apparatus of Claim 9 in which said first slot means defines a pair of angularly related straight sections connected by an arcuate section to permit movement ofthefirst retention means between said first and second positions.

11. The apparatus of Claim 10 in which said barrel means defines an axis of rotation parallel to the axis of said second slot.

12. TheapparatusofClaim 11 in which the aperture of said rotatable barrel means is proportioned to prevent relative rotation of a connector heldthereinwith respect to said barrel means, whereby rotation of said barrel means can cause rotation of said connection.

13. In apparatus for removing a first connector from a second connector and reconnecting the first connectorwith athird connector, which comprises: first, second andthird retention meansforrespective- ly carrying said first, second and third connectors; platform means carrying said first, second and third retention means; first slot means on said platform means permitting controlled movement of said first retention means along said first slot means between a first position permitting disconnection between first and second connectors and the second position permitting connection between first and third connectors, when said first, second and third connectors are respectively carried in the first, second and third retention means, the improvement comprising, in combination, rotatable barrel means carried by said first retention means and defining an aperture for receiving said first connector, to permit rotational connection and disconnection between said first connector and other connectors, said aperture defining a noncircularconfigurationto receive said first connectorinfixed, nonrotatable relation relative to said barrel means, whereby said barrel means can firmly rotate said connector for positive rotational connection and disconnection.

14. TheapparatusofClaim 13inwhichsaid aperture includes a bore extending the length of said barrel means, and a longitudinal slot providing communication between the bore and the exterior, whereby said first connectors and tubes which they carry maybe inserted into said barrel meansthrough said longitudinal slot.

15. The apparatus of Claim 14 in which said barrel means defines an axis of rotation parallel to the axis of said first retention means.