HK1125059B - One piece sealing reservoir for an insulin infusion pump - Google Patents

Description

Integrally formed sealed storage tank for insulin pump

Technical Field

The present invention relates to a fluid reservoir shared with an insulin pump, which is named as an integrally formed fluid reservoir (one-piece fluid reservoirs), which contains a male luer fitting (male luer fitting) and through which the fitting can be sealingly engaged with the housing of the insulin pump.

Background

Infusion pumps (pumps, herein referred to as pumps) are used to provide diabetic patients with a quantity of insulin or other medication to inject into their patients, and prior art pumps have generally employed a piston device (piston) to act on their fluid reservoirs and force their fluids, such as: insulin from a fluid reservoir, through a catheter, through an infusion device, and then into the body.

Infusion pumps used in the past, such as U.S. Pat. No. 6,248,093, have an O-ring or other equivalent fitting that provides a waterproof or water resistant enclosure between the fluid reservoir, infusion pump and pump housing, and that provides such waterproof or water resistant enclosure between the fluid reservoir and housing, and that allows a user wearing such a pump to engage in more water-related activities, such as showering, and that provides additional advantages if water resistant.

Earlier, fluid reservoirs used with water resistant pumps, having a septum-sealed reservoir (septal sealed reservoir) or a luer-type reservoir (luer sealed reservoir), which required a drilling member to drill through its septum so that fluid could be piped to a conduit and then delivered to an infusion pump, having a reservoir to which a male luer fitting was engaged, having another unit which could be engaged with its fluid reservoir and then with a water resistant pump, thus both types of pumps, which required an additional unit with or without a drilling member and having its fluid reservoir engaged with the pump housing in a water resistant seal, although the designs described above have their advantages, the present invention has the further advantage over the designs described above of being a single piece, a single unit and having the fluid reservoir engaged with a male luer fitting at the end of its movable end, thus, the integrated rows of reservoirs may engage the openings of the pump housing in a water resistant package.

It is more convenient for the user to use an integrated in-line fluid reservoir than a multi-unit, and the manufacturing process is more advantageous when an integrated in-line design is used. In addition, using the design of the unit cell of the present invention in conjunction with a luer fitting, the luer fitting can be used to receive a needle that can remove its solution from a large insulin container, and the luer fitting can then be used to engage a female luer fitting that can engage a catheter having an insulin device on its removable tip when the fluid reservoir is engaged with the pump.

The present invention provides an integrally lined fluid reservoir shared with an insulin pump, thereby achieving the purpose of integrally lining the same, which is a unitary unit but has multiple functions, and the multiple functions achieved by the integrally lined fluid reservoir shared with an insulin pump of the present invention and the structural description thereof will be described below.

Disclosure of Invention

In view of the foregoing, it is an object of the present invention to provide a fluid reservoir assembly for use with a fluid pump having a housing and a fluid reservoir chamber, a threaded portion, a cylindrical reservoir chamber opening and a piston, the piston being operable on the fluid reservoir assembly when the fluid reservoir is present in the reservoir chamber, the fluid reservoir assembly comprising a one-piece barrel having a cylindrical barrel portion with a barrel diameter and first and second open ends, a male luer fitting engageable with the second end of the cylindrical barrel portion, the male luer fitting having an opening at the top end of the movable portion, a neck portion with the neck portion engaged with the cylindrical barrel portion, the neck of which has threads sized to fit the threads of its cylindrical reservoir chamber opening, a cylindrical sealing surface in a fluid-tight relationship against the fluid reservoir chamber opening of its pump housing, and a cylindrical seal member that engages the neck of its barrel; the plunger is sized to fit within the open end of its integrally formed barrel into which it can be pushed.

By the technical scheme, the invention at least has the following advantages and beneficial effects:

1. a screw fitting engaged with the female screw portion of the housing or the housing of the infusion pump may secure the fluid reservoir in place.

2. The sealing surface of the O-ring engaging the irrigation pump housing prevents the influx of water.

3. A non-return detent (detents) adjustably engaged with a hole in which the pump housing is filled is provided to prevent inadvertent release of the fluid reservoir.

4. The through hole of the pressure inside the casing of the perfusion pump can be adjusted to adapt to the external air pressure.

5. The aperture opening in the luer portion of the fluid reservoir allows the drug to flow from the reservoir and provides a movement that resists the direction of flow so that the pump senses the direction of flow and measures the amount of drug delivered.

