WO2006061027A2 - Cannula inserter - Google Patents
Cannula inserter Download PDFInfo
- Publication number
- WO2006061027A2 WO2006061027A2 PCT/DK2005/050010 DK2005050010W WO2006061027A2 WO 2006061027 A2 WO2006061027 A2 WO 2006061027A2 DK 2005050010 W DK2005050010 W DK 2005050010W WO 2006061027 A2 WO2006061027 A2 WO 2006061027A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- needle
- inserter
- housing
- cannula
- unit
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0612—Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
- A61M2005/1585—Needle inserters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
- A61M2005/1587—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body suitable for being connected to an infusion line after insertion into a patient
Definitions
- the invention relates to an inserter for an infusion set for intermittent or continuous administration of a therapeutical substance, such as e.g. insulin.
- the inserter comprises a needle unit comprising an insertion needle and a cannula housing comprising a soft plastic cannula to be placed subcutaneously in a patient.
- EP 688232 B1 relates to a low-profile, angled infusion set comprising a cannula housing with a soft plastic cannula to be placed inside the body of a patient. During insertion the cannula housing is locked to a needle hub and the insertion set is placed by hand i.e. the set does not comprise an inserter.
- US 2002/0077599 A1 concerns an inserter for a low-profile, angled infusion set which inserter comprises an inserter housing having a bottom wall, a retainer slidably connected to the inserter housing for movement between retracted and extended positions in a direction substantially parallel with the bottom wall.
- the inserter also comprises a base member connected to the outer surface of the inserter housing.
- the retainer is adapted to releasably receive a cannula housing.
- the retainer 30 moves forward and causes the needle 27 and the cannula 26 to pierce the skin at a proper angle and enter into the subcutaneous layer at a proper distance.
- the cannula housing 28 can then be released from the inserter assembly 10 by depressing the release button 66. Afterwards the mounting pad 80 is secured to the skin and the needle 27 is removed, thus leaving the cannula 26 in place.
- This reference concerns a rather complex structure and the complexity necessitates the use of two housing portions, an upper and a lower which portions may be constructed of any suitable material, and can be retained together through screws (23, fig. 5), interlocking tabs, adhesive, heat-staking or a combination thereof, or any other well-known fastening means.
- the invention concerns a disposable, low-profile inserter for an angled infusion set which inserter comprises a set housing, a cannula housing, a needle hub, a spring unit and a carrier body, where
- “Adjoined” means that the needle is placed adequately close to the cannula to assure the subcutaneously insertion of the cannula whether the needle is placed inside, beside or around the cannula.
- the needle hub and the carrier body are created as a single unit e.g. by molding together a movable part of the set housing and a needle hub or e.g. by fastening an insertion needle directly to a movable part of the set housing.
- an infusion set known per se as for example the set known from EP 688232 B1 forming an unreleasable connection between a carrier body and the needle hub where after the needle unit comprising the carrier body and the needle hub are fastened in the set housing during production of the inserter.
- the unreleasable connection could be formed e.g. by gluing, welding or by mechanically locking the two units to each other.
- the set housing is formed of a single U-shaped piece of material.
- the set housing is U-shaped which means that it is constructed of a rectangular or elliptic piece of flat material which is bent in such a way that the ends of the material - seen from the side - forms two substantial parallel legs connected in one end with a straight or arched line, where the legs are not necessarily of the same length.
- the material is of a bend form which does not mean that it is constructed by bending; it could e.g. be molded in a bend form.
- the part called the lower leg is the leg in contact with the user when the inserter is in position for insertion of the infusion device.
- Fig. 1 is an upper/side view of an embodiment of the inserter of the invention with the infusion set in a retracted position;
- Fig. 3 is an upper/side view of the inserter with the infusion set in an advanced position where the cannula housing has been detached from the needle unit;
- Fig. 4 is an upper/side view of the needle unit attached to the cannula housing
- Fig. 5 is a lower/side exploded view of another embodiment of the inserter with the infusion set
- Fig. 6 is an upper/side exploded view of the inserter shown in fig. 5 with the infusion set;
- Fig. 10 shows the carrier body of the third embodiment in a retracted position ready for insertion
- Fig. 11 shows a side view of a fourth embodiment with C-formed spring units
- Fig. 12A shows a spring unit similar to the fourth embodiment seen from above/front
- Fig. 13 shows a fifth embodiment with a circular spring seen from the side A, from above B and from behind C;
- Fig. 17 shows a ninth embodiment with a spring unit fastened to opposite sides of the set housing and the embodiment is shown in (A) a forward position seen from the side, (B) a retracted position seen from the side, (C) a forward position seen from above, (D) a retracted position seen from above.
