CN106377816B

CN106377816B - Intravenous therapy device comprising at least one filter assembly

Info

Publication number: CN106377816B
Application number: CN201610831387.4A
Authority: CN
Inventors: 佘利民; 赵杰; 乔尔·K.·傅柯乐; 阿龙·G.·傅柯乐
Original assignee: Health Line International Corp
Current assignee: Health Line International Corp
Priority date: 2014-04-18
Filing date: 2014-06-30
Publication date: 2020-02-14
Anticipated expiration: 2034-06-30
Also published as: CN204233524U; CN104998318A; WO2015160823A1; CN204246586U; CN106377816A; CN104998318B; CN104127932A; CN104127932B; CN108853638A; CN204233526U

Abstract

An intravenous therapy device comprising: a liquid reservoir comprising a first portion configured to initially contain a therapeutic liquid and a second portion configured to initially be isolated from the therapeutic liquid; a removable barrier initially isolating the first and second portions; and a filter assembly located at the second portion, the filter assembly being fluidly connected to an outlet tube that extends through the interface of the liquid reservoir wall.

Description

Intravenous therapy device comprising at least one filter assembly

Description of divisional applications

The present application is a divisional application having an application date of 2014 30/6, application number 201410310823.4, entitled "intravenous therapy device comprising at least one filter".

Technical Field

The present invention relates generally to intravenous therapy devices and related components. In particular, embodiments of the present invention relate to intravenous therapy devices that include at least one filter assembly.

Background

In the medical field, and particularly in the field of intravenous delivery of therapeutic fluids to a subject (e.g., a patient), it is necessary to ensure that the fluid delivered to the subject is free of particulate contaminants.

Traditionally, intravenous therapy devices may include a fluid reservoir containing a therapeutic fluid, for example, physiological saline, which may or may not contain a pharmaceutically active substance. The external intravenous catheter may be fluidly connected to the intravenous therapy device. The external venous catheter may lead to an injection site of the subject, for example, a needle injection site including a venous indwelling needle into a blood vessel of the subject. Therapeutic fluid may flow from the fluid reservoir, through an external intravenous catheter, and into a blood vessel of the subject at the needle injection site.

Any pathogenic and/or particulate contaminants entrained in the therapeutic fluid stream may enter the subject at the needle injection site, potentially causing physiological harm to the subject.

Disclosure of Invention

Intravenous therapy devices and related components including at least one filter that is isolated from a therapeutic liquid prior to use of the intravenous therapy device are disclosed.

An intravenous device includes a fluid reservoir for containing a therapeutic fluid and a filter assembly including a fluid inlet end connected to a connection portion of the fluid reservoir port extending through a wall of the fluid reservoir and an outlet end including a seal covering the outlet end of the filter assembly.

Also disclosed is an intravenous device comprising a liquid reservoir comprising a first portion configured to initially contain a therapeutic liquid, a second portion configured to initially isolate the therapeutic liquid, a removable barrier initially isolating the first portion from the second portion, and a filter within the second portion, the filter being fluidly connected to a port extending through a wall of the liquid reservoir.

The invention further discloses an intravenous device comprising a liquid reservoir for containing a therapeutic liquid and a filter assembly comprising a liquid inlet end connected to a connection portion of the liquid reservoir interface through the liquid reservoir wall and a piercing tip at the inlet end for piercing a seal between the liquid reservoir and the connection interface.

The present invention also discloses a method of using an intravenous injection device, the method comprising: providing a fluid reservoir at least partially containing a therapeutic fluid; providing a liquid filter connected to the liquid reservoir, the liquid filter being initially sealed from contact with the therapeutic liquid; connecting an external intravenous catheter to an outlet of the liquid filter; removing the initial seal that prevents the liquid filter from contacting the therapeutic liquid; and directing a flow of therapeutic liquid from the liquid reservoir to an inlet of the liquid filter.

Drawings

Fig. 1 shows a perspective view of an intravenous therapy device as described herein.

Fig. 2 shows an enlarged cross-sectional view of a portion of the intravenous therapy device shown in fig. 1.

Fig. 3 shows a perspective view of the intravenous therapy device described herein.

Figure 4 shows a side view of the intravenous treatment apparatus shown in figure 3.

Fig. 5 shows an enlarged side view of the intravenous therapy device described herein.

Figure 6 shows a side view of the intravenous therapy device described herein.

