FR2871702A1 - Cassette for irrigation and aspiration machine, has T-shaped guide according to head of T to protect elbows of irrigation and aspiration tubes and according to length of T body in slot guiding tubes in output direction - Google Patents

Abstract

The cassette has a support with a T-shaped guide according to the head of T to protect elbows (9i, 9a) of irrigation and aspiration tubes (1i, 1a) and according to the length of the T body in a slot (19) guiding the tubes in the output direction (S). The guide extends between inlet plugs (3i, 3a) to form an irrigation (11i) or aspiration (11a) pumping area on both sides of the slot between each plug and the head of T. An independent claim is also included for an irrigation and aspiration machine utilized for endoscopy.

Description

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  CASSETTE AND IRRIGATION OR SUCTION MACHINE USED IN

ENDOSCOPY

  TECHNICAL FIELD The invention relates to a cassette intended to fit into an irrigation or aspiration machine used in endoscopy.

  The invention relates more particularly to a cassette comprising an irrigation pipe or a suction pipe and a support provided with one or two inlet ports and one or two outlets, the one or more two tubes forming a bend to engage with the one or two inlets and outlets in a flow direction respectively entering and exiting and forming a pumping segment irrigation or suction in the direction of the incoming traffic.

  STATE OF THE ART A cassette of this type is known from US 5460490.

  According to this document, the pumping segment is provided on the irrigation pipe. The suction tubing does not include a pumping segment and must be connected to a vacuum source to create the suction. This arrangement has the disadvantage of choosing for the pumping segment, the elbow formed by the irrigation pipe relative to the support. Therefore, the elbow remains accessible and is not protected by the support against a risk of tearing of the irrigation tubing due to improper handling of the cassette.

  A cassette providing better protection of the irrigation and suction pipes is known from US 5628731. According to this document, the support has a base and a cover closing on the base to protect the two pipes. However, it is necessary to open lights in the base and in the cover to clear the pumping segment formed on the irrigation pipe.

  In addition, the irrigation and suction pipes are arranged in nesting one in the other on the same plane of the base of the support. This arrangement tends to impose a much larger footprint of the cassette that a second suction pipe, generally desired by the surgeon user of the cassette, must be engaged on the support.

  The object of the invention is to modify a cassette according to that just described above to ensure good protection of the irrigation and suction pipes while reducing the number of parts necessary for the support for the tubing engagement and allowing to engage a derivative suction tubing without increasing the overall size of the cassette.

  Disclosure of the invention For this purpose, the invention relates to a cassette intended to be inserted in an irrigation or aspiration machine used in endoscopy comprising an irrigation tube or a suction tube and a support provided with one or two input sockets and one or two output sockets, the one or both pipes forming a bend to engage with the one or both input and output sockets in a direction of respectively incoming and outgoing circulation and forming an irrigation or suction pumping segment along the incoming direction of circulation, characterized in that the support comprises a T-shaped guide shaped to the head of the T to protect the elbow of each tubing and shaped along the body of the T in a housing guiding the one or both pipes in the outgoing direction of circulation, the T-guide extending between the one or two inlet ports to form the pumping segment irrigation or d suction on both sides the housing between each input socket and the T-head. The T-guide makes it possible to protect the one or both pipes in both incoming and outgoing traffic directions without it being necessary to provide a cover for the support. The housing guides the one or both pipes, allowing to superpose them relative to each other to reduce the size of the cassette compared to an arrangement of two pipes in the same plane. By extending between the two tubing inlet jacks, the T-guide furthermore makes it possible to form a pumping segment for each of the two irrigation and suction tubes.

Brief description of the drawings

  Other advantages of the invention will appear on reading the description of an embodiment illustrated hereinafter by the drawings.

  Figure 1 shows in perspective a cassette according to the invention. Figure 2 shows the cassette in front view. Figure 3 shows the cassette in section A-A. Figure 4 shows the casette following a section B-B.

  Figure 5 shows the casette according to a view from below. Figure 6 shows the cassette in a C-C section. Figure 7 shows the casette following a D-D cut.

  Figure 8 shows another embodiment of a cassette according to the invention.

  Figure 9 shows the cassette of Figure 8 in a bottom view.