6. When the reservoir is screwed into the pump, the head end can support the reservoir.

7. The plunger and the push rod are both provided with spiral parts, which can prevent the push rod from being stuck in the plunger after the push rod is placed in the pump, so that the push rod is difficult to remove.

The integrally formed fluid reservoir may provide a 1.8 ml, 3.0 ml or other volume for use with a hand-held infusion pump to deliver medication, such as insulin, and employs a universal male luer fitting for engaging a patient to whom the infusion pump is to be connected to a syringe delivery device having a female luer fitting.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is an exploded view of the push rod of the integrally formed fluid reservoir and a plunger of the present invention.

FIG. 2 is a schematic cross-sectional view of a fluid reservoir of the present invention including a plunger of the push rod.

FIG. 3 is an angular cross-sectional view of the second top end of the cartridge portion, showing its engaged sealing surface, head end and other structure, and including its male luer fitting in engaged relation with the cartridge body.

Fig. 4 is a cross-sectional view similar to fig. 3, but viewed from another angle.

FIG. 5 is a front cross-sectional view of the barrel of the fluid reservoir, showing the engagement of the port engaged therein and its filterable medium or the outer wall of the port.

FIG. 6 is a cross-sectional view of a plunger having a helical face and a pusher portion having a helical face, showing the flattened end of the helical portion.

FIG. 7 is a cross-sectional view of the fluid reservoir of the present invention in relation to a pump housing having a reservoir cavity and a reservoir cavity opening.

FIG. 8 is a schematic view of the fluid reservoir of the present invention in a manner that fills its empty fluid reservoir by being inserted into a fluid pump.

FIG. 9 is a top sectional view illustrating the engagement of the fluid reservoir of the present invention with the reservoir cavity of the pump housing.

Figure 10 is a side sectional view showing the engagement of the fluid reservoir and pump of the present invention, the infusion set housing with a female luer fitting on the tip of its catheter and the male luer fitting of the present invention.

10: fluid reservoir apparatus 20: luer part

22: male luer 24: head end

26: the spiral portion 28: non-return claw

28A: check pawl hole 30: sealing surface

32: hole opening 36: filterable media

34: through holes 40, 42: neck part

44, 44A: the spiral part 60: barrel part

70: plunger 72: helicoid

74: o-ring 76: flat end

90: the push rod 90: push rod

92: the grip 94: helicoid

98: flat end 100: needle-like device

102: injection needle 106: container with a lid

110: the conduit 112: catheter tube

114: female luer fitting 114A: screw part

F: fluid DP: piston

H: a housing RCO: reservoir cavity opening

RC: a storage tank cavity H: shell body

M: motor with a stator having a stator core

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be made on specific embodiments, structures, features and effects of the integrally formed sealed storage tank for insulin pump according to the present invention with reference to the accompanying drawings and preferred embodiments.

An integrally formed sealed reservoir for an insulin pump according to a preferred embodiment of the present invention will now be described with reference to the accompanying drawings. For ease of understanding, like elements in the following embodiments are illustrated with like reference numerals.

FIG. 1 is an exploded view of an integrally formed fluid reservoir and a plunger of the present invention. The fluid reservoir 10 has a Luer portion 20, a neck portion 40 and a barrel portion 60. a plunger 70 is sized to be pushed into the interior surface of the barrel and a plunger rod 90 engaged with the plunger is movably engaged with the plunger, and the barrel portion 60 is adapted to receive and dispense its medication into and out of the pump in close cooperation with a drive piston of the pump (as shown in fig. 9).

Referring to FIG. 2, which is a schematic cross-sectional view of a fluid reservoir of the present invention including a plunger having a push rod, a plunger 70 and a push rod 90, the plunger 70 has a spiral surface 72 that engages a spiral surface 94 of the push rod 90, and the plunger is adapted to receive at least one O-ring or O-rings 74 thereon at an outer surface thereof for sealing against the body 60 of the fluid reservoir 10.

Fig. 8 is a schematic diagram of a fluid storage tank according to the present invention, which is inserted into a fluid pump to fill an empty fluid storage tank. The push rod 90 with the grip 92 may be used to pull the plunger 70 during filling of the fluid reservoir 10, thereby drawing medication from a larger, particularly septum-sealed, container 106, and the push rod 90 may be released from the plunger 70 and discarded after the fluid reservoir 10 is filled.

