Patent Description:
One treatment for male erectile dysfunction is the implantation of a penile prosthesis that mechanically erects the penis. Some existing penile prostheses include inflatable cylinders or members that can be inflated or deflated using a pump mechanism. In some existing devices, the inflatable cylinder or member requires a relatively large amount of force to inflate. Additionally, in some existing devices, the pump mechanism may require many sequential squeezes or activations to inflate the cylinder or member.

Document <CIT> discloses a penile prosthesis, which includes a generally cylindrical body portion comprising a cavity with an inner wall, a proximal end, a distal end, and at least one volume-displacing member occupying at least a portion of the cavity, wherein the at least one volume-displacing member is smaller in at least one dimension than the dimensions of the cavity to provide an internal chamber at least partially surrounding the at least one volume-displacing member and adjacent to the inner wall of the cavity.

Document <CIT> discloses a penile prosthesis device containing one or more inflatable tubular sacks for enabling an erectile function of the penis. These are covered by a shaped body. Integral with the tubular sack is a base which is sutured to the pubic bone.

Document <CIT> discloses an implantable inflatable penile prosthesis cylinder including an outer tube member having a longitudinal axis, an inner tube member contained within the outer tube member, and one or more tensile support members within the inner tube member. The inner tube member includes at least one inflatable chamber section, at least a portion of which is defined by a wall of the inner tube member. The one or more tensile support members extend between interior surfaces of the wall, and are placed in tension when the at least one chamber section is in an inflated state.

Document <CIT> discloses an implantable penile prosthesis cylinder comprising an outer tube member and an inner tube member. The outer tube member has a longitudinal axis. The inner tube member is contained within the outer tube member. The inner tube member includes a plurality of inflatable chamber sections each defined by an exterior wall facing the outer tube member and an interior wall. Inflation of the chamber sections expands a girth of the outer tube member.

Document <CIT> discloses an inflatable penile prosthesis including an inflatable member, the inflatable member having a reinforced portion; a reservoir configured to hold fluid; and a pump assembly configured to facilitate a transfer of the fluid from the reservoir to the inflatable member when the prosthesis is in an inflation mode, and facilitate a transfer of the fluid from the inflatable member to the reservoir when the prosthesis is in a deflation mode.

Accordingly, it would be useful to provide a bodily implant, such as a penile prosthesis that includes an improved cylinder or member that can be more easily inflated.

According to an aspect, an inflatable implant includes a fluid reservoir configured to hold fluid; an inflatable member; and a pump assembly configured to transfer fluid from the fluid reservoir to the inflatable member, the inflatable member including a body member and a core member, the body member defining a first cavity and a second cavity, the core member being disposed within the first cavity, the second cavity being configured to receive the fluid.

In some embodiments, the body member has a first softness, the core member has a second softness, the first softness being different than the second softness. In some embodiments, the body member has a first softness, the core member has second softness, the second softness being greater than the first softness.

In some embodiments, the first cavity is fluidically isolated from the second cavity. In some embodiments, the inflatable member has a first end portion and second end portion, the second cavity extends from a location proximate the first end portion to a location proximate the second end portion. In some embodiments, the first cavity extends in a first direction, the second cavity extends in a second direction, the first direction is substantially parallel to the second direction.

In some embodiments, the core member is a first core member, the body member defines a third cavity and a fourth cavity, the body member includes a second core member, the second core member being disposed within the third cavity, the fourth cavity being configured to receive the fluid. In some embodiments, the core member is a first core member, the body member defines a third cavity and a fourth cavity, the body member includes a second core member, the second core member being disposed within the third cavity, the fourth cavity being configured to receive the fluid, the first cavity extends substantially parallel to the second cavity, the third cavity, and the fourth cavity.

In some embodiments, the inflatable member is an elongate member. In some embodiments, the first cavity has a substantially circular cross-sectional shape. In some embodiments, the first cavity has an elongated cross-sectional shape. In some embodiments, the first cavity has an elongated and curved cross-sectional shape, the second cavity has a circular cross-sectional shape.

In some embodiments, the inflatable member defines a longitudinal axis, the first cavity being aligned along the longitudinal axis, the second cavity being offset from the longitudinal axis. In some embodiments, the inflatable member defines a longitudinal axis, the second cavity being aligned along the longitudinal axis, the first cavity being offset from the longitudinal axis.