  Figure 10 shows the cassette of Figure 8 in a section F-F.

  FIG. 11 shows an exemplary embodiment of a cassette according to FIG. 8, in which the suction function has been removed to leave only the irrigation function.

  Figure 12 shows the cassette of Figure 11 in a view from below.

  Figure 13 shows in perspective an irrigation and suction machine according to the invention in which is inserted a cassette according to the invention.

  Figure 14 shows a top view of a carriage and a cassette holder of the machine illustrated in Figure 13.

  Figure 15 is a side view of Figure 14.

  FIG. 16 is a view along the section H-H of FIG. 14.

  Figure 17 shows more particularly the carriage of Figure 13.

  Figure 18 shows more particularly the cassette holder of Figure 13.

Table 1

  1 i, 1 a Intake Manifold 3i, 3a Intake Manifolds Support 7i, 7a Exit Sockets 9i, 9a Elbows 10i, 1a Tubular Irrigation Parts, Suction Pump Pumping Segment irrigation, suction 13 T-guide 14 Protective cover 15i, 15a Input tips 17 Rounded 19 Housing 21 Enclosure 23i, 23a Input channels Third input channel 26 End 27 Half-disc media 28 Channel 29i, 29a Exit channels 31 Chamber 33.35 Additional suction pipes 36 Bottom wall 37.39 Complementary irrigation pipes 41 Complementary suction pipe 43 Chamber Bottom wall 47 Pressure sockets 48 Elastomer part 49 Pressure lines 51i, 51a Peristaltic pump for irrigation, suction 53i, 53a Clogs 54i, 54a Wheels 55i, 55a Rollers 61 Chassis 62 Compression springs 63 Trolley 64 Stop Cassette holder 66 Position sensor 67a, 69a Valves 68 Sensors 71 Third Shutter 73 MB lock yen Stopper 77 Recognition fingers 79 Centering means 83 Slides Linear actuator 86 Rod 87 Slides 88 Position sensors 89 Slides Position sensors 91 Springs 93 Slides 94 Linear actuators Teats 96 Linear actuator Mode (s) of realization of the invention Referring to FIGS. 1 to 7, a cassette for insertion into an irrigation and aspiration machine used in endoscopy comprises an irrigation tubing 1i, a suction tubing 1a and a support 5 provided with two input jacks 3i, 3a and two output jacks 7i, 7a. The two pipes both form a bend 9i, 9a to engage with the two inlet and outlet ports in a flow direction respectively entering E and outgoing S and form one or the other an irrigation pumping segment 11i or suction 11a according to the incoming direction E of circulation.

  According to the invention, the support 5 comprises a T-shaped guide 13 shaped to the head of the T to protect the bend 9i, 9a of each tubing 1 i, 1 a and shaped along the body of the T in a housing 19 guiding the two superposed pipes one li relative to the other the following the direction of outgoing circulation S. In the example shown in Figures 1 to 7, the head of the T comprises a protective cover 14 and forms a double rounded 17 to guide the two elbows 9i, 9a of each tubing.

  In the example of FIG. 8, the head of the T further comprises a protective cover 14 but the elbows 9i, 9a are formed by tubular pieces 10i, 10a made of a flexible plastic material and inserted between two portions of each tubing irrigation and aspiration.

  The T-guide 13 extends between the two input sockets 3i, 3a to form the irrigation pump segment Ili or suction 11a on either side of the housing 19 between each input socket 3i. , 3a and the T-head. The T-guide 13 is fixed to a housing 21 integrated in the support 5 and provided with two inlet channels 23i, 23a open at an inlet end 15i, 15a and opening at an opposite end. by the input jacks 3i, 3a to ensure communication with the two tubes 1 i, 1 a according to the incoming direction of movement E. The case 21 is provided with a third input channel 25 open at one end 26 and disposed in branch with respect to the inlet channel 23a communicating with the suction pipe 1a to open, at an opposite end, the inlet inlet 3a ensuring communication with the suction pipe la.