Referring to fig. 3, an angular cross-sectional view of the second top end of the barrel, showing the sealing surfaces, head end and other structures engaged therewith, and including the male luer fitting engaged with the barrel, is shown in cross-section of the luer portion 20 and neck 40, the luer portion 20 having a standard male luer 22 with a luer 26 engageable with a luer of a female luer syringe delivery device, the standard male luer specification and its associated structures, such as the luer, etc., in accordance with ISO594-1 and ISO594-2 (the references), and the opening dimensions thereof are discussed in more detail below.

The reservoir 10 may be axially positioned in its infusion pump, with the barrel end first when the push rod 90 is removed, with the reservoir 10 fully inserted in its infusion pump, the coil 44 in the neck 42 engaging the coil in the pump, the head end 24 optionally providing a level of tightness for the reservoir in the infusion pump, the sealing surface 30 being sized slightly smaller than the opening of the reservoir cavity to seal the reservoir 10 to an O-ring (or O-rings) or other similarly functioning object in the pump housing opening (as shown in figure 9), the reservoir sealing object engaging the housing of the infusion pump to provide a water-resistant or water-resistant function to the infusion pump and reservoir that allows the patient to participate in activities such as swimming, bathing, or other activities that may contact water while wearing the pump, thereby affecting the electrical components of the pump, a plurality of non-return claws (28) may engage with the holes of the filling pump to prevent the reservoir from accidentally engaging with the filling pump, and the non-return claws 28 may also be coupled to the inner wall of the sealing surface 30.

Currently available infusion pumps have a device for measuring the volume of drug that is delivered from a fluid reservoir by actuation of an actuation piston, sometimes using a sensing element positioned to sense the amount of plunger actuation by the actuation piston, using a sensing element to sense the amount of plunger actuation that requires movement that is resistant to the direction of drug movement and to sense the number of times that plunger movements are made, luer 22 has an orifice opening 32 that allows drug to flow from the fluid reservoir and provides resistance to movement, orifice opening 32 is of a novel and very small size, ranging in size from 0.003 to 0.020 inches, preferably from 0.005 to 0.010 inches, and very small orifice opening 32 provides a restriction to the flow direction of the infusion pump to measure the amount of drug delivered.

Referring now to FIG. 4, a cross-sectional view similar to that of FIG. 3 but from another angle is shown with the luer portion 20 having at least one through bore 34.

Referring to FIG. 5, a cross-sectional front view of a cylindrical portion of a fluid reservoir showing a connection relationship between a through hole connected therein and a filterable medium or an outer wall of the through hole, wherein the filterable medium 36, particularly, the filterable medium is a hydrophobic material connected to the through hole 34, and when an infusion pump and the fluid reservoir are sealed to prevent water from being infused into the housing, the fluid reservoir has a structure capable of adjusting the pressure inside the housing according to the pressure outside the housing, because the accuracy of the drug delivery is affected when the pressure inside and outside the housing is different, and therefore, in order to adjust the pressure inside the housing according to the pressure outside the housing, the through hole 34 is provided in the luer portion 20 of the reservoir 10, the through hole 34 is covered with a hydrophobic filterable medium 36, and the hydrophobic material is capable of allowing gas to pass through and blocking water or other liquid solution from passing through, thereby blocking water from passing through, and is capable of being adjusted by ultrasonic waves, Heating or other adhesive material is integrated into the reservoir.

Referring to fig. 6, a cross-sectional view of a flat end of a screw is shown for a plunger 70 having a screw 72 and a push rod 90 having a screw 94, the end of the plunger 70 having a screw 72 is a flat end (flat) 76, the end of the push rod 90 having a screw 94 is a similar flat end 98, when the push rod 90 is screwed into engagement with the plunger 70, the screw 72 and the screw 94 will engage with each other, and the flat end 76 and the flat end 98 will abut with each other, which prevents the push rod 90 from becoming trapped in the plunger 70 when the plunger 90 stops, and thus, the push rod cannot be removed easily after filling the reservoir 10.

Referring now to FIG. 7, a cross-sectional view of the fluid reservoir of the present invention in relation to a pump housing having a reservoir cavity and a reservoir cavity opening is shown, wherein the fluid reservoir assembly 10 of the present invention is filled and connected to the pump housing H after the push rod is removed.

The housing H has a reservoir chamber (reservoir chamber) RC and a reservoir chamber opening (reservoir chamber opening) RCO having a non-return detent hole 28A in its wall for engaging the non-return detent 28 of the reservoir device 10 of the present invention, the screw 44 in the neck of the fluid reservoir device 10 being engageable with the screw 44A of the reservoir chamber opening so that the filled fluid reservoir device 10 can be placed in the reservoir chamber, and a motor M actuating its drive piston (drive piston) DP to move axially of its barrel 60 so that its piston is connected to drive fluid out of the luer fitting and into its conduit 110, as shown in fig. 10.