- Fig. 21 shows an infusions set which can be inserted with the inserter of the invention.
- the guiding means of the set housing in figs. 1-3 comprises two opposite and outward L-profiles 9a standing up from the lower leg 1 b, flanges 9b extending downwardly from the upper leg 1a and flanges 9b extending inwardly from side parts of the upper leg 1a being in contact with the sides 9e of the needle unit 2, 4.
- the corresponding guiding means on the needle unit 2, 4 comprise at the bottom side of the needle unit 2, 4 two inward L-profiles (not shown in figures) which profiles correspond to the outward L-profiles on the set housing 1 , see fig. 5, and on the upper side of the needle unit 2, 4 two flanges 9d are standing up from the top side keeping contact with the upper leg 1a and the flanges 9b.
- two upwardly bend parts 10 are formed. These parts 10 indicate the correct insertion angle for the user when the user inserts the cannula. Also the parts 10 will assure that a mounting pad 14 placed in connection with the cannula housing 3 will be in correct and ready position when the cannula 5 is inserted.
- the spring unit 13 that pushes the needle unit 2, 4 forward when the release button 7 is activated is shown in figures 6 and 7.
- the spring unit 13 is placed between the set housing 1 and the needle unit 2, 4 at the closed end of the U-shaped set housing 1.
- the spring unit 13 is fastened to a protrusion 18a at the back end of the needle hub 2 and to a protrusion 18b on the inside of the set housing 1.
- the spring unit 13 may be any suitable spring but in this embodiment the spring unit 13 is preferably a coil spring which pushes the needle unit 2, 4 away from the set house ending.
- the lower leg 1 b of the set housing 1 is provided with a stopper 12.
- the needle unit 2, 4 stops moving forward when a corresponding protrusion on the needle unit 2, 4 hits the stopper 12.
- two flanges 9f move in tracks 19 formed as grooves in the lower leg 1 b and the stopper 12a is provided as the flanges 9f touches the end of one or both of the tracks 19.
- the needle unit 2, 4 will stop when the front of the needle unit touches the skin of the user.
- the use of a stopper 12 will make it easier to control the dept of insertion, and also the stopper 12 can lock the needle unit 2, 4 to the set housing 1 making it possible to remove inserter and needle unit 2, 4 as a single item after use.
- the stopper 12 is created by the ends of the upper and lower legs 1a and 1 b of a U-shaped set housing 1.
- the leg ends restrict the distance between the upper and the lower leg 1a, 1 b at the open end of the U-shaped set housing.
- this distance is restricted to less than the height of the needle unit 2, 4, the inwardly turned leg ends perform as a stopper 12.
- the needle hub 2 is shown detached from the cannula housing 3 and the carrier body 4.
- the needle hub 2 comprises two openings 15 in the rear half which openings 15 correspond to two projections 16 on the carrier body 4.
- the needle hub 2 and the carrier body 4 are locked relatively to each other in the horizontal plane (in this embodiment the horizontal plane is the plane perpendicular to the contact surfaces between the openings of the needle hub 2 and the projections of the carrier body 4).
- the needle unit 2, 4 comprising the joined needle hub 2 and carrier body 4 is placed in the set housing 1
- the legs 1a and 1 b of the set housing 1 cover the needle unit 2, 4 on two opposite sides and prevent movements in the vertical direction.
- the needle unit 2, 4 together with the cannula housing 3 are released and pushed forward to the advanced position, and the cannula will be placed subcutaneously as the insertion needle 6 placed inside the cannula 5 pierces the skin.
- the cannula could be of a known type as for example described in EP patent no. 688232 where the cannula 5 is arranged in a rectilinear bore through the cannula housing 3.
- the cannula housing according to this document comprises two guide openings and two locking openings in addition to the through bore. These openings are symmetrically shaped about a plane including the central axis of the through passageway and extending perpendicular to the rear side.