  The inlet channel 23a communicating with the suction pipe 1a and the third bypass inlet channel 25 open at the end opposite the inlet port 3a providing communication with the suction pipe. 1a, in a chamber 31 integrated in the housing and receiving two complementary suction pipes 33,35 engaging with these two channels 23a, 25 being disposed at a distance from a bottom wall 36 of the chamber 31 to be compressed against this bottom wall 36 in a position of obstruction of this inlet channel 23a communicating with the suction pipe 1a or this third inlet channel 25.

  The housing 21 is provided with two outlet channels 29i, 29a open at an outlet end and opening at an opposite end through the outlet outlets 7i, 7a to ensure communication with the two pipes 1 i, 1 a in the direction of outflow S. The outlet channels 29i, 29a are carried by half-disk-like supports 27 extending in a plane perpendicular to a plane of the housing to be raised relative to the inlet channels 23i, 23a, 25 .

  The housing 21 is provided with a communication channel 28 between the outlet channel 29i communicating with the irrigation pipe li and the inlet channel 23a communicating with the suction pipe or the third inlet channel 25 mounted in derivation with respect to the latter.

  The communication path 28 is provided by a pipe disposed in a chamber 43 integrated in the housing 21 and at a distance from a bottom wall 45 of this chamber to be pressed against this bottom wall in a position of obstruction of this channel. communication.

  In the example illustrated in FIGS. 1 to 7, the housing 21 incorporates one or two pressure taps 47 formed of ducts for the passage of air coming from pressure lines 49 connected to a complementary irrigation pipe 39 by the intermediate of a membrane pressure sensor.

  In the example illustrated in FIG. 9, the housing 21 is designed to receive an elastomer piece 48 forming in one piece, the two pressure taps 47 and the ducts for the passage of air coming from the pressure lines 49 .

  In the example illustrated in FIGS. 11 and 12, were removed with respect to the embodiment illustrated in FIGS. 8 to 10, the intake pipe 1a, the inlet port 3a and the pumping segment suction 11 a. In the housing 21, the suction channel 23a, the outlet channel 29a and the complementary suction pipes 33, 35 and 41 have also been removed. In this embodiment, the cassette according to the invention makes it possible to realize that irrigation and is particularly suitable for use in endoscopy for diagnostic purposes.

  The invention extends to an irrigation and aspiration cassette machine used in endoscopy.

  With reference to FIGS. 13 to 18, the machine comprises a peristaltic irrigation pump 51i with a shoe 53i and a wheel 54i with rollers 55i mounted in correspondence, one 53i on a frame 61 and the other 54i on a mobile carriage 63 along sliding rails 83 fixed to the frame 61 to extend in a translation direction T. A linear actuator 85 controls the translation of the carriage 63 between a rest position by loosening the shoe 53i relative to the rollers 55i and a pumping position by tightening the shoe 53i relative to the rollers 55i. The machine also comprises a cassette holder 65 mounted on the frame 61 to extend in a plane P perpendicular to the translation direction T and passing between the shoe 53i and the wheel 54i roller 55i of the irrigation pump 51i.

  According to the invention, the machine comprises a peristaltic suction pump 51a with shoe 53a and wheel 54a with rollers 55a mounted in correspondence, one 53a on the frame 61 and the other 54a on the carriage 63 to loosen or tighten said shoe 53a with respect to said rollers 55a in the direction of translation T during the loosening or tightening of the shoe 53i relative to the rollers 55i of the peristaltic irrigation pump 51i between the rest position and the pumping position, the plane P perpendicular to the translation direction T also passing between the shoe 53a and the roller wheel 54a 55a of the suction pump.

  The arrangement of the cassette holder 65 in a plane perpendicular to the translation direction T of the mobile carriage 63 makes it possible to dispose both the irrigation pump segment 11i and the suction pump segment 11a of a cassette according to the invention between the shoes 53i, 53a and the rollers 55i, 55a respectively of the peristaltic irrigation pump 51i and the peristaltic suction pump 51a. The cassette according to the invention is introduced into the cassette holder 65 when the shoes are loosened with respect to the rollers in the rest position so that the irrigation pump 11 and suction 11a segments are then rolled between them. hooves and pebbles in the pumping position.