In some embodiments, the core member is a first core member, the body member defines a third cavity, the body member includes a second core member, the second core member being disposed within the third cavity. In some embodiments, the body member defines a third cavity, the third cavity being configured to receive the fluid.

According to another aspect, an inflatable implant includes a fluid reservoir configured to hold fluid; an inflatable member; and a pump assembly configured to transfer fluid from the fluid reservoir to the inflatable member, the inflatable member including a body member and a core member, the body member defining a plurality of cavities configured to receive the fluid, the core member being softer than the body member.

In some embodiments, the core member extends in a first direction, a first of the plurality of cavities extends in a second direction, the first direction being substantially parallel to the second direction.

According to another aspect, an inflatable implant includes a fluid reservoir configured to hold fluid; an inflatable member; and a pump assembly configured to transfer fluid from the fluid reservoir to the inflatable member, the inflatable member including a body member and a core member, the body member defining a cavity, the core member being disposed within the cavity of the body member, the core member defining a cavity, the cavity of the core member being configured to receive the fluid.

In some embodiments, the cavity of the body member is configured to receive the fluid.

Detailed embodiments are disclosed herein. However, it is understood that the disclosed embodiments are merely examples, which may be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the embodiments in virtually any appropriately detailed structure. Further, the terms and phrases used herein are not intended to be limiting, but to provide an understandable description of the present disclosure.

The terms "a" or "an," as used herein, are defined as one or more than one. The term "another," as used herein, is defined as at least a second or more. The terms "including" and/or "having", as used herein, are defined as comprising (i.e., open transition). The term "coupled" or "moveably coupled," as used herein, is defined as connected, although not necessarily directly and mechanically.

In general, the embodiments are directed to bodily implants. For example, in some embodiments, the bodily implant is configured to be disposed within a pelvic region of a patient. For example, the bodily implant may be a penile implant. In other embodiments, the implant is configured to be disposed within a different portion of the body of the patient. The term patient or user may hereafter be used for a person who benefits from the medical device or the methods disclosed in the present disclosure. For example, the patient can be a person whose body is implanted with the medical device.

<FIG> schematically illustrates a bodily implant <NUM>. In the illustrated embodiment, the implant is an inflatable bodily implant. The bodily implant includes a fluid reservoir <NUM>, an inflatable member <NUM>, and a pump assembly <NUM>. The fluid reservoir <NUM> is operatively coupled to the pump assembly <NUM> and the pump assembly <NUM> is operatively coupled to the inflatable member <NUM>. The pump assembly <NUM> is configured to transfer fluid between the fluid reservoir <NUM> and the inflatable member <NUM> according to an aspect.

In some embodiments, the implant <NUM> is a penile implant. In some such embodiments, the inflatable member <NUM> may be implanted into the corpus cavemosae of the user, the fluid reservoir <NUM> may be implanted in the abdomen or pelvic cavity of the user (e.g., the fluid reservoir <NUM> may be implanted in the lower portion of the user's abdominal cavity or the upper portion of the user's pelvic cavity), and the pump assembly <NUM> may be implanted in the scrotum of the user.

The pump assembly <NUM> includes a pump bulb <NUM> and an actuator or a deflation mode actuator <NUM>. In an inflation mode, the user may operate the pump bulb <NUM> (e.g., squeeze the pump bulb <NUM>, release, then squeeze again, etc.) to transfer fluid from the fluid reservoir <NUM> to the pump assembly <NUM>, and from the pump assembly <NUM> to the inflatable member <NUM> such that a desired rigidity is achieved in the inflatable member <NUM>. In order to deflate the inflatable member <NUM>, the user may locate the deflation mode actuator <NUM>, and activate the deflation mode actuator <NUM> to place the implant <NUM> in a deflation mode.

In some embodiments, the deflation mode actuator <NUM> is movably coupled to a pump assembly or a valve body. In some examples, the deflation mode actuator <NUM> includes a protrusion, that when pressed, causes the valve body to define a fluid passageway from the inflatable member <NUM> to the fluid reservoir <NUM> in order to deflate the inflatable member <NUM>. In some examples, the deflation mode actuator <NUM> includes a push rod or button. In some examples, the user presses the deflation mode actuator <NUM> once (e.g., does not need to hold the deflation mode actuator <NUM>) to cause fluid to drain from the inflatable member <NUM>.

