Connectors and Cables for Use With Ventricle Assist Systems

Abstract

Systems, assemblies, modules, and methods for connecting components of medical devices employ connector cables with electrical conductors. A method of supplying electrical power to a medical device includes transmitting electrical power from a battery module to a base module through a connector cable. The connector cable includes a connector cable output connector removably coupled with an input connector of the base module. The connector cable output connector includes at least four connectors configured for transferring electrical power. Data is transmitted between the battery module and the base module through the connector cable. Electrical power is transmitted from the base module to the medical device.

Claims

1. A method of supplying electrical power to a medical device worn by a user or implanted in the user, the method comprising: transmitting electrical power from a battery module to a base module through a connector cable comprising a connector cable output connector removably coupled with an input connector of the base module, wherein the connector cable output connector comprises at least four connectors configured for transferring electrical power; transmitting data between the battery module and the base module through the connector cable; and transmitting electrical power from the base module to the medical device.

2. The method of claim 1, the transmitting data between the battery module and the base module through the connector cable comprises transmitting a connection signal indicative of connection of the battery module with the input connector of the base module via the connector cable.

3. The method of claim 1, further comprising controlling, by the base module, operation of the medical device.

4. The method of claim 1, wherein the at least four connectors comprises two power connectors and two ground connectors.

5. The method of claim 4, wherein the at least four connectors are arranged in a linear array within the connector cable so that the connector cable has an elongated cross section.

6. The method of claim 5, wherein: the connector cable comprises a data connector; and the two power connectors and the two ground connectors are arranged symmetrically on opposite sides of the data connector to enable coupling of the connector cable output connector to the input connector of the base module in each of two opposite orientations.

7. The method of claim 6, wherein the connector cable comprises an optical fiber connected to the data connector.

8. The method of claim 1, wherein: the at least four connectors of the connector cable output connector comprise spring-loaded metal pins; the input connector of the base module comprises metal plates; and each of the metal plates is engaged by a respective one of the spring-loaded metal pins.

9. The method of claim 1, wherein the connector cable output connector comprises a latching mechanism configured to physically attach the connector cable output connector to the base module.

10. The method of claim 9, wherein: the latching mechanism comprises two latching arms; and each of the latching arms comprises a dimple of a complementary shape and size to a respective recess on a surface of the base module.

11. The method of claim 9, wherein the latching mechanism comprises a first magnetic element configured to latch to a second magnetic element mounted to the base module.

12. The method of claim 11, wherein the first magnetic element is configured to unlatch from the second magnetic element upon application of a particular breakaway force.

13. The method of claim 1, wherein the battery module comprises a battery module input connector configured to receive electrical power from a second battery module and/or a charging unit.

14. The method of claim 13, further comprising implementing a charging sequence in which the base module is charged first via electrical power received by the battery module and the battery module is charged via the electrical power received by the battery module after the base module is charged.

15. The method of claim 1, wherein the connector cable is fixedly connected with the battery module.

16. The method of claim 1, wherein: the battery module comprises a battery module output connector; and the connector cable comprises a connector cable input connector that is couplable with the battery module output connector and decouplable from the battery module output connector.

17. The method of claim 1, wherein the battery module comprises a spooling assembly on which the connector cable can be spooled and from which the connector cable can be unspooled to vary a length by which the connector cable extends from the battery module.

18. The method of claim 1, wherein the base module comprises one or more base module battery cells and further comprising controlling, via the base module, distribution of electrical power received by the base module to simultaneously charge the one or more base module battery cells and output electrical power to the medical device.

19. The method of claim 1, wherein the medical device comprises an implanted blood pump assembly.

20. The method of claim 19, wherein the base module is configured to monitor operation of the implanted blood pump assembly.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0042] FIG. 1 is a simplified schematic diagram illustrating a system for supplying power to a medical device worn by a user or implanted in the user, in accordance with many embodiments.

[0043] FIG. 2 illustrates a cross-section of a connector, in accordance with many embodiments.

[0044] FIG. 3 illustrates an example medical device system that employs the system of FIG. 1.

[0045] FIG. 4 illustrates a battery module that includes a connector assembly having a mechanical latching mechanism, in accordance with many embodiments.

[0046] FIG. 5 illustrates a connector assembly that includes mechanical latching mechanisms, in accordance with many embodiments.

[0047] FIG. 6 illustrates a connector assembly that includes a magnetic latching mechanism, in accordance with many embodiments.