Referring to fig. 8, in order for the fluid reservoir device 10 of the present invention to engage a needle device 100, the needle device 100 is connected in a sealing relationship to a needle 102, the needle 102 having a hollow removable tip with a small bore, the needle device 100 generally including a female luer fitting 114 designed and dimensioned to connect in a snug sealing relationship to the male luer fitting 20 of the barrel of the reservoir 10.

When having the needle means 100 connected to the fluid reservoir means 10, the push rod 90 engaged with the plunger 70, and the plunger 70 in a forward orientation, which is opposite the wall defining the luer barrel portion (including the male luer portion 20), the user may engage a needle 102 of a large container 106 of fluid, particularly insulin, enclosed by a septum, which is withdrawn in the direction of the plunger 90 engaged with the plunger as shown in figure 8, which allows fluid to flow from the container 106 into the fluid reservoir means 10, and when the plunger 70 is at or near the removable open end of its barrel portion 60, the plunger 90 engaged with the plunger may be rotated to disengage the plunger, because the plunger 90 of the present invention is in a flat barrel portion end to flat end screw engagement with the plunger 70, the plunger 70 cannot be rotated in the barrel portion, so the plunger 70 may be easily disengaged from the push rod 90 by rotational movement, after the plunger-engaging push rod 90 is disengaged from its plunger, the reservoir 10 can be axially inserted into its cylindrical pump, as shown in fig. 7 and 9. FIG. 9 is a top sectional view illustrating the engagement of the fluid reservoir of the present invention with the reservoir cavity of the pump housing.

The fluid reservoir assembly of the present invention has a barrel portion sized to be received within the reservoir chamber through the reservoir chamber opening and aligned with the wall of the chamber such that the barrel portion is axially aligned with the drive piston when the fluid reservoir assembly 10 of the present invention is received within the housing H thereof, such as: the Mini-Med Model MMT-551, with its screw 44A engaging the screw 44 of the reservoir 10, will have the reservoir 10 positioned in its reservoir cavity RC with a distance therebetween to receive its sealing surface 30 to engage its O-ring or other associated sealing element in its reservoir cavity opening by the engagement and continued rotation of the reservoir 10. In addition, the present invention employs a non-return detent 28 on the wall of the sealing surface 30, particularly a small protrusion, which may fit into a non-return detent hole 28A in the wall of the opening of the reservoir cavity, as shown in FIG. 7.

Referring now to FIG. 10, a side cross-sectional view is shown depicting the engagement of the fluid reservoir and pump of the present invention, the infusion set housing with a female luer fitting at the tip of its catheter, and the male luer fitting of the present invention. The pump P is placed on the body by the user using a safety band, and the pump P with infusion set assembly is shown having a fluid conduit (conduit)112 engaged therein, with a female luer fitting 114 at the top of the fluid conduit 112 connected to the reservoir 10 of the present invention, the female luer fitting 114 having a luer portion 114A at its base so as to be engageable with the luer portion 26 of the fluid reservoir 10, whereby fluid from the fluid reservoir 10 can be propelled by the advancing drive piston DP, through the male and female luer fittings to the conduit 112, to the infusion set thereof, and then injected into the body by conventional means.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (22)

1. A fluid reservoir assembly for engagement with a pump having a housing and a reservoir chamber, having a cylindrical reservoir chamber opening with a threaded portion, and a piston that acts on the fluid reservoir assembly when the fluid reservoir assembly is present in the reservoir chamber, the fluid reservoir assembly comprising:

an integrally formed barrel comprising a cylindrical barrel portion having a barrel diameter and a first open end and a second top end, a male luer fitting engaged with the second top end of the cylindrical barrel portion, a neck having a removable portion top end with an opening at the male luer fitting, and a cylindrical sealing surface engaged with the neck of the integrally formed barrel, the neck engaged with the cylindrical barrel portion, the neck having a thread sized to conform to the spiral portion of the cylindrical reservoir cavity opening for engagement, the cylindrical sealing surface in fluid-tight relation to the cylindrical reservoir cavity opening of the pump, the cylindrical sealing surface engaged with the neck of the integrally formed barrel; and

a plunger sized to fit within the first open end of the integrally formed barrel.