The pump bulb <NUM> may be a flexible member defining a cavity. In some embodiments, the pump bulb <NUM> is coupled to and extends from the valve body. The pump bulb <NUM> may be a squeeze pump. The pump bulb <NUM> may use suction and pressure to move the fluid in and out of the cavity of the pump bulb <NUM> in the inflation mode. For example, the user may depress or squeeze the pump bulb <NUM> to expel the fluid out of the cavity, and, when the flexible member returns to its original shape, the resulting suction pushes the fluid into the cavity of the pump bulb <NUM>. In some examples, the pump bulb <NUM> may have a bulb spring rate that is designed to refill the pump bulb <NUM> in a selected time frame.

In the illustrated embodiment, the inflatable member <NUM> includes a body member <NUM> and a core member <NUM>. The body member <NUM> includes or defines a first cavity <NUM> and a second cavity <NUM>. In some embodiments, the core member <NUM> is disposed within the first cavity <NUM>. The second cavity <NUM> is configured to receive the fluid. For example, in some embodiments, in the inflation mode, the pump bulb <NUM> may be activated or squeezed to transfer the fluid to the second cavity <NUM> of the body member <NUM> to inflate the inflatable member <NUM>.

In some embodiments, the core member <NUM> has a softness that is greater than the softness of the body member <NUM>. In other words, the core member <NUM> is softer or more flexible than the body member <NUM>. For example, in some embodiments, the core member <NUM> may be of a durometer that is lower (or softer, or more flexible) than the durometer of the body member <NUM>. In some embodiments, core member <NUM> is formed of a material that is softer than the material that forms the body member <NUM>. In other embodiments, the core member <NUM> is formed of the same material as the body member <NUM>.

In some embodiments, the inflatable member <NUM> includes more than one core member. For example, in some embodiments, the inflatable member <NUM> includes two, three, four, or more core members.

In some embodiments, the first cavity <NUM> is separate or disposed apart from the second cavity <NUM>. In some embodiments, the first cavity <NUM> is fluidically isolated from the second cavity <NUM>.

In some embodiments, the combination of the body member <NUM> and the core member <NUM> allow or help facilitate the inflation of the inflatable member. For example, in some embodiments, the user may inflate the inflatable member by actuating the pump bulb fewer times. Additionally, in some embodiments, the body member and the core member may help retain the inflatable member in a cylindrical shape when the inflatable member is in its deflated configuration (rather than a flat or semi-planar shape).

<FIG> illustrates an inflatable penile prosthesis or implant <NUM> having a pump assembly <NUM> according to an aspect. The penile prosthesis <NUM> may include a pair of inflatable cylinders <NUM>, and the inflatable cylinders <NUM> are configured to be implanted in a penis of the patient. For example, one of the inflatable cylinders <NUM> may be disposed on one side of the penis, and the other inflatable cylinder <NUM> may be disposed on the other side of the penis. Each inflatable cylinder <NUM> may include a first end portion <NUM>, a cavity or inflation chamber <NUM>, and a second end portion <NUM> having a rear tip <NUM>.

The pump assembly <NUM> may be implanted into the patient's scrotum. A pair of conduit connectors <NUM> may attach the pump assembly <NUM> to the inflatable cylinders <NUM> such that the pump assembly <NUM> is in fluid communication with the inflatable cylinders <NUM>. Also, the pump assembly <NUM> may be in fluid communication with a fluid reservoir <NUM> via a conduit connector <NUM>. The fluid reservoir <NUM> may be implanted into the user's abdomen. The inflation chamber or portion <NUM> of the inflatable cylinder <NUM> may be disposed within the penis. The first end portion <NUM> of the inflatable cylinder <NUM> may be at least partially disposed within the crown portion of the penis. The second end portion <NUM> may be implanted into the patient's pubic region with the rear tip <NUM> proximate the pubic bone.

In order to implant the inflatable cylinders <NUM>, the surgeon may first prepare the patient. The surgeon often makes an incision in the penoscrotal region, e.g., where the base of the penis meets with the top of the scrotum. From the penoscrotal incision, the surgeon may dilate the patient's corpus cavemosae to prepare the patient to receive the inflatable cylinders <NUM>. The corpus cavemosum is one of two parallel columns of erectile tissue forming the dorsal part of the body of the penis, e.g., two slender columns that extend substantially the length of the penis. The surgeon will also dilate two regions of the pubic area to prepare the patient to receive the second end portion <NUM>. The surgeon may measure the length of the corpora cavernosae from the incision and the dilated region of the pubic area to determine an appropriate size of the inflatable cylinders <NUM> to implant.