  Preferably, the cassette holder 65 is movably mounted relative to the frame 61 to be driven in displacement by the carriage 63 when the latter is moved from the rest position to the pumping position. The cassette holder 65 is moved along slideways 87 fixed to the frame 61 parallel to the translation direction T. Advantageously, the shoes 53i, 53a of the peristaltic irrigation pumps 51i and suction 51a are movably mounted by relative to the frame 65 along slides 89 extending parallel to the direction of translation T. The displacement of the shoes 53i, 53a is performed against the compression of springs 91 arranged around the slideways 89 to adjust a rolling pressure between the hooves 53i, 53a and the rollers 55i, 55a when the carriage 63 has moved into the pumping position.

  To facilitate the introduction or removal of a cassette according to the invention in the irrigation and suction machine, the cassette holder 65 is movably mounted along slides 93 fixed to the frame 61 to be moved parallel to the perpendicular plane P to the translation direction T. The movement of the cassette holder 65 is controlled by a linear actuator between a cassette insertion position where the cassette holder 65 has approached the shoes and roller wheels of the irrigation pumps and suction and a cassette ejection position where the cassette holder 65 has moved away from said shoes and said roller wheels.

  The cassette irrigation and suction machine further comprises a centering means 79 mounted on the carriage 63 to be moved with the carriage 63 in the translation direction T from the rest position to the pumping position and after the cassette holder 65 has moved closer to the shoes 53i, 53a and wheels 54i, 54a with rollers of the two irrigation and suction pumps in the cassette insertion position.

  Industrial application The support 5 of a cassette according to the invention as well as the T-guide 13 with the protective cover 14 at the head of the T and the housing 21 along the body of the T, the housing integrated in the support 21 provided with input channels 23i, 23a, the third input channel 25, the input jacks 3i, 3a, the output jacks 7i, 7a and the supports 27 are in one piece preferably molded by plastic injection molding .

  The use of the cassette and the irrigation and suction machine according to the invention is carried out as follows. The cassette is inserted by hand into the cassette holder 65 until a locking means 73 pivotally mounted with respect to the cassette holder 65 comes to lock the cassette holder 5 with respect to the cassette holder 65 against the compression of springs 62 carried by the cassette holder. Pivoting of the locking means 73 is detected by a position sensor 66 attached to the cassette holder 65.

  It should be noted that the protective cover 14 and the half-disk-shaped supports 27 provide a function to deter a user when inserting the cassette into the cassette holder 65.

  The linear actuator controlling the movement of the cassette holder 65 moves the cassette holder into the cassette insertion position to arrange the irrigation pump 11i and suction 11a segments of the irrigation and suction manifolds 11a. between the shoes 53i, 53a and the wheels 54i, 54a respectively roller of the irrigation pump and the suction pump. Position sensors 88 are attached to the frame 61 to control the movement of the cassette holder 65 in the plane P perpendicular to the translation direction T. A rod 86 is attached to the linear actuator controlling the movement of the cassette holder 65 to abut against the frame stop the movement of the cassette holder in the insertion position of the cassette.

  The linear actuator 85 controlling the displacement of the mobile carriage 63 then moves the latter in the direction of translation T from the rest position to the pumping position in order to drive the cassette holder 65 in displacement and to press the pumping segments into position. irrigation 1 i and suction of the cassette between the shoes and the rollers respectively of the irrigation pump and the suction pump. Position sensors 90 are fixed to the frame 61 to control the displacement of the carriage 63 in the direction of translation T. The shoes 53i, 53a of the peristaltic irrigation and suction pumps move against the compression of the springs 91 arranged around the slides 87 for adjusting a rolling pressure between the shoes 53i, 53a and the rollers 55i, 55a when the carriage 63 has moved into the pumping position. The centering means 79 carried by the movable carriage 63 is inserted in a centering means 81 carried by the casing 21 of the cassette for centering the cassette relative to the carriage 63 in the pumping position.

  Advantageously, the carriage 63 carries cassette recognition fingers 77 movable relative to the carriage in the direction of translation T. The cassette recognition fingers 77 are moved by the carriage parallel to the translation direction T to cooperate with corresponding marks formed in the casing 21 of the cassette to recognize the latter in the pumping position and thus pre-set some operating parameters of the irrigation and suction machine, in particular the rotational speed of the roller wheel of the pump. irrigation. Position sensors 68 are provided on the frame 63 to detect the presence or absence of the cassette recognition fingers 77 and thereby identify the cassette inserted in the irrigation and suction machine.

