An implanting structure and method according to which there is introduced into a body cavity different from the final location of the implant a structure having a general outline of the implant and on which the body tissue will grow. This structure is mounted in the latter body cavity in such a way that the tissue grows on the structure only from a predetermined feeding part of the structure with the remainder of the structure being maintained out of engagement with the body tissue. After this structure is separated from the tissue at the feeding part, with the structure covered with body tissue which has grown thereon, the structure with the body tissue thereon is situated at the desired location with a connection being provided at the feeding part so that the tissue which has grown will continue to be fed at the final location of the implant.
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of copending application Ser. No. 425,805, filed Dec. 18, 1973, and entitled Method and Material for Promoting the Growth of Animal Tissue, now abandoned, and a continuation-in-part of application Ser. No. 298,024, filed Oct. 16, 1972, and entitled Implanting Method, now Pat. No. 3,826,241.
A percutaneous access device (PAD) is provided with a sleeve or separable member which may be detached from the device to enable the culturing of a multilayer fibroblast coating on the member in a stable and undisturbed environment. The member is constructed so that when it is assembled into the device and the device is implanted in a patient, the cultured coating of the member is exposed to the patient's dermis whose fibroblasts will, after a relatively short healing period, merge with the fibroblasts of the coating to form a barrier layer interlocked with the member to prevent epidermal ingrowth or marsupialization of the implanted device. Implantation techniques for further facilitating the formation of the dermal barrier are also disclosed.
A percutaneous access device includes a body having a horizontal disc-like base flange and a frusto conical projection extending centrally upwardly from one side of the base flange. An elongate flexible tube extends loosely through a bore through the projection and base flange and is sealingly bonded to the body adjacent the bottom of the bore. A coating of a silicone-polycarbonate is applied to the outer surface of the projection and is formed with a multiplicity of microscopic pores to facilitate the bonding of dermal cells to the device upon implantation. The body is of a relatively soft, flexible, biocompatible material so that the device absorbs forces tending to displace the implanted device.
A long term intra-aortic balloon pump (LTIABP) includes an enlarged pumping chamber on the order of 50 cc to 65 cc, inclusive. The pumping chamber is an intra luminal, large volume, long term balloon pump. The balloon pump can include tapered longitudinal ends and/or be segmented into a plurality of pumping chamber segments, each pumping chamber subsegment separated by a flexible power conduit link, where the diameter of the pumping chamber subsegments are independent of one another such as decreasing in size as the subsegments are further from the heart to accommodate the decreasing diameter of the aorta. The LTIABP can be used with any skin connector, or can be used with a percutaneous access device (PAD). The PAD can be sized and shaped to be surgically implanted in any desired location of the patient corresponding to the particular entry selected for implantation of a temporary IABP or LTIABP.