2. A device for injecting a fluid into subcutaneous tissue of a human body, the device comprising:

a pump having a housing and a reservoir chamber, a cylindrical reservoir chamber opening having a screw portion, and a driving piston;

a fluid reservoir apparatus, comprising:

an integrally formed barrel comprising a cylindrical barrel portion having a barrel diameter and a first open end and a second top end, a male luer fitting engaged with the second top end of the cylindrical barrel portion, a neck having a thread sized to conform to the spiral portion of the cylindrical reservoir chamber opening for engagement, and a cylindrical sealing surface in a fluid-tight relationship against the cylindrical reservoir chamber opening of the pump, the cylindrical sealing surface engaged with the neck of the integrally formed barrel; and

a plunger sized to fit into the first open end of the integrally formed barrel;

a conduit having a first end and a second end, the first end being engaged with the male luer fitting of the fluid reservoir device; and

an infusion device engaged with the second tip of the catheter, the infusion device comprising a cannula that is used in subcutaneous tissue to inject a fluid from the fluid reservoir device, the fluid, when engaged, flowing through the male luer fitting and the catheter engaged by the infusion device, into the infusion device, and then into the body.

3. The fluid reservoir assembly of claim 1, further comprising a locking device for securing the cylindrical barrel to the housing.

4. The fluid reservoir assembly of claim 3, wherein the locking means comprises a plurality of anti-backup fingers on the wall of the cylindrical sealing surface that engage the wall of the cylindrical reservoir chamber opening.

5. The fluid reservoir assembly of claim 1, wherein the integrally formed cylinder further comprises a plurality of head ends.

6. The fluid reservoir assembly of claim 1, wherein the plunger comprises a helical interior.

7. The fluid reservoir assembly of claim 1, wherein the plunger is configured to engage an O-ring.

8. The fluid reservoir apparatus of claim 6, further comprising a push rod having a grip, the push rod having a helical portion, the helical portion of the push rod engaging the helical interior of the plunger.

9. The fluid reservoir assembly of claim 8, wherein the spiral interior of the plunger further comprises a planar displaceable tip, and the spiral portion of the pushrod further comprises a similar planar displaceable tip configured to directly engage the planar displaceable tip from the spiral interior of the plunger.

10. The fluid reservoir assembly of claim 1, wherein the integrally formed cylinder further comprises a plurality of walls defining a through-hole in a surface of the integrally formed cylinder, the interior of the housing being in communication with the exterior when the fluid reservoir assembly is positioned and the cylindrical sealing surface is in a sealing relationship against the cylindrical reservoir chamber opening.

11. The fluid reservoir assembly of claim 10, wherein the through-hole is substantially covered with a filter medium that filters water from a gas and allows the gas to pass therethrough.

12. The fluid reservoir assembly of claim 11, wherein the filter media is hydrophobic.

13. The fluid reservoir assembly of claim 10, wherein an outer surface adjacent the through-hole is covered with a filter media.

14. The fluid reservoir assembly of claim 1, wherein the opening at the top end of the movable portion of the male luer fitting is sized to have a diameter of between 0.003 and 0.020 inches.

15. The fluid reservoir assembly of claim 1, wherein the cylindrical barrel portion has a dimension smaller than the size of the spiral portion of the cylindrical reservoir chamber opening.

16. The fluid reservoir assembly of claim 1, wherein the spiral portion of the cylindrical reservoir chamber opening further comprises at least one O-ring, and the cylindrical sealing surface of the integrally formed cylinder is sized to engage the at least one O-ring.

17. A fluid reservoir assembly for use with a pump having a housing and a reservoir chamber, a cylindrical reservoir chamber opening having a spiral portion and a piston, the piston acting on the fluid reservoir assembly when the fluid reservoir assembly is disposed in the reservoir chamber, the fluid reservoir assembly comprising:

an integrally formed cylinder, comprising:

a cylindrical barrel portion having a first open end and a second top end; a cylindrical sealing surface in a fluid-tight relationship and sized to fit against the cylindrical reservoir chamber opening of the pump;

a male luer fitting on the second end of the cylindrical barrel portion, the male luer fitting having an opening on a removable portion of the male luer fitting, the opening sized between 0.003 to 0.20 inches in diameter; and

a neck having a thread sized to fit the threaded portion of the cylindrical tank cavity opening.

18. A fluid reservoir assembly, comprising:

an integrally formed cylinder, comprising:

a cylindrical barrel portion having a first open end and a second top end;

a male luer fitting coupled to the second top end of the cylindrical barrel portion;

a neck having a thread; and a cylindrical sealing surface for sealing engagement with an opening of a cylindrical tank cavity of a pump, wherein the interior of the pump communicates with the outside through a through-hole engaged with the cylindrical sealing surface, the through-hole being defined by a plurality of walls, the walls of the through-hole being covered with a filterable medium for removing water from the interior volume of the pump.