  Irrigation tubing 1 i is supplied with physiological fluid from a reservoir and a complementary irrigation tubing 37 engaging in inlet channel 3i of housing 21. Pumping segment 11 i of the Irrigation tubing 1 i cooperates with the peristaltic irrigation pump 51i disposed in the irrigation and suction machine in which the cassette is inserted to circulate the physiological fluid in the complementary irrigation tubing 39 engaging in the outlet channel 29i communicating with the irrigation tubing li and opening into an endoscope cannula placed in a surgical area of a patient, for example a knee or shoulder joint.

  The pumping segment 11a of the suction pipe co-operates with the peristaltic suction pump 51a disposed in the irrigation and suction machine to suck, in the suction pipe 1a, a fluid coming either from a cannula or another surgical tool, for example a shaver, through respectively complementary suction pipes 33 and 35, one being compressed to be obstructed when the other is in use. For this purpose, the carriage 63 carries two shutters 67a, 69a movable with respect to the carriage 63 in the direction of translation T. Linear actuators 94 move one or the other of the shutters to compress one or the other. other complementary suction pipes 33,35 against the bottom wall 37 of the chamber 31 integrated in the housing 21 of the cassette in the position of obstruction of the inlet channel 23a communicating with the suction pipe 1a or in the obstruction position of the third input channel 25 shunted with respect to this input channel 23a.

  The aspirated fluid flows to a receptacle outside the irrigation and suction machine through a complementary suction pipe 41 engaging in the outlet channel 29a communicating with the suction pipe la.

  The communication channel 28 between the outlet channel 29i communicating with the irrigation pipe 1 i and the inlet channel 23a communicating with the suction pipe the or the third inlet channel 25 connected in shunt with respect to this the last is controlled from an obstruction position to a circulating position to handle an accidental overpressure in the patient's joint. For this purpose, the movable carriage 63 carries a third shutter 71 movable with respect to the carriage 63 in the direction of translation T. A linear actuator 96 controls the third shutter in displacement to compress the communication tubing 28 against the bottom wall 45 of the the chamber 43 integrated in the housing 21 in the position of obstruction of this communication pipe 28.

  Advantageously, the mobile carriage 63 carries one or two air pressure taps formed of teats 95 communicating with pressure sensors fixed for example to the frame 61 to determine the pressure detected for example on the complementary irrigation pipe 39 by a detector with membrane. The teats 95 are disposed on the movable carriage 63 to fit into the pressure taps 47 incorporated in the casing 21 of the cassette according to the invention when the movable carriage 63 has moved into the pumping position. A seal 46 is mounted around the pressure taps 47 incorporated in the housing to provide airtight contact with the nipples in the pumping position of the movable carriage 63.

  At the end of use, the linear actuator 85 controlling the displacement of the movable carriage 63 moves the latter in the direction of translation T from the pumping position to the rest position to loosen the irrigation pump segments 1 i and d suction between the shoes and the rollers respectively of the irrigation pump and the suction pump. The position sensors 90 fixed to the frame 61 control the movement of the carriage 63 in the direction of translation T. A stop is fixed to the frame 61 to stop the movement of the carriage in the rest position.

  The linear actuator controlling the movement of the cassette holder 65 then moves the cassette holder to the cassette ejection position to move the irrigation pump section 11i and suction pump segments 11a away from the shoes 53i, 53a and wheels 54i, 54a. with rollers respectively of the irrigation pump and the suction pump. The position sensors 88 attached to the frame 61 control the movement of the cassette holder 65 in the plane P perpendicular to the translation direction T. A stop 64 is fixed to the frame to stop the movement of the cassette holder in the ejection position cassette.

  To manually remove the cassette from the irrigation and suction machine, the locking means 73 pivotally mounted relative to the cassette holder 65 is actuated by an abutment 75 fixed to the frame 63 to pivot relative to the holder. cassette 65 when the latter moves parallel to the plane P perpendicular to the translation direction T, from the cassette insertion position to the cassette ejection position. The compression springs 62 carried by the cassette holder then eject the tape from the cassette holder. The irrigation and suction machine is ready for use with a new cassette.