Figure 7 shows a cross-sectional view of a portion of the intravenous treatment apparatus shown in figure 6.

Figure 8 shows a cross-sectional view of the intravenous therapy device described herein.

Figure 9 shows a cross-sectional view of an intravenous therapy device as described herein.

Detailed Description

Generally, the intravenous therapy devices described herein are used to supply a flow of therapeutic fluid (e.g., saline with or without a pharmaceutically active substance) to a subject. The intravenous therapy devices described herein include a filter assembly through which the liquid flows prior to being introduced into the subject. The filter may partially or completely remove foreign matter (e.g., particulates) from the liquid stream.

In some embodiments, the intravenous therapy device includes a liquid reservoir at least partially containing a therapeutic liquid. The intravenous therapy device also includes a liquid filtration assembly to be connected to the liquid reservoir. The filter assembly may include a filter housing and a filter element positioned within the filter housing. The filter assembly is initially sealed from contact with the therapeutic liquid. In other words, the therapeutic liquid is prevented from contacting the filter assembly prior to use of the intravenous therapy device.

The intravenous therapy device may include one or more interfaces that deliver fluid to a subject and receive fluid to be added to the fluid reservoir. The filter assembly may be connected to the intravenous therapy device at a connection portion of the one or more interfaces. In one embodiment, the central port includes an outlet tube into which an inlet tube of a filter housing of the filter assembly is inserted in a substantially fluid-tight manner. The inlet tube of the filter housing may include a portion configured to pierce a seal or membrane of the intravenous therapy device (e.g., a seal of the fluid reservoir and/or a seal of the filter housing). For example, the filter housing may include a large protruding portion, such as a spike. In other embodiments, the piercing portion or needle is located on another component of the intravenous therapy device to which the filter housing is attached on the underside (downtreamside) of the component. A removable stop (e.g., a ring) may be located on the inlet tube of the filter housing to prevent the inlet tube from being fully inserted into the outlet tube of the central hub.

A membrane seal may be located within the central interface preventing the filter assembly from contacting the therapeutic liquid in the liquid reservoir. When an operator wants to use the intravenous therapy device, the operator inserts an external intravenous catheter into the outlet of the filter assembly and moves the ring. The operator inserts the inlet tube of the filter housing fully into the outlet tube of the central port so that the piercing portion or needle pierces the membrane seal. The therapeutic fluid then flows through the filter assembly into an external intravenous catheter through which it is passed to an injection site (e.g., a needle injection site on a subject).

In some embodiments, the liquid filter includes a seal at one or more ends of the liquid filter (e.g., the outlet end of the liquid filter). The seal prevents liquid from initially flowing through the liquid filter and/or prevents external contaminants (e.g., dust, airborne pathogens) from entering the filter prior to use. The seal is broken (e.g., removed) when the intravenous therapy device is used (e.g., by inserting a portion of the external intravenous catheter into the outlet of the liquid filter).

In other embodiments, the filter assembly is connected to the liquid reservoir by, for example, a hose (flexible tube). The filter assembly may be fixedly attached to the hose, for example, by an adhesive, or may be removably attached to the hose, for example, by a connector (e.g., a luer connection). The hose may be provided with a removable clamp (clamp). The clamp may be configured to squeeze the hose such that the internal passageway of the hose is closed, preventing the therapeutic liquid from contacting the filter assembly.

During use, the operator inserts a portion of the external intravenous catheter into the outlet of the liquid filter. Subsequently, the operator removes the clamp from the hose, thereby allowing the therapeutic liquid to flow through the filter assembly, into the external intravenous catheter, and ultimately to the injection site (e.g., a needle injection site on the subject).

In some embodiments, the liquid reservoir may be initially divided into a liquid containing portion containing the therapeutic liquid and a dry portion. The filter assembly is located within the dry portion of the liquid reservoir and is initially isolated from the therapeutic liquid. The filter assembly may be connected to a port extending through a wall of the fluid reservoir.

The liquid reservoir may be made of an elastic polymeric material. The liquid reservoir may be separated by a clamping bar (bar clamp) that spans the liquid reservoir and clamps (e.g., lux) the liquid reservoir walls together to isolate the dry and liquid portions of the liquid reservoir. During use, an operator or health care provider may attach (e.g., insert) a portion of the external intravenous catheter into the interface and remove the retaining strip, thereby allowing the therapeutic liquid to fill both the initial liquid-containing portion and the initial dry portion. The therapeutic fluid may saturate and flow through the filter assembly, into the external intravenous catheter, and ultimately to the needle injection site.