- the guide openings are elongated openings of a substantially square cross section which openings are adapted to receive mating guide pins 17 on a connecting needle or connecting hub. In figs. 3, 5, 6 and 7 where the needle unit 2, 4 is separated from the cannula housing 3 it is possible to see the guide pins 17 of the needle hub 2.
- the user can pull the needle unit 2, 4 back into a retracted position and replace the inserter remains in the opened package.
- the user After having disposed of the inserter and the needle unit the user can connect the cannula housing 3 which is now fastened to the user's skin, to a connecting hub.
- the connecting hub can be connected to a luer coupling member through a hose. Through the luer coupling it is possible to administer a suitable therapeutical substance, such as insulin from a pump.
- the connecting hub can also be a closing part with a suitable entrance for the inserting needle of a syringe. Such a closing part can stay in position for up till three days while the user can have medication, e.g. insulin injected through the entrance in order to reduce trauma to the skin.
- the inserter set according to a third embodiment shown in figs. 8-10 comprises a set housing 1 , a needle unit constructed of a needle hub 2 comprising an insertion needle 6 and a carrier body 4 unreleasably connected to the needle hub 2, and a cannula housing 3 comprising a cannula 5.
- the needle unit 2, 4 is in a relaxed, i.e. non-biased or just slightly biased forward position and the needle is covered with a hard case top 20 which has to be removed from the device before use.
- the set housing 1 is formed as a piece of pipe with an oval cut-through profile. Opposite the hard case top 20 the set housing 1 is covered with a removable flat cover 21.
- the flat cover can be provided with an adhesive for assuring the tight closure between the cover 21 and the set housing 1 or it can be welded to the set housing, and any kind of cover which at the same time has the necessary strength to resist transportation and can provide hermetical sealing of the device will do.
- the needle unit 2, 4 is unreleasably connected to a handle 22 which handle on the lower side is provided with a projection 23 for fastening of a spring unit 13 (see fig. 9a and 9b).
- the upper side of the carrier body 4 is provided with guiding means 9d having the form of a rectangular plate, the guiding means 9d of the carrier body 4 fit into guiding means 9b of the set housing 1 having the form of downward L-profiles.
- the combination of the L-profiles and the rectangular plate assures that the carrier body has limited possibilities for moving up and down, and is lead along the wall of the set housing 1 in a very controlled manner.
- the spring unit 13 in this embodiment consists of elastic in the form of an O-ring. The spring is fastened to the lower front part of the set housing 1 at the position p1 and the lower part of the carrier body 4 at position p2.
- the spring unit 13 is fastened behind - and beyond - the carrier part of the carrier body 4 which causes the carrier body 4 to get into a slightly tilted position when the spring is biased as only the lower part of the carrier body 4 is pulled forward by the spring unit 13, and this tilted position can lock or support the locking of the carrier body 4 in the retracted position as the guiding means 9d are provided with a protruding part 30 (see fig. 12, 15, 19, 20) on the rearmost half.
- this protruding part 30 will be influenced by a downward force created because the carrier body 4 is being pulled forward at a low point.
- the needle unit 2, 4 When the user is going to apply the device the needle unit 2, 4 is brought to a retracted position (see fig. 10) by pulling the handle 22 either (1 ) until the projection 23 on the lower side of the handle passes a raised part 24 on the inside of the lower part of the set housing 1 or (2) until the protruding part 30 on the guiding means 9d passes the end of or an opening in the L-profiled guiding means 9b of the set housing 1. Then the user places the upwardly bend parts 10 against the skin and release the needle unit 2, 4.
- the user can push the two pressure points 7 together if the needle unit is locked by (1) or the user can push down at 7a if the needle unit is locked by (2).
- pressure points 7a on both upper and lower side of the set housing 1 in order for the user to apply oppositely directed finger pressures.
- the to points 7 are pushed toward each other the diameter of the housing perpendicular to a line between the pressure points is increased, and as the guiding means 9d on the upper side of the carrier body 4 are caught in the inward L-profiles the projection 23 is lifted free of the raised part 24. This activates the spring unit 13 and causes the needle unit 2, 4 and the attached cannula housing 3 to move forward to an advanced position.
- the spring unit 13 of this embodiment is made of two flat springs and each of them is formed as a C when the spring unit is unbiased. That the flat springs are formed as a C means that they comprise only one convex curve, how the springs are shaped and fastened at each end, 13a and 13b, of the curve will depend on the material and the form chosen for the springs.