Claims (11)

  1. Cassette for insertion in an irrigation or aspiration machine used in endoscopy comprising an irrigation pipe (1 i) or a suction pipe (1a) and a support (5) provided with an (3i) or two input jacks (3i, 3a) and one (7i) or two output jacks (7i, 7a), the one or both tubing forming a bend (9i, 9a) for s' engage with one or both of the inlet and outlet outlets in a direction of flow respectively entering (E) and outgoing (S) and forming an irrigation pump section (11i) or aspiration (11a) according to the direction Incoming (E) circulation, characterized in that the support (5) comprises a T-shaped guide (13) shaped to the head of the T to protect the bend (9i, 9a) of each tubular (1 i, 1 a) and shaped along the body of the T in a housing (19) guiding the one or both pipes in the direction of outflow (S), the T-guide (13) extending between the one or both inlet jacks (3i , 3a) to form the segment of irrigation pump (11i) or suction pump (11a) on either side of the housing (19) between each intake port (3i, 3a) and the head of the T. 2. Cassette according to claim 1, characterized in that the head of the T comprises a protective cover (14) of the elbow (9i, 9a) of each tubular.   3. Cassette according to claim 1 or 2, characterized in that the head of the T comprises a double rounded (17) for guiding the bend (9i, 9a) of each tubulure.   4. Cassette according to claim 1, characterized in that the T-guide (13) is fixed to a housing (21) integrated in the support (5) and provided with a (23i) or two input channels (23i). , 23a) open at an input end (15i, 15a) and opening at an opposite end through the (3i) or the input jacks (3i, 3a) to provide communication with the (1 i) or both tubing (1 i, 1 a) according to the incoming flow direction (E).   5. Cassette according to claim 4, characterized in that the housing (21) is provided with a third inlet channel (25) open at one end (26) and disposed in parallel with the inlet channel (23a). ) communicating with the suction pipe (1a) to open, at an opposite end, the inlet port (3a) providing communication with the suction pipe (la).   6. Cassette according to claim 5, characterized in that the inlet channel (23a) communicating with the suction pipe (1a) and the third inlet channel (25) mounted in a bypass open, at the opposite end to the input socket (3a) providing communication with the suction pipe (la), in a chamber (31) integrated in the housing and receiving two complementary suction pipes (33,35) engaging with these two channels (23a, 25) being disposed at a distance from a bottom wall (36) of the chamber (31) to be compressed against this bottom wall (36) in a position of obstruction of this channel; inlet (23a) communicating with the suction pipe (1a) or this third inlet channel (25).   7. Cassette according to claim 4, 5 or 6, characterized in that the housing (21) is provided with a (29i) or two outlet channels (29i, 29a) open at an outlet end and opening at a opposite end by the (7i) or the outlets (7i, 7a) to ensure communication with the (li) or the two pipes (1 i, 1 a) in the direction of outflow (S).   8. Cassette according to claim 7, characterized in that the (29i) or the outlet channels (29i, 29a) are carried by supports (27) extending in a plane perpendicular to a plane of the housing to be raised by to the input channels (23i, 23a, 25).   9. Cassette according to claim 7 or 8, characterized in that the housing (21) is provided with a communication path (28) between the outlet channel (29i) communicating with the irrigation tubing (li) and the an inlet channel (23a) communicating with the suction manifold (la) or the third inlet channel (25) which is shunted relative thereto.   10. Cassette according to claim 9, characterized in that the communication path (28) is provided by a tubing disposed in a chamber (43) and at a distance from a bottom wall (45) of this chamber to be compressed against this bottom wall in a position of obstruction of this communication path.   11. Cassette according to any one of claims 1 to 10, characterized in that the support (5), the T-guide (13) with the double rounded (17) to the head of the T and the housing (21) of body of the T, the housing integrated in the support (21) provided with (23i) or input channels (23i, 23a), the third input channel (25), the (3i) or the input sockets ( 3i, 3a), the (7i) or outlet jacks (7i, 7a) and the supports (27) are integrally molded by plastic injection.