Fig. 1 shows a perspective view of an intravenous therapy device 100. The intravenous therapy device 100 includes a fluid reservoir 102 containing a therapeutic fluid (e.g., saline). The liquid reservoir 102 comprises a resilient, substantially non-porous polymeric material. As one non-limiting example, the liquid reservoir 102 is comprised of two sheets (sheets) of an elastic polymeric material sealed (e.g., bonded) together along an outer perimeter. In other embodiments, the liquid reservoir 102 is substantially comprised of a rigid material, such as high density polyethylene or other polymeric material. Prior to use of the intravenous therapy device 100, a portion of the liquid reservoir 102 containing the therapeutic liquid may be substantially hermetically sealed to prevent ingress of air or external contaminants, as well as to prevent leakage of the liquid in the liquid reservoir 102.

The intravenous therapy device 100 contains one or more ports formed on the fluid reservoir 102. For example, the intravenous therapy device 100 contains at least a central interface 104 and one or more auxiliary interfaces 106. During use, fluid flow exits the fluid reservoir 102 through one or more of the central port 104 and the auxiliary port 106. In some embodiments, a substance (e.g., a pharmaceutically active substance) is injected into the liquid reservoir 102 through at least one of the central port 104 and the auxiliary port 106. For example, one of the ancillary interfaces 106 includes a needle hub and/or a needleless connection port (e.g., luer 107) to which an operator connects a substance filled syringe (not shown). The operator then injects the substance from the syringe into the liquid in the liquid reservoir 102 through the auxiliary interface 106.

The intravenous therapy device 100 includes one or more fluid filter assemblies 108 for connection to the fluid reservoir 102. The filter assembly 108 includes a filter element 110 (fig. 2) located within a filter housing 112. The filter element 110 may be comprised of a filter media, such as a woven fabric or a fiber or other porous material that is entangled. As the liquid flows from the liquid reservoir 102, through the filter element 110, through an external venous catheter (not shown) to an injection site (also not shown), the pore size of the filter medium is selected to impede (e.g., intercept) the passage of particles of a certain size.

As shown, the filter assembly 108 is located outside of the liquid reservoir 102 in a gas-tight seal prior to use of the intravenous therapy device 100. In other words, the filter assembly 108 is isolated from the liquid in the liquid reservoir 102 prior to use of the intravenous therapy device 100. In some embodiments, the filter assembly 108 includes a seal 120 on one or more ends of the filter assembly 108. The seal prevents fluid from initially flowing through the filter assembly 108 and/or isolates the filter assembly 108 from external contaminants prior to use of the intravenous therapy device 100. For example, as shown in FIG. 1, the seal 120 is located on the outlet end 115 of the filter housing 112. The seal 120 may be a thin, resilient material (e.g., a polymeric film or a metal foil) that can be ruptured by piercing with a piercing element or tool (e.g., a piercing needle). In other embodiments, the seal 120 is a cover (e.g., a lid) that can be removed from the outlet end 115 of the filter housing 112 when in use.

The filter component 108 is connected to a connection portion of an interface (e.g., the center interface 104 or the auxiliary interface 106). As shown in fig. 1, the filter assembly 108 is located near the central interface 104 of the liquid reservoir 102. The central interface 104 includes an outlet tube 114 connected to the liquid reservoir 102 and extending from the liquid reservoir 102. The inlet end 113 of the filter housing 112 of the filter assembly 108 includes an inlet tube 116. The inlet tube 116 is shaped and sized to mate with the outlet tube 114 of the central interface 104. For example, the inlet tube 116 and the outlet tube 114 are sized such that when the inlet tube 116 is inserted into the outlet tube 114, a substantially liquid tight seal can be created between the inlet tube 116 and the outlet 114. By way of non-limiting example, as shown in FIG. 1, the inlet tube 116 is substantially cylindrical and the outlet tube 114 defines a substantially cylindrical bore into which the inlet tube 116 may be inserted.