- the flat springs 13 are fastened to the bottom wall of the set housing 1 in such a way that the back end 13a of the C-formed spring units 13 are stationary in relation to the set housing 1.
- the front end 13b of the flat springs rests against a surface 4a of the needle unit 2, 4 or is fastened to the needle unit 2, 4.
- the C-formed spring units 13 are placed between the back end of the needle unit 2, 4 and the back end of the set housing 1 and when the handle 22 is pulled back, the spring units 13 are biased, the two ends of the C-formed spring units, 13a and 13b, are brought closer together.
- the release button 17 is activated the spring units 13 will return to the unbiased form and the needle unit 2, 4 will be pushed forward.
- the front end 13b of the flat springs rests against a surface of the needle unit 2, 4 or is fastened to the needle unit 2, 4 but the front end 13b is in this embodiment fastened to the front part of the needle unit 2, 4 below the needle level.
- the flat springs are fastened to the set housing 1 at 13a will depend on which material they are made of as this influence the form - particularly the thickness - they are made in. If the flat springs are made of a plastic material the material where they are fastened to the housing 1 can take almost any form if they e.g. are produced by molding. If the material is of an adequate thickness a protruding part 25 of the flat spring can be squeezed into an opening in the set housing 1. If the flat springs are made of e.g. metal it would be more expensive to form a protruding part 25 on the flat spring, in this case it would in stead be efficient to cut e.g.
- Fig. 13 shows a fifth embodiment of the inserter where the spring unit 13 is formed of a circular spring. The rearmost part 13a of the circular spring unit
- the spring unit 13 is stationary to the set housing 1 and the front part 13b of the circular spring 13 is fastened to the needle unit 2, 4 or to the handle 22 or is simply resting against the movable needle unit 2, 4 or handle 22 in a slightly biased state.
- the spring unit 13 might be formed with a prolonged part 13c lying along the bottom wall of the set housing 1. Such a prolonged part 13c could be fastened anyway along its length but preferably at a position p1 close to the front of the set housing 1.
- Fig. 13A shows an embodiment where the rearmost part 13a of the circular spring unit 13 is resting against the upper part (above needle level) of the set housing 1 and the front part 13b of the circular spring 13 is fastened to the handle 22 by simply resting a specially formed part against the handle 22 in a slightly biased state.
- Fig. 14 shows a sixth embodiment with a spring unit 13 formed as an S and constituted of a flat spring made of metal or plastic.
- the front part 13b of the S-formed spring is fastened to or rests against a surface 4a of the needle unit preferably in a slightly biased state when the needle unit 2, 4 is in its foremost position; the rearmost end of the S-formed spring is fastened to the bottom of the set housing 1.
- the rearmost end is fastened to the housing by a prolonged part 13c which can be placed in a trail formed by two opposite and inward turned, upright L-profiles, fastened at the rear end e.g.
- the spring unit 13 could also be formed as the number 8, have more curves than an ordinary S or more circles than the number 8.
- Fig. 15 shows a seventh embodiment of the inserter where the spring unit 13 is formed of a coiled spring.
- the rearmost part 13a of the coiled spring unit 13 is stationary to the set housing 1 and the front part 13b of the coiled spring 13 is fastened to the needle unit 2, 4 or to the handle 22 or is simply resting against a part of the movable needle unit or handle in a slightly biased state.
- the spring unit 13 might be partly enclosed in a trail lying along the bottom wall of the set housing 1. Such a trail would preferably be made of the same material as the set housing 1.
- the trail can consist of to walls rising from the bottom wall of the set housing 1 , and the walls might be parallel, rounded inwards or inclined toward each other.
- a part of the needle unit 2, 4 is formed as reaching downwards, and this part reaches down into and slides inside the trail.
- the front end 13b of the spring unit 13 is fastened to or rest against this part.
- this part will assure that the spring unit 13 inside the trail is biased by pushing the movable end 13b of the spring unit 13 towards the stationary end 13a.
- Fig. 16 shows an eighth embodiment of the inserter where the spring unit 13 is a circular or rectangular leaf spring.
- the back end 13a of thisflat spring13 is stationary to the set housing 1 , and the back end 13b is fastened or rest against a part of the top wall of the set housing 1.