19. A fluid reservoir assembly for use with a pump having a housing and a reservoir chamber, having a cylindrical reservoir chamber opening with a spiral portion and a piston that acts on the fluid reservoir assembly when the fluid reservoir assembly is present in the reservoir chamber, the fluid reservoir assembly comprising:

an integrally formed cylinder, comprising: a cylindrical barrel portion having a barrel-shaped diameter, a first open end and a second top end; a male luer fitting that engages the second top end of the cylindrical barrel, the male luer fitting having an opening at a removable portion top end of the male luer fitting; a neck part, which is jointed with the cylindrical cylinder part and is provided with a screw thread, and the size of the screw thread is matched with the screw part of the opening of the cylindrical tank cavity body for jointing; a cylindrical sealing surface in a fluid-tight relationship and sized to fit against the cylindrical reservoir chamber opening of the pump, the cylindrical sealing surface being connected to the neck of the integrally formed barrel; and a plurality of head ends;

a plunger sized to fit within the first open end of the integrally formed barrel, the plunger including a helical interior, the plunger configured to engage an O-ring;

a locking device, which comprises a plurality of non-return claws arranged on the wall of the cylindrical sealing surface and jointed with the wall of the opening of the cylindrical storage tank cavity;

a push rod having a grip, the push rod having a helical portion, the helical portion of the push rod engaging the helical interior of the plunger; and

a plurality of walls defining a through-hole at a surface of the integrally formed cylinder whereby an interior of the housing communicates with an exterior when the fluid reservoir assembly and the cylindrical sealing surface are attached against the cylindrical reservoir cavity opening of the pump, wherein the through-hole is substantially covered with a filter media that filters water from a gas and allows the gas to pass therethrough, the filter media is hydrophobic, the opening of the movable top end of the Highway Eriger fitting has a diameter of between 0.003 to 0.020 inches, the spiral portion of the cylindrical reservoir cavity opening further comprises at least one O-ring, and the cylindrical sealing surface of the integrally formed cylinder is sized to engage the at least one O-ring.

20. The fluid reservoir assembly of claim 19, wherein an outer surface adjacent the through-hole is covered with the filtering media.

21. A kit for providing human insulin to a patient, the kit being connectable to the patient by an infusion device, the kit comprising:

a fluid reservoir assembly comprising an integrally formed cylinder, the integrally formed cylinder comprising: a cylindrical barrel portion having a barrel-shaped diameter, a first open end and a second top end; a male luer fitting that engages the second top end of the cylindrical barrel, the male luer fitting having an opening at a removable portion top end of the male luer fitting; a neck part, which is jointed with the cylindrical cylinder part and is provided with a screw thread, and the size of the screw thread is matched with a screw part of an opening of a cylindrical storage tank cavity body so as to be jointed; a cylindrical sealing surface in a fluid tight relationship and sized to fit against the cylindrical reservoir chamber opening of a pump, the cylindrical sealing surface being connected to the neck of the integrally formed barrel; a plunger sized to fit into the first open end of the integrally formed barrel; and a push rod, the push rod is jointed with the plunger piston;

a container containing insulin, the container comprising a septum package;

a needle device having a female luer fitting, the needle device being a needle sized to fit through the container of the septum package; and

the pump has a tank cavity and a cylindrical tank cavity opening having a sealing member sealed thereon.

22. A device for delivering insulin to a diabetic patient, the device comprising:

a pump having a reservoir chamber with a cylindrical reservoir chamber opening having a screw portion and a drive piston, the cylindrical reservoir chamber opening having a sealing element sealed thereon; and

a fluid reservoir apparatus, comprising:

an integrally formed cylinder comprising a cylindrical barrel having a barrel diameter, a first open end and a second top end; a male luer fitting that engages the second top end of the cylindrical barrel, the male luer fitting having an opening at a removable portion top end of the male luer fitting; a neck part, which is jointed with the cylindrical cylinder part and is provided with a screw thread, and the size of the screw thread is matched with the screw part of the opening of the cylindrical tank cavity body for jointing; a cylindrical sealing surface in a fluid tight relationship and sized to fit against the cylindrical reservoir chamber opening of the pump, the cylindrical sealing surface being connected to the neck of the integrally formed barrel.