In some embodiments, the inlet tube 116 is prevented from being fully inserted into the outlet tube 114 prior to use of the intravenous therapy device 100. For example, in the embodiment shown in FIG. 1, the removable ring 118 is initially positioned on the inlet tube 116 such that the ring 118 is in close proximity to the outlet tube 114 and the filter housing 112 such that the inlet tube 116 is only partially inserted into the outlet tube 114. The ring 118 includes a resilient (e.g., stretchable) clip or strap that surrounds a portion of the inlet tube 116. In some embodiments, the ring 118 may be integral with the outlet tube 114 or the inlet tube 116 and configured to be relatively easily broken off from the outlet tube 114 or the inlet tube 116.

Figure 2 shows a cross-sectional view of the intravenous treatment apparatus embodiment shown in figure 1. As shown in FIG. 2, the inlet tube 116 of the housing 112 of the filter assembly 108 terminates at a piercing element, such as a substantially protruding portion (e.g., a piercing needle 202). The central interface 104 includes a sealing membrane 204 located between the liquid reservoir 102 and the outlet tube 114. When the intravenous therapy apparatus 100 is ready for use, the operator inserts a tool, such as a drip chamber (e.g., drip chamber 400 (fig. 3 and 4)), coupled to an external intravenous line (not shown) into the outlet end 115 of the filter housing 112 to break the seal 120. The operator removes the ring 118 (fig. 1) and fully inserts the filter assembly 108 such that the inlet tube 116 is fully inserted into the outlet tube 114. As the inlet tube 116 further enters the outlet tube 114, the piercing needle 202 pierces the sealing membrane 204, causing fluid from the fluid reservoir 102 to flow through the inlet tube 116 and into the filter housing 112. Fluid may flow into the outer diameter 206 of the filter element 110, through the filter element 110, into the inner diameter 208 of the filter element 110, from the outlet end 115 of the filter housing 112 into an external intravenous catheter, to a needle injection site on a subject. In other embodiments, the filter housing 112 is inserted into the liquid reservoir 102 prior to attaching a tool (e.g., a drip chamber) to the filter housing 112.

Fig. 3 shows one embodiment of an intravenous therapy device 300. As shown, the intravenous therapy device 300 includes a filter assembly 108 coupled to the auxiliary interface 106 of the fluid reservoir 102. In the embodiment of fig. 3, the connection portion of the auxiliary interface 106 includes a hose 302 extending from the auxiliary interface 106 to the filter assembly 108. The filter assembly 108 is connected to the hose 302 by, for example, a detachable mechanical connection (e.g., a luer fitting). In other embodiments, the filter assembly 108 is fixedly connected to the hose 302 by a chemical connection (e.g., an adhesive). The intravenous therapy device 300 includes a clamp 304 on a flexible tube 302.

Fig. 4 shows an enlarged side view of the embodiment of the intravenous treatment apparatus shown in fig. 3. The clamp 304 includes a clamp member 306 configured to clamp (e.g., pinch) the hose 302, when the clamp 304 is in a closed state, closing off an internal passage of the hose 302, thereby preventing fluid flow through the hose 302, isolating the filter assembly 108 from fluid in the fluid reservoir 102.

When the intravenous therapy apparatus 300 is ready for use, an operator removes (e.g., pierces) the seal 120 from the outlet end 115 of the filter assembly 108 and connects an external intravenous catheter (e.g., connects the external intravenous catheter to a drip chamber 400 having a piercing tip) as described above in connection with fig. 2. The operator then opens the clamp 304, allowing fluid to flow from the fluid reservoir 102, through the hose 302, into the filter assembly 108, into the external venous catheter, and ultimately to an injection site (e.g., a needle injection site on a subject).

Fig. 5 shows a side view of an intravenous therapy device 500. In this embodiment, the liquid reservoir 502 is initially divided into a substantially liquid filled portion 504 and an empty dry portion 506. The filter assembly 508 is located within the dry portion 506 of the liquid reservoir 502 and is initially protected from contact with fluid in the liquid-loading portion 504 of the liquid reservoir 502. In this embodiment, the liquid reservoir 502 may be made of a resilient, substantially porous material, such as a polymer. As shown in fig. 5, in this embodiment, the liquid reservoir 502 is divided into a liquid containing portion 504 and a dry portion 506 by a removable barrier (e.g., a clamping strip 510) that extends through the liquid reservoir 502. The clamping bar 510 clamps (e.g., pinches) the two resilient outer walls of the liquid reservoir 502 together to prevent liquid in the liquid containing portion 504 from entering the dry portion 506, thereby preventing liquid from contacting the filter assembly 508 prior to use.