DETAILED DESCRIPTION

[0048] In the following description, various embodiments of the present invention will be described. For purposes of explanation, specific configurations and details are set forth in order to provide a thorough understanding of the embodiments. However, it will also be apparent to one skilled in the art that the present invention may be practiced without the specific details. Furthermore, well-known features may be omitted or simplified in order not to obscure the embodiment being described.

[0049] Referring now to the drawings, in which like reference numerals represent like parts throughout the several views, FIG. 1 shows a system 10, in accordance with many embodiments, for supplying power to a medical device worn by a user or implanted in the user. The system 10 includes a wearable or implantable medical device 12, a base module 14, a plurality of external battery modules 16, and a non-worn energy source 18. The external battery modules 16 are configured for selective serial connection to enable the connection of any suitable number of the external battery modules 16 to the base module 14 to vary the total battery capacity worn by the user. The non-worn energy source 18 can be any suitable energy source, for example, a wall power unit configured to convert utility power (e.g., 110 volt AC power) to direct current having a voltage level compatible with the external battery modules 16 and the base module 14. The non-worn energy source 18 can be selectively and intermittently connected to the most distal external battery module 16 to supply electrical power used to recharge the external battery modules 16, recharge the base module 14, and/or be output to the medical device 12 via a connection line 20.

[0050] The base module 14 is configured to supply operating electrical power to the medical device 12 via the connection line 20. The base module 14 includes one or more base module battery cells 22, a base module controller 24, and a base module input connector 26. The base module controller 24 is configured to supply power to the medical device 12 output by the one or more base module battery cells 22 and/or received via the base module input connector 26. In many embodiments, the base module controller 24 includes an integrated charger for recharging the one or more base module battery cells 22 via electrical power received via the base module input connector 26. In many embodiments, the base module controller 24 is configured to detect when at least one external battery module 16 or the non-worn energy source 18 is connected to the base module input connector 26. For example, the base module input connector 26 can include a data connection to receive a signal when at least one external battery module 16 or the non-worn energy source 18 is connected to the base module input connector 26. Alternatively, the base module controller 24 can be configured to detect when a suitable voltage potential is applied to the base module input connector 26 indicative of at least one external battery module 16 or the non-worn energy source 18 being connected to the base module input connector 26. When the connection of at least one of the external battery modules 16 or the non-worn energy source 18 to the base module input connector 26 is detected, the base module controller 24 can supply electrical power to the medical device solely via electrical power received via the base module input connector 26 and can simultaneously recharge the one or more base module battery cells 22 via electrical power received via the base module input connector 26 if the one or more base module battery cells 22 are not already fully charged. When the base module controller 24 does not detect the connection of any power source to the base module input connector 24, the base module controller 24 is configured to supply electrical power to the medical device 12 via electrical power from the one or more base module battery cells 22.

[0051] In the illustrated embodiment, each of the external battery modules 16 includes an output cable 28, an output connector 30, one or more external battery cells 32, an external battery controller 34, and an input connector 36. The external battery controller 34 is configured to supply power via the output connector 30 output by the one or more external battery cells 32 and/or received via the input connector 36. In many embodiments, the external battery controller 34 includes an integrated charger for recharging the one or more external battery cells 32 via electrical power received via the input connector 36. In many embodiments, the external battery controller 34 is configured to detect when at least one external battery module 16 or the non-worn energy source 18 is connected to the input connector 36. For example, the input connector 36 can include a data connection to receive a signal when at least one external battery module 16 or the non-worn energy source 18 is connected to the input connector 26. Alternatively, the external battery controller 34 can be configured to detect when a suitable voltage potential is applied to the input connector 36 indicative of at least one external battery module 16 or the non-worn energy source 18 being connected to the input connector 36. When the connection of at least one of the external battery modules 16 or the non-worn energy source 18 to the input connector 36 is detected, the external battery controller 34 can supply electrical power via the output connector 30 via electrical power received via the input connector 36 and can simultaneously recharge the one or more external battery cells 32 via electrical power received via the input connector 36 if the one or more external battery cells 32 are not already fully charged. When the external battery controller 34 does not detect the connection of any power source to the input connector 34, the external battery controller 34 is configured to output electrical power via the output connector 30 via electrical power from the one or more external battery cells 32.

