Abstract in simplified Chinese:本发明系关于一种提供更安全、更有效的纵深式经子宫颈之子宫内人工受孕〔AI〕之方法及设备。这样的一纵深式人工受孕导管系可将不适感及受伤风险减至最小,且不需由技术纯熟的人工受孕专家操作。首先,一导管插入该动物的子宫颈。一薄膜最初位于该导管之一管体内部,但随后可由该管体之一开口伸出,并在受压下进入该子宫颈内。该薄膜不发生摩擦的伸入该子宫颈,因此能减少动物之不适感或受伤风险。当该薄膜完全进入该子宫颈,压力将造成该薄膜的尖端开裂,因而释放人工受孕的液体,以将悬浮于液体中的遗传物质置入该生殖管道中。除了人工受孕及胚胎移植之外,该途径亦可应用于其他治疗、诊断或进程,例如萤光镜照相机、仪器及药物发送。
Abstract:
A biocompatible, biodegradable, bioerodible composite polymer matrix comprising interleukin-2 in an appropriate polymer. The polymer may be a polymer of copolymer of lactic acid, lactide, glycolide, glutamic acid, or it may be collagen or albumin. The material contains from 10² to 10⁸ U IL-2/g of polymer. Also disclosed is a method for making the composite polymer matrix and a method for implanting the material. A soft, malleable controlled-release composite material may be used for intracranial or other implantation and may be shaped or molded to fit the site from which the malignant tissue has been removed, opposing the residual tumor, complementing hemostasis, compatible with anatomical structure, and functioning as an implantable immunotherapeutic adjuvant.
Abstract:
A method and apparatus for safer and more effective deep trans-cervical intra-uterine artificial insemination (AI) is provided. Such a deep AI catheter (300) causes minimal discomfort and risk of trauma, and does not require the services of a highly trained AI professional. First, a catheter (300) is inserted into the cervical tract of the animal. A membrane (410), initially positioned inside a tube section (420) of the catheter (300), is then extended from an opening (440) in the tube (420) and into the tract under pressure. The membrane (410) extends into the tract without friction thereby reducing the discomfort and the risk of trauma or injury to the animal. When the membrane (410) is fully extended into the tract, pressure causes the tip (418) of the membrane (410) to open thereby releasing the AI fluid and depositing the genetic material suspended in the fluid into the reproductive tract. Deployment of the membrane (410) is facilitated by tapering its wall thickness towards its tip (418). In addition to AI and embryo transplant, other applications for the pathway include therapeutic, diagnostic, or other procedures such as introducing fluoroscopic cameras, instruments, and drug delivery.
Abstract:
A bone stabilization system is provided having a plate with a top and bottom surface and a hole therethrough extending along a longitudinal axis. An annular groove in the top surface encircles the axis and defines outer facing sides of a plurality of spring members integral to the plate. A plurality of slots define sides of the spring members the inward facing side of the spring members form the upper portion of the hole, which includes a first spherical portion. A fastener with a spherical portion on the fastener head extends into the hole with the spring members urged apart to allow the head to pass but restraining removal until the resistance provide by the spring members is overcome.
Abstract:
An apparatus for engaging a subterranean borehole includes a bi-center bit having backup cutting elements thereon. The bi-center bit includes a pilot bit section and a reamer bit section adjacent to the pilot bit section. The pilot bit section includes at least one primary cutting element and at least one backup cutting element rotationally trailing and laterally offset from the at least one primary cutting element. Methods of drilling a subterranean borehole include engaging a first portion of a borehole with a reamer bit section of a drill bit and simultaneously engaging a second, opposing portion of the borehole with a pilot bit section adjacent to the reamer bit section.
Abstract:
Earth-boring drill bits include a bit body including a blockage-resistant internal fluid passageway. The blockage-resistant internal fluid passageway includes at least one internal fluid passageway formed in the bit body and a cuttings filtering feature formed in the at least one internal fluid passageway configured to prevent at least some cuttings from flowing through the at least one internal fluid passageway. In one embodiment, the cuttings filtering feature includes at least one lateral member extending transversely across the at least one internal fluid passageway. In another embodiment, the cuttings filtering feature includes forming a central portion of the at least one internal fluid passageway with a width along a lateral axis thereof less than an average width of a fluid path extending through a nozzle disposed at least partially within the at least one internal fluid passageway. Methods of forming the blockage-resistant internal fluid passageway are also disclosed.
Abstract:
Earth-boring drill bits include a bit body including a blockage-resistant internal fluid passageway. The blockage-resistant internal fluid passageway includes at least one internal fluid passageway formed in the bit body and a cuttings filtering feature formed in the at least one internal fluid passageway configured to prevent at least some cuttings from flowing through the at least one internal fluid passageway. In one embodiment, the cuttings filtering feature includes at least one lateral member extending transversely across the at least one internal fluid passageway. In another embodiment, the cuttings filtering feature includes forming a central portion of the at least one internal fluid passageway with a width along a lateral axis thereof less than an average width of a fluid path extending through a nozzle disposed at least partially within the at least one internal fluid passageway. Methods of forming the blockage-resistant internal fluid passageway are also disclosed.
Abstract:
An apparatus for engaging a subterranean borehole includes a bi-center bit having backup cutting elements thereon. The bi-center bit includes a pilot bit section and a reamer bit section adjacent to the pilot bit section. The pilot bit section includes at least one primary cutting element and at least one backup cutting element rotationally trailing and laterally offset from the at least one primary cutting element. Methods of drilling a subterranean borehole include engaging a first portion of a borehole with a reamer bit section of a drill bit and simultaneously engaging a second, opposing portion of the borehole with a pilot bit section adjacent to the reamer bit section.