The filter assembly 508 is connected to a tube 512 that extends through the outer wall of the liquid reservoir 502. The outlet 514 of the tube 512 is protected by a seal (e.g., a membrane or cover) as described above in connection with the outlet end 115 of the filter assembly 108 to prevent liquid from initially flowing through the liquid filter and/or to prevent external contaminants from entering the tube 512 and the filter assembly 508.

When the intravenous therapy apparatus 500 is ready for use, the operator removes the seal from the outlet 514, connects an external intravenous line (not shown) between the outlet 514 and the injection site of the subject, and removes an obstruction (e.g., the grip strip 510) from the fluid reservoir, thereby eliminating the space between the fluid-containing portion 504 and the dry 506 of the fluid reservoir. Thus, liquid is allowed to enter the entire liquid reservoir, including the previously dry portion 506, soak and flow through the filter assembly 508, through the outlet 514, through the external venous catheter and into the injection site of the subject.

In other embodiments, liquid reservoir 502 is initially divided into a liquid containing portion 504 and a dry portion 506 by a frangible seal. For example, a frangible membrane located within the liquid reservoir 502 divides the reservoir 502 into a liquid containing portion 504 and a dry portion 506. When necessary, the frangible membrane is broken by the operator, for example, by squeezing the liquid reservoir 502. In some embodiments, the liquid reservoir is comprised of two sheets of polymeric material bonded together along an outer periphery. The seal between the two sheets of material extends from the outer perimeter of one side of the liquid reservoir to the outer perimeter of the other side of the liquid reservoir, dividing the reservoir into a liquid containing portion 504 and a dry portion 506. If desired, the seal extending between the outer peripheries is configured to be easily broken by an operator (e.g., more easily than the adhesive surrounding the outer peripheries), for example, by squeezing the liquid containing portion 504 of the liquid reservoir 502 or tearing the two pieces of material apart in the vicinity of the seal.

Fig. 6 shows a side view of an intravenous therapy device 600. In this embodiment, the fluid reservoir 602 includes an interface 604 having a coupling sleeve 606. The inlet end 608 of the filter assembly 610 is connected to a coupling ring 612, and the coupling ring 612 is configured to mechanically couple to the adapter sleeve 606. The connection ring 612 may also include one or more auxiliary interfaces 609.

Fig. 7 shows an enlarged cross-sectional view of the intravenous therapy apparatus 600 shown in fig. 6. The connection sleeve 606 includes connection features (e.g., threads 614) configured to interact with connection features (e.g., threads 616) located on the connection ring 612. The inlet end 608 (fig. 6) of the filter assembly 610 may also include one or more piercing elements (e.g., piercing needle 618) at least partially disposed within the connector ring 612. One or more of the puncture needles 618 are fluidly connected to the filter assembly 610 via, for example, tubing 622. For example, one spike 618 may be fluidly connected to the filter assembly 610, and another spike 618 may be fluidly connected to one or more auxiliary ports 609.

One or more puncture needles 618 are positioned on or through a carrier 624. The connector ring 612 is free to rotate relative to the carrier 624 or the piercing needle 618.

When the operator is ready to use the intravenous treatment apparatus 600, the operator places the connection ring 612 onto the connection sleeve 606 and rotates the connection sleeve 606 relative to the connection ring 612 such that the threads (thread)614 engage the threads 616. When the

threads

614 and 616 are engaged, the connector ring 612 and the one or more piercing needles 618 are pulled in a direction toward the fluid reservoir 602, the one or more piercing needles 618 pierce a seal 626 located above one or more connection portions of the interface 604 (e.g., an opening 628 located in an endplate 630), and the one or more piercing needles 618 enter the fluid reservoir 602 such that the fluid reservoir 602 is in fluid communication with the filter assembly 610 via the tube 622, and one or more portions of the connection sleeve 606 are configured to form a fluid seal against the piercing needles 618 to prevent leakage. For example, one or more endplates (end plates), a septum within an opening 628 formed in endplate 630, and a seal 626 (e.g., a membrane) are provided to form a fluid-tight seal against the piercing needle 618 to prevent leakage. The operator inserts a portion of an external intravenous catheter, such as drip chamber 400 (fig. 6), into outlet end 632 of filter assembly 610, as described above in connection with fig. 2. The outlet end 632 of the filter assembly 610 includes a seal substantially as described above in connection with fig. 2.