[0052] Any suitable serial combination of the external battery modules 16 can be used. For example, zero, one, two, three, four, or greater of the external battery modules 16 can be serially connected to the base module 14 to supply power to the base module 14 for supply to the medical device 12. Additionally, in many embodiments, the non-worn power source 18 can be connected directly to the base module 14 to supply electrical power that can be used by the base module 14 to supply electrical power to the medical device 12 and to recharge the one or more base module battery cells 22 if the one or more base module battery cells 22 are not already fully charged. While the external battery modules 16 are configured to be serially connected physically, the external battery modules 16 are configured so as to be connected in parallel electrically so as to not vary the voltage supplied to the base module 14.

[0053] FIG. 2 shows a connector arrangement 38 that can be used in the base module input connector 26, the output connector 30, and the input connector 36. The connector arrangement 38 includes two first power connectors 40, two second power connectors 42, and a data connector 44. The first and the second connectors 40, 42 are used to transfer power. For example, each of the first connectors 40 can be electrically connected to a power lead and each of the second connectors 42 can be electrically connected to a ground lead, and vice-versa. The data connector 44 is used to connect data lines to transmit data between the base module controller 24 and the one or more external battery controllers 34 and/or between any of the one or more external battery controllers 34. The symmetrical arrangement of the connectors 40, 42, 44 accommodates connection of the connector arrangement 38 in opposite orientations, thereby accommodating proper connection in either of the two possible orientations between connectors.

[0054] The system 10 can be employed in any suitable medical system (e.g., a worn or at least partially implanted medical system). For example, FIG. 3 illustrates a mechanical circulatory support system 100 that employs the system 10. The mechanical circulatory support system 100 includes an implantable blood pump assembly (i.e., medical device 12) implanted in a patient 102, a ventricular cuff 104, an outflow cannula 106, and an external system controller (base module 14). In the illustrated configuration, two of the external battery modules 16 are shown serially connected to the external system controller 14. As described herein, however, any suitable number of the external battery modules 16 and/or the non-worn energy source 18 (e.g., that can be powered via being plugged into an outlet 107) can be coupled with the external system controller 14 to supply power to the external system controller 14 for supply to the blood pump assembly 12. The blood pump assembly 12 can include a VAD that is attached to an apex of the left ventricle, as illustrated, or the right ventricle, or both ventricles of the patient's heart 108. The VAD can include a centrifugal pump (as shown) that is capable of pumping the entire output delivered to the left ventricle from the pulmonary circulation (i.e., up to 10 liters per minute). Related blood pumps applicable to the present invention are described in greater detail below and in U.S. Pat. Nos. 5,695,471, 6,071,093, 6,116,862, 6,186,665, 6,234,772, 6,264,635, 6,688,861, 7,699,586, 7,976,271, 7,997,854, 8,007,254, 8,152,493, 8,652,024, and 8,668,473 and U.S. Patent Publication Nos. 2007/0078293, 2008/0021394, 2009/0203957, 2012/0046514, 2012/0095281, 2013/0096364, 2013/0170970, 2013/0121821, and 2013/0225909, all of which are incorporated herein by reference for all purposes in their entirety. The blood pump assembly 12 can be attached to the heart 108 via the ventricular cuff 104, which can be sewn to the heart 108 and coupled to the blood pump 12. The other end of the blood pump 12 connects to the ascending aorta via the outflow cannula 106 so that the VAD effectively diverts blood from the weakened ventricle and propels it to the aorta for circulation through the rest of the patient's vascular system.

[0055] FIG. 3 illustrates the mechanical circulatory support system 100 during battery powered operation by the system 10 via the two connected external battery modules 16. A driveline (connection line 20) that exits through the patient's abdomen 110 connects the implanted blood pump assembly 12 to the external system controller 14, which monitors system 100 operation. Related controller systems applicable to the present invention are described in greater detail below and in U.S. Pat. Nos. 5,888,242, 6,991,595, 8,323,174, 8,449,444, 8,506,471, 8,597,350, and 8,657,733, EP 1812094, and U.S. Patent Publication Nos. 2005/0071001 and 2013/0314047, all of which are incorporated herein by reference for all purposes in their entirety. As described herein the power system 10 used to power the system 100 can include any suitable combination (zero, one, two, three, four, or more) of the external battery modules 16 and/or the non-worn power source 18.

[0056] FIG. 4 illustrates a battery module with a connector assembly, in accordance with many embodiments. Although not shown in FIG. 4, as described above with respect to FIG. 1, the battery module 16 can include one or more battery cells disposed within its housing that may provide electrical power to a medical system including an implanted or worn medical device. For example, the battery cells of the battery module 16 can provide electrical power to an external controller 14, which is configured to supply power to a medical device such as an implantable blood pump.