After the patient is prepared, the penile prosthesis <NUM> is implanted into the patient. The tip of the first end portion <NUM> of each inflatable cylinder <NUM> may be attached to a suture. The other end of the suture may be attached to a needle member (e.g., Keith needle). The needle member is inserted into the incision and into the dilated corpus cavemosum. The needle member is then forced through the crown of the penis. The surgeon tugs on the suture to pull the inflatable cylinder <NUM> into the corpus cavemosum. This is done for each inflatable cylinder <NUM> of the pair. Once the inflation chamber <NUM> is in place, the surgeon may remove the suture from the tip. The surgeon then inserts the second end portion <NUM>. The surgeon inserts the rear end of the inflatable cylinder <NUM> into the incision and forces the second end portion <NUM> toward the pubic bone until each inflatable cylinder <NUM> is in place.

A pump bulb <NUM> of the pump assembly <NUM> may be squeezed or depressed by the user in order to facilitate the transfer of fluid from the fluid reservoir <NUM> to the inflatable cylinders <NUM>. For example, in the inflation mode, while the user is operating the pump bulb <NUM>, the pump bulb <NUM> may receive the fluid from the fluid reservoir <NUM>, and then output the fluid to the inflatable cylinders <NUM>. When the user switches to the deflation mode, at least some of the fluid can automatically be transferred back to the fluid reservoir <NUM> (due to the difference in pressure from the inflatable cylinders <NUM> to the fluid reservoir <NUM>). Then, the user may squeeze the inflatable cylinders <NUM> to facilitate the further transfer of fluid through the pump bulb <NUM> to the fluid reservoir <NUM>.

In the illustrated embodiment, the pump assembly <NUM> includes an actuation member <NUM>. The actuation member <NUM> may be used by the patient to toggle or switch the penile implant <NUM> from its inflate mode to its deflate mode.

<FIG> is a cross-sectional view of the inflatable cylinder or member <NUM> taken along line A-A of <FIG>. In the illustrated embodiment, the inflatable member <NUM> includes a body member <NUM> and core members <NUM>, <NUM>, and <NUM>. The body member <NUM> includes or defines a first cavity <NUM>, a second cavity <NUM>, a third cavity <NUM>, and a fourth cavity <NUM>. The core members <NUM>, <NUM>, and <NUM> are disposed in the second, third, and fourth cavities. The first cavity <NUM> is configured to receive the fluid. For example, in some embodiments, in the inflation mode, the pump bulb <NUM> may be activated or squeezed to transfer the fluid to the first cavity <NUM> of the body member <NUM> to inflate the inflatable member <NUM>.

The core members <NUM>, <NUM>, and <NUM> have a softness that is greater than the softness of the body member <NUM>. In other words, the core members <NUM>, <NUM>, and <NUM> are softer or more flexible than the body member <NUM>. For example, in some embodiments, the core members <NUM>, <NUM>, <NUM> may be of a durometer that is lower (or softer, or more flexible) than the durometer of the body member <NUM>. In some embodiments, core members are formed of a material that is softer than the material that forms the body member. In other embodiments, the core members are formed of the same material as the body member. For example, in one embodiment, the body member and the core member are formed of a silicone material.

In the illustrated embodiment, the cavities <NUM>, <NUM>, <NUM>, and <NUM> extend along the length of the inflatable member <NUM>. In some embodiments, the cavities <NUM>, <NUM>, <NUM>, and <NUM> extend from a first end portion of the inflatable member <NUM> to a second end portion of the inflatable member <NUM>. In the illustrated embodiment, the cavities are disposed apart from each other. In other words, the cavities <NUM>, <NUM>, <NUM>, and <NUM> are fluidically isolated from each other.

In the illustrated embodiment, the first cavity <NUM> is disposed along the longitudinal axis LA of the body member <NUM>. The other cavities <NUM>, <NUM>, and <NUM> are disposed around the longitudinal axis. In the illustrated embodiment, the first cavity <NUM> has a circular cross-section. The other cavities <NUM>, <NUM>, and <NUM> have elongated and curved cross-sectional shapes.

In some embodiments, the combination of the body member <NUM> and the core members <NUM>, <NUM>, and <NUM> allow or help facilitate the inflation of the inflatable member. For example, in some embodiments, the user may inflate the inflatable member by actuating the pump bulb fewer times. Additionally, the inflatable member may tend towards a cylindrical shape when in the deflated configuration rather than a flat shape.