- the front end 13b is fastened to the lower side of the needle unit 2, 4 e.g. at a position p2 (see fig. 9a and 9b).
- Fig. 17 shows a ninth embodiment of the inserter where the spring unit 13 is fastened to opposite walls of the set housing 1.
- the front ends 13b of the spring unit 13 is fastened to the side walls of the set housing 1
- the rearmost part 13a of the spring unit 13 is fastened to or rests against the movable needle unit 2, 4 at a position p3.
- the spring unit 13 forms a loop around a low part of the needle unit 2, 4, and does not actually touch the position p3 when the spring unit is in an unbiased state.
- this embodiment would be made of a metal wire or another material with similar characteristics.
- the spring unit 13 of a flat spring where the foremost part is resting against the position p3 and indicated in fig. C and D with a thin black line, and the rearmost part is fastened to the side walls of the set housing 1 at the rear position of the side walls.
- the flat spring could be made of metal or plastic.
- Fig. 18 shows an inserter with a spiral spring 13 where one end 13a of the spring is fixed to a bottom part of the needle unit 2, 4, and the other end 13b is fixed to a hook or similar at the front part of the set housing 1.
- the spiral spring When retracting the needle unit 2, 4 the spiral spring is uncoiled, and when releasing the retainer the spring coils up and moves forward, causing the needle and cannula to pierce the skin at a proper angle and enter into the subcutaneous layer at a proper distance.
- a tension spring could be made into a compression spring by passing both spring wire ends through the centre of the coils/turns of the spring to the opposite end of the spring. When pulling the wire ends the spring will compress.
- the spring unit 13 is made of two flat springs and each of them is formed as a slightly bend S. That the flat springs are formed as an S means that they comprise two convex curves.
- the flat springs 13 are fastened to the top wall of the set housing 1 in such a way that the back end 13a of the S-formed spring units 13 are stationary in relation to the set housing 1.
- the front ends 13b of the flat springs are fastened to the needle unit 2, 4.
- the S- formed spring units 13 are placed between the front end of the needle unit 2, 4 and the back end of the set housing 1 and when the handle 22 is pulled back, the spring units 13 are biased, the two ends of the S-formed spring units, 13a and 13b, are brought closer together.
- the release button 17 is activated the spring units 13 will return to the unbiased form and the needle unit 2, 4 will be pushed forward.
- Fig. 21 shows an infusions set which can be inserted with the inserter of the invention.
- the infusion set comprises an infusion part which will be inserted with the inserter and a connector part which after insertion can form the connection between e.g. an insulin pump and the infusion part.
- the connector part is symmetrical around the plane formed by the two arms.
- the spring unit shown here are compression springs, except the third embodiment which is provided with a spring unit constituted by an elastic O-ring and the tenth embodiment which is provided with a spring unit constituted by a flat spiral spring; these units are tension springs.
- the ninth embodiment which is constituted by a round thread works both as a compression and tension spring.
- Spring units can e.g. be made of steel and in plastic.
- Spring units in plastic would preferably be made of POM (Polyoxymethylene), and set housing, hard case top and carrier body would preferably be made of PP (Polypropylene). If the spring unit and the carrier body are molded together as one unit the preferred material would be POM.
- POM Polyoxymethylene
- PP Polypropylene
- flat spring comprises “leaf spring”.
- magnets In stead of using a spring unit 13 to bring the needle unit 2, 4 from a retracted to a forward position it would be possible to use magnets.
- repulsive magnets with an adequate repulsive force to move the needle unit 2, 4 from a retracted to a forward position should be chosen.
- One magnet is placed in the set housing 1 and another magnet is placed at the needle unit 2, 4 carrying the infusion device. The repulsion between the magnets will force the needle unit 2, 4 in a forward direction when releasing the needle unit 2, 4 by activating a release button.
- the magnets can be molded into the set housing and into the needle unit respectively in order to protect and hide the magnets. Further the repulsive magnets should be made in different sizes in order to avoid that the magnetic field changes.
- Fig. 21 shows an infusion set comprising a connector part 40 and cannula housing 3.
- the cannula housing 3 can be inserted with the inserter according to the claims. After insertion the insertion needle 6 of the inserter is removed together with the inserter and the connector part 40 is placed in the shown position.