[0057] As shown in FIG. 4, the battery module 16 includes a connector cable 28 fixedly connected with the housing and extending from the housing to a distal end of connector cable 28. The connector cable 28 includes electrical conductors 40 and 42 configured to transfer power from the one or more battery cells and an optical fiber 44 to transfer data. The battery module 16 further includes a battery module output connector 30 connected to the distal end of the connector cable and configured to be removably coupled with an input connector 26 mounted on the external controller 14. The input connector 26 includes metal contact plates 48 that couple with exposed ends of the electrical conductors 40 and 42 and an optical connector 50 that couples with the optical fiber 44. In many presently preferred embodiments, the input connector 26 does not include any moving parts, and can be sealed to prevent water or dust ingression into the housing of the external controller 14.

[0058] The exposed ends of the electrical conductors 40 and 42 can include spring-loaded metal pins coupled to the electrical conductors. In some embodiments, the spring-loaded metal pins are of complementary shapes and sizes to the respective metal contact plates 48 of the medical device input connector 26 so as to allow electrical connection between the battery module 16 and the external controller 14. The use of spring-loaded metal pins to couple with the metal contact plates 48 may avoid damaging the pins during mating of connector cable 28 with input connector 26.

[0059] While the above-mentioned features of battery module output connector 30 and input connector 26 allow for electrical and optical coupling of electrical conductors 40, 42 and optical fiber 44 with the external controller 14 in order to transmit electrical power and data, in many embodiments the battery module 16 is physically coupled to external controller 14 so that the electrical and optical connections remain securely coupled. Accordingly, in many embodiments, the battery module output connector 30 also includes a latching mechanism 31. In some embodiments, the latching mechanism 31 includes two latching arms 31. Each of the latching arm 31 can include a dimple 46 on the outer surface of the latching arm and a corresponding protrusion on the inner surface of the latching arm. The protruding portion of each dimple 46 can have a complementary shape and size to a respective recesses 52 on the housing of external controller 14, so that latching arm 31 is configured to mate with the recess 52. In some embodiments, the recesses 52 may be sized to allow a snap fit connection with the dimples 46 of latching arms 31. Although only shown on the top surface of the housing of external controller 14, an additional recess 52 can be disposed on the bottom surface of the housing of the external controller 14 so as to mate with the bottom latching arm 31.

[0060] As described above with respect to FIG. 2, the electrical conductors 40, 42 and the optical fiber 44 can be arranged in a linear array within the connector cable 28 so that the connector cable 28 has an elongated rectangular cross section. The elongated rectangular or flat nature of the cross section may allow connector cable 28 to easily conform to a patient's body without excessive twisting and/or tangling of the cable. As also described above with respect to FIG. 2, the two pairs of electrical conductors 40, 42 can be arranged symmetrically on opposite sides of optical fiber 44 to enable coupling of the battery module output connector 30 to the input connector 26 in each of two opposite orientations.

[0061] The battery module 16 can include a spooling assembly 54 disposed within its housing, on which the connector cable can be spooled and unspooled. The spooling assembly 54 may allow a patient or other user to vary the length by which the connector cable 28 extends from the housing. In some embodiments, the spooling assembly 54 is spring loaded and configured to allow for locking of the connector cable at a desired length and to allow for selective retraction of the connector cable.

[0062] FIG. 5 illustrates a connector assembly, in accordance with many embodiments. The connector assembly includes a connector 54 that operates similarly to connector cable 28 and battery module output connector 30, except that connector 54 is decoupleable from the battery module 16. The connector 54 is a separate component that is configured to removably couple to either or both of the external controller 14 and/or the battery module 16. The connector 54 includes a first connecting end 30 similar to battery module output connector 30 described above with respect to FIG. 4. The connector 54 includes the electrical conductors 40, 42 and an optical fiber 44. The output connector 30 is configured to couple to the metal contacts 48 and optical connector 50 of input connector 26 mounted to external controller 14. As described above, the electrical conductors 40, 42 can be coupled with spring-loaded pins configured to electrically couple with the metal contacts 48. The connector 54 includes a first set of latching arms 31 with dimples 46, similar to latching arms 31 described in FIG. 4, which mechanically latch the connector 54 to the recesses 52 on the external controller 14.