<FIG> is a cross-sectional view of an inflatable cylinder or member according to an embodiment. In the illustrated embodiment, the inflatable member <NUM> includes a body member <NUM> and a core member <NUM>. The body member <NUM> includes or defines a first cavity <NUM>, a second cavity <NUM>, a third cavity <NUM>, and a fourth cavity <NUM>. The core member <NUM> is disposed in the first cavity <NUM>. The other cavities <NUM>, <NUM>, and <NUM> are configured to receive the fluid. For example, in some embodiments, in the inflation mode, the pump bulb may be activated or squeezed to transfer the fluid to the cavities <NUM>, <NUM>, <NUM> of the body member <NUM> to inflate the inflatable member <NUM>.

The core member <NUM> has a softness that is greater than the softness of the body member <NUM>. In other words, the core member <NUM> is softer or more flexible than the body member <NUM>. For example, in some embodiments, the core member <NUM> may be of a durometer that is greater (or softer, or more flexible) than the durometer of the body member <NUM>. In some embodiments, core member is formed of a material that is softer than the material that forms the body member. In other embodiments, the core member is formed of the same material as the body member. For example, in one embodiment, the body member and the core member are formed of a silicone material.

In some embodiments, the combination of the body member <NUM> and the core member <NUM> allow or help facilitate the inflation of the inflatable member. For example, in some embodiments, the user may inflate the inflatable member by actuating the pump bulb fewer times. Additionally, the inflatable member may tend towards a cylindrical shape when in the deflated configuration rather than a flat shape.

<FIG> is a cross-sectional view of an inflatable cylinder or member <NUM> according to an embodiment. In the illustrated embodiment, the inflatable member <NUM> includes a body member <NUM> and core members <NUM>, <NUM>, <NUM>, and <NUM>. The body member <NUM> includes or defines a plurality of cavities <NUM>. The core members <NUM>, <NUM>, <NUM>, and <NUM> are disposed in some of the cavities. Some of the cavities are configured to receive the fluid. For example, in some embodiments, in the inflation mode, the pump bulb may be activated or squeezed to transfer the fluid to the cavities of the body member <NUM> to inflate the inflatable member <NUM>.

The core members <NUM>, <NUM>, <NUM>, and <NUM> have a softness that is greater than the softness of the body member <NUM>. In other words, the core members <NUM>, <NUM>, <NUM>, and <NUM> are softer or more flexible than the body member <NUM>. For example, in some embodiments, the core members <NUM>, <NUM>, <NUM>, and <NUM> may be of a durometer that is lower (or softer, or more flexible) than the durometer of the body member <NUM>. In some embodiments, core members are formed of a material that is softer than the material that forms the body member. In other embodiments, the core members are formed of the same material as the body member. For example, in one embodiment, the body member and the core member are formed of a silicone material.

In the illustrated embodiment, the cavities <NUM> extend along the length of the inflatable member <NUM>. In some embodiments, the cavities <NUM> extend from a first end portion of the inflatable member <NUM> to a second end portion of the inflatable member <NUM>. In the illustrated embodiment, the cavities are disposed apart from each other. In other words, the cavities <NUM> are fluidically isolated from each other.

In the illustrated embodiment, the one of the cavities is disposed along the longitudinal axis LA of the body member <NUM>. The cavity that is disposed along the longitudinal axis LA is one of the cavities that is configured to receive the fluid. The other cavities are disposed around the longitudinal axis LA. In the illustrated embodiment, cavities have a circular cross-section.

In some embodiments, the combination of the body member <NUM> and the core members allow or help facilitate the inflation of the inflatable member. For example, in some embodiments, the user may inflate the inflatable member by actuating the pump bulb fewer times. Additionally, the inflatable member may tend towards a cylindrical shape when in the deflated configuration rather than a flat shape.

<FIG> is a cross-sectional view of an inflatable cylinder or member <NUM> according to an embodiment. In the illustrated embodiment, the inflatable member <NUM> is similar to inflatable cylinder or member <NUM>, however in this embodiment a core member <NUM> is disposed within the cavity <NUM> that extends along the longitudinal axis LA.

<FIG> is a cross-sectional view of an inflatable cylinder or member <NUM> according to an embodiment. In the illustrated embodiment, the inflatable member <NUM> includes a body member <NUM> and core members <NUM>. The body member <NUM> includes or defines a plurality of cavities <NUM>. The core members <NUM> are disposed in some of the cavities. Some of the cavities are configured to receive the fluid. For example, in some embodiments, in the inflation mode, the pump bulb may be activated or squeezed to transfer the fluid to the cavities of the body member <NUM> to inflate the inflatable member <NUM>.