Fig. 8 shows an enlarged cross-sectional view of an embodiment of an intravenous treatment apparatus 800. In the embodiment shown in FIG. 8, the coupling sleeve 806 includes a substantially annular retainer (e.g., snap ring 802) located on an outer diameter 804 of the coupling sleeve 806. The snap ring 802 is configured to interact with an annular protrusion (e.g., lip 808) located on an inner diameter 810 of the attachment ring 812. For example, the operator places the attachment ring 812 over the connection sleeve 806 while pressing the two portions until the edge 808 passes the snap ring 802, and the mechanical interaction between the edge 808 and the snap ring 802 holds the attachment ring 812 over the connection sleeve 806. When the connection ring 812 and the connection sleeve 806 are simultaneously depressed, a puncture needle 628 connected to the inlet end 608 (FIG. 6) of the filter assembly 610 pierces the seal 626 and enters the fluid reservoir 602.

Fig. 9 shows an enlarged cross-sectional view of an embodiment of an intravenous treatment apparatus 900. In the embodiment shown in FIG. 9, the filter assembly 902 is positioned within the attachment ring 906. The attachment ring 906 includes one or more attachment features, such as a lip 808 that engages the snap ring 802 on the attachment sleeve 912 or a threaded attachment (thread) as discussed above in connection with FIG. 6 or FIG. 7.

The filter assembly 902 includes a filter housing 904 surrounding a filter element 908. The filter housing 904 includes an inlet portion 914 with a piercing element (e.g., piercing needle 910) extending therefrom. Coupling ring 906 is coupled to coupling sleeve 902. For example, as described above in connection with FIG. 8, the attachment ring 906 is placed over the attachment sleeve 902 while the two portions are pressed until the edge 808 engages the snap ring 802. As these components are moved together, the piercing needle 910 pierces the seal 626 and enters the fluid reservoir 602, thereby allowing fluid to flow out of the reservoir 602 and into the filter assembly 902. The filter assembly 902 includes an outlet 914 covered by a seal 916. When a portion of an external intravenous catheter, such as a drip chamber containing a piercing needle (fig. 6), is inserted into the outlet 914 of the filter assembly 902, the seal 916 is pierced.

Once the instant vein treatment device is disclosed, one of ordinary skill in the art will readily prepare and assemble the device.

Claims

1. An intravenous therapy device, comprising:

a liquid reservoir comprising a first portion configured to initially contain a therapeutic liquid and a second portion configured to initially be isolated from the therapeutic liquid;

a removable barrier initially isolating the first and second portions; and

an auxiliary interface disposed on an outer wall of the second portion and communicating with an interior of the second portion; and

an outlet tube extending into the second portion and through a central interface in a wall of the liquid reservoir; and

a filter assembly located within the second portion, the filter assembly including a filter housing and a filter element located within the filter housing, the filter housing including an inlet end and an outlet end;

the outlet end is fluidly connected to the outlet tube, the filter housing and the outlet tube are connected in an inverted L-shape, and the filter housing is disposed with its axial direction perpendicular to the direction of the therapeutic liquid from the first portion into the second portion;

the inlet end communicates with the second portion, the inlet end allowing the therapeutic liquid to enter the filter assembly in an axial direction of the filter housing.

2. The intravenous therapy apparatus of claim 1, wherein:

the interior of the central interface is provided with a seal between the liquid reservoir and the outlet tube.

3. The intravenous therapy apparatus of claim 1 or 2, wherein:

the liquid reservoir is made of an elastic polymeric material.

4. The intravenous therapy apparatus of claim 3, wherein:

the removable barrier is a clamping bar.

5. The intravenous therapy apparatus of claim 1 or 2, wherein:

the removable barrier is a frangible membrane.

6. The intravenous therapy apparatus of claim 1 or 2, wherein:

the liquid reservoir is comprised of two sheets of polymeric material bonded together along an outer periphery, a seal between the two sheets of material extending from the outer periphery of one side of the liquid reservoir to the outer periphery of the other side of the liquid reservoir, dividing the liquid reservoir into the first portion and the second portion, the seal extending between the outer peripheries being configured to be more easily broken than the adhesive around the outer peripheries.