[0063] At the opposite end of the first connecting end 30, the connector 54 include a second connecting end 55 for coupling with an output connector 56 of the battery module 16. Although not shown in FIG. 5, the connecting end 55 may also be used to couple the connector 54 to the external controller 14 or another external controller configured similar thereto. The output connector 56 can include metal contacts 48 and an optical connector 50 similar to the input connector 26 of the external controller 14. The second connecting end 55 can include additional spring-loaded contacts connected to the electrical conductors 40, 42 and an optical connector coupled to the optical fiber 44. As described above, the electrical conductors 40 and 42 can be connected to spring-loaded pins that allow for electrical connection between the connector 54 and the output connector 56 of the battery module 16. The second connecting end 55 can include a second pair of latching arms 31 with dimples 46 (not shown). The dimples 46 on the latching arms 31 at second connecting end 55 can be configured to latch to the recesses 52 on surfaces of the battery module 16 as described above. The recesses 52 on the battery module 16 can be the same size and shape as the recesses 52 on the external controller 14, to allow a snap fit connection with the dimples 46 of the latching arms 31.

[0064] As shown in FIG. 5, the battery module 16 can optionally include an input connector 58 for receiving electrical power from another battery module 16, a non-wearable power source 18, or any other suitable power source. As can be seen in FIG. 5, the input connector 58 can include metal contacts 48 and optical connector 50 similar to that of the output connector 56 and the input connector 26. The housing of battery module 16 can also include another pair of recesses 52 similar to previously described recesses 52. In this way, each of the input connector 58, the output connector 56, and the input connector 26 can be connected with any given connecting end of the connector 54.

[0065] As described above with respect to the connector cable 28 of FIG. 4, the body of the connector 54 can have an elongated rectangular or flat cross section that may allow connector 54 to conform with a patient's body without excessive twisting and/or tangling of the cable. As also described above with respect to FIG. 2, the two pairs of electrical conductors 40, 42 can be arranged symmetrically on opposite sides of the optical fiber 44 to enable coupling of the battery module output connector 30 to the input connector 26 in each of two opposite orientations, allowing for flexibility and ease of use in connecting and disconnecting battery modules and/or external controllers.

[0066] FIG. 6 illustrates a connector assembly with a magnetic latching mechanism, in accordance with many embodiments. Although not shown in detail, a connector 60 can include the components and arrangement of the connector cable 28, the output connector 30, and/or the connector 54 described above, except rather than latching arms 31, the connector 60 includes a magnetic latching mechanism. Specifically, at one or both ends of the connector 60, a first magnetic element 62 can be provided. In some embodiments, the magnet element 62 includes recesses in order to expose electrical conductors and/or optical fibers of the connector 60. In order to latch the connector 60 to the component 64 (which may be a battery, an external controller, or any other worn component in a medical device as described above), the input connector 66 can include a second magnetic element 68 that magnetically attracts the first magnetic element 62.

[0067] The first magnetic element 62 and the second magnetic element 66 can be designed to unlatch upon application of a particular breakaway force in some embodiments. In some embodiments, the particular breakaway force corresponds to a moderate pulling by the patient on the connector 60. In some presently preferred embodiments, the first magnetic element 62 and second magnetic element 66 can unlatch in response to a force resulting from a component coupled to the opposite side of the connector 60 being released from a supporting holster on the patient's body so as to avoid damage to the component 64.

[0068] Other variations are within the spirit of the present invention. Thus, while the invention is susceptible to various modifications and alternative constructions, certain illustrated embodiments thereof are shown in the drawings and have been described above in detail. It should be understood, however, that there is no intention to limit the invention to the specific form or forms disclosed, but on the contrary, the intention is to cover all modifications, alternative constructions, and equivalents falling within the spirit and scope of the invention, as defined in the appended claims.

[0069] The use of the terms a and an and the and similar referents in the context of describing the invention (especially in the context of the following claims) are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by context. The terms comprising, having, including, and containing are to be construed as open-ended terms (i.e., meaning including, but not limited to,) unless otherwise noted. The term connected is to be construed as partly or wholly contained within, attached to, or joined together, even if there is something intervening. Recitation of ranges of values herein are merely intended to serve as a shorthand method of referring individually to each separate value falling within the range, unless otherwise indicated herein, and each separate value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., such as) provided herein, is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.

[0070] Preferred embodiments of this invention are described herein, including the best mode known to the inventors for carrying out the invention. Variations of those preferred embodiments may become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the invention unless otherwise indicated herein or otherwise clearly contradicted by context.

[0071] All references, including publications, patent applications, and patents, cited herein are hereby incorporated by reference to the same extent as if each reference were individually and specifically indicated to be incorporated by reference and were set forth in its entirety herein.