The core members <NUM> have a softness that is greater than the softness of the body member <NUM>. In other words, the core members <NUM> are softer or more flexible than the body member <NUM>. For example, in some embodiments, the core members <NUM> may be of a durometer that is greater (or softer, or more flexible) than the durometer of the body member <NUM>. In some embodiments, core members <NUM> are formed of a material that is softer than the material that forms the body member <NUM>. In other embodiments, the core members are formed of the same material as the body member. For example, in one embodiment, the body member and the core member are formed of a silicone material.

In the illustrated embodiment, the one of the cavities is disposed along the longitudinal axis LA of the body member <NUM>. The cavity that is disposed along the longitudinal axis LA is one of the cavities that is configured to receive the fluid. The other cavities are disposed around the longitudinal axis LA. In the illustrated embodiment, the central cavity has a circular cross-section and the other cavities have irregular shaped cross-sectional shapes.

<FIG> illustrate an inflatable cylinder or member <NUM> according to an embodiment. <FIG> and <FIG> are cross-sectional views of the inflatable cylinder or member <NUM> according to an embodiment. In the illustrated embodiment, the inflatable member <NUM> includes a body member <NUM> and a core member <NUM>. The body member <NUM> includes or defines a cavity <NUM>. The core member <NUM> is disposed within the cavity <NUM>. In the illustrated embodiment, the core member <NUM> defines a cavity <NUM>. The cavity <NUM> and the cavity <NUM> are configured to receive the fluid. For example, in some embodiments, in the inflation mode, the pump bulb may be activated or squeezed to transfer the fluid to the cavities of the body member <NUM> to inflate the inflatable member <NUM>.

The core member <NUM> has a softness that is greater than the softness of the body member <NUM>. In other words, the core member <NUM> is softer or more flexible than the body member <NUM>. For example, in some embodiments, the core member <NUM> may be of a durometer that is lower (or softer, or more flexible) than the durometer of the body member <NUM>. In some embodiments, core member <NUM> is formed of a material that is softer than the material that forms the body member <NUM>. In other embodiments, the core member is formed of the same material as the body member. In some embodiments, the body member <NUM> is formed of a fabric material.

In the illustrated embodiment, the core member <NUM> is disposed along the longitudinal axis LA of the body member <NUM>. Accordingly, in some embodiments, the cavity <NUM> extends along the longitudinal axis LA. In some embodiments, the core member <NUM> is coupled to the inflatable member (for example, at a first end portion or at a second end portion of the inflatable member). In such embodiments, the core member is configured to remain in its position within the cavity <NUM>.

In the illustrated embodiment, the cavities <NUM> and <NUM> extend coaxially with each other.

As best illustrated in <FIG>, the cavity <NUM> is fluidically coupled to the cavity <NUM>. <FIG> and <FIG> illustrate an end portion of the inflatable member <NUM>. <FIG> is a cross-sectional view of the inflatable member <NUM>.

Claim 1:
An inflatable implant (<NUM>), comprising:
a fluid reservoir (<NUM>) configured to hold fluid;
an inflatable member (<NUM>); and
a pump assembly (<NUM>) configured to transfer fluid from the fluid reservoir (<NUM>) to the inflatable member (<NUM>),
the inflatable member (<NUM>) including a body member (<NUM>), a first core member (<NUM>, <NUM>, <NUM>), and a second core member (<NUM>, <NUM>, <NUM>), the body member (<NUM>) defining a first cavity (<NUM>, <NUM>, <NUM>), a second cavity (<NUM>), and a third cavity (<NUM>, <NUM>, <NUM>), the first core member (<NUM>, <NUM>, <NUM>) being disposed within the first cavity (<NUM>, <NUM>, <NUM>), the second core member (<NUM>, <NUM>, <NUM>) being disposed within the third cavity (<NUM>, <NUM>, <NUM>), the second cavity (<NUM>) being configured to receive the fluid, the first cavity (<NUM>, <NUM>, <NUM>) having an elongated and curved cross-sectional shape, the third cavity (<NUM>, <NUM>, <NUM>) having an elongated and curved cross-sectional shape, the second cavity (<NUM>) having a circular cross-sectional shape.