- the connector part 40 is symmetrical around the plane which is parallel to the needle and comprises the two arms 41 of the connector part 40.
- This connector part 41 also comprises a connector needle 42 which needle penetrates a barrier layer in the cannula housing 3.
- the connector part 40 can be connected to a luer coupling member through a not shown tube. Through the luer coupling it is possible to administer a suitable therapeutical substance, such as insulin from a pump.
- the connector part can also be a sort of closing part with a suitable entrance for an inserting needle of a syringe. Such a closing part can stay in position for up till three days while the user can have medication, e.g. insulin injected through the entrance in order to reduce trauma to the skin caused by repeated penetration of the skin.
Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ556118A NZ556118A (en) | 2004-12-10 | 2005-12-09 | Inserter for a medical infuser |
CA002589693A CA2589693A1 (en) | 2004-12-10 | 2005-12-09 | Inserter |
US11/721,263 US7867200B2 (en) | 2004-12-10 | 2005-12-09 | Inserter |
CN2005800422356A CN101072597B (en) | 2004-12-10 | 2005-12-09 | Inserter |
EP05812876A EP1824537A2 (en) | 2004-12-10 | 2005-12-09 | Cannula inserter |
MX2007006840A MX2007006840A (en) | 2004-12-10 | 2005-12-09 | Cannula inserter. |
JP2007544738A JP4964141B2 (en) | 2004-12-10 | 2005-12-09 | Insertion tool |
AU2005313662A AU2005313662B2 (en) | 2004-12-10 | 2005-12-09 | Cannula inserter |
IL183601A IL183601A (en) | 2004-12-10 | 2007-05-31 | Cannula inserter |
NO20073064A NO20073064L (en) | 2004-12-10 | 2007-06-15 | its introduction |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US63494004P | 2004-12-10 | 2004-12-10 | |
DKPA200401914 | 2004-12-10 | ||
US60/634,940 | 2004-12-10 | ||
DKPA200401914 | 2004-12-10 | ||
US67945305P | 2005-05-09 | 2005-05-09 | |
US60/679,453 | 2005-05-09 | ||
US69947205P | 2005-07-15 | 2005-07-15 | |
US60/699,472 | 2005-07-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2006061027A2 true WO2006061027A2 (en) | 2006-06-15 |
WO2006061027A3 WO2006061027A3 (en) | 2006-09-28 |
Family
ID=36035818
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK2005/050010 WO2006061027A2 (en) | 2004-12-10 | 2005-12-09 | Cannula inserter |
Country Status (11)
Country | Link |
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US (2) | US7867200B2 (en) |
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- 2005-12-09 EP EP05812876A patent/EP1824537A2/en not_active Ceased
- 2005-12-09 WO PCT/DK2005/050010 patent/WO2006061027A2/en active Application Filing
- 2005-12-09 CA CA002589693A patent/CA2589693A1/en not_active Abandoned
- 2005-12-09 US US11/721,263 patent/US7867200B2/en active Active
- 2005-12-09 JP JP2007544738A patent/JP4964141B2/en active Active
- 2005-12-09 CN CN2005800422356A patent/CN101072597B/en active Active
- 2005-12-09 US US11/298,259 patent/US7867199B2/en active Active
- 2005-12-09 KR KR1020077013624A patent/KR20070086306A/en active IP Right Grant
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2007
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Also Published As
Publication number | Publication date |
---|---|
EP1824537A2 (en) | 2007-08-29 |
US7867200B2 (en) | 2011-01-11 |
CA2589693A1 (en) | 2006-06-15 |
MX2007006840A (en) | 2007-08-14 |
AU2005313662B2 (en) | 2011-07-14 |
KR20070086306A (en) | 2007-08-27 |
JP2008522680A (en) | 2008-07-03 |
WO2006061027A3 (en) | 2006-09-28 |
JP4964141B2 (en) | 2012-06-27 |
IL183601A (en) | 2012-06-28 |
IL183601A0 (en) | 2007-09-20 |
US20060161108A1 (en) | 2006-07-20 |
AU2005313662A1 (en) | 2006-06-15 |
NO20073064L (en) | 2007-09-04 |
US7867199B2 (en) | 2011-01-11 |
CN101072597A (en) | 2007-11-14 |
CN101072597B (en) | 2010-06-16 |
US20090306596A1 (en) | 2009-12-10 |
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