YOUNG, Stephen, Michael, Radley,BADCOTT, Sean, Martin
申请号：
GBGB2019/000141
公开号：
WO2020/065245A1
申请日:
2019.09.25
申请国别(地区):
GB
年份:
2020
代理人:
摘要：
A series of surgical tools (11, 21, 31, 41, 51, 61, 71, 81) have respective operative heads (16, 26, 36, 46, 56, 66, 76, 86 & 96) mounted adjacent a distal end of an elongate waveguide (12, 13, 14). The operative heads (16, 26, 36, 46, 56, 66, 76, 86 & 96) are used to remove PMMA bone cement (2, 5) from within a hollow bone (1), such as a femur (1), as part of a prosthesis revision operation, such as replacement of an artificial hip joint. Torsional-mode ultrasonic vibrations are transmitted along the waveguide (12, 13, 14) to the respective operative heads (16, 26, 36, 46, 56, 66, 76, 86 & 96), which are applied to the bone cement (2, 5), softening it and facilitating its removal. Elongate radial channels (18, 23, 28, 38) extend across cement- contacting faces of several of the surgical tools (11, 21, 31, 41, 71, 81), acting to focus and transmit the torsional-mode ultrasonic vibrations into adjacent cement (2, 5). In another tool (51), scalloped recesses (58, 59) in its cement-contact face have substantially the same effect, while in a further tool (61), a series of notches (65) along a distal edge (69) of the tool (61) have an analogous function. The operative heads (76, 86, 96) of certain tools (71, 81) can be embedded into a cement plug (5) then used to pull the plug (5) as a unit out of the bone (1).L'invention porte sur une série d'outils chirurgicaux (11, 21, 31, 41, 51, 61,71, 81) qui ont des têtes fonctionnelles respectives (16, 26, 36, 46, 56, 66, 76, 86 et 96), montées adjacentes à une extrémité distale d'un guide d'ondes allongé (12, 13, 14). Les têtes fonctionnelles (16, 26, 36, 46, 56, 66, 76, 86 et 96) sont utilisées pour enlever le ciment osseux en PMMA (2, 5) de l'intérieur d'un os creux (1), tel qu'un fémur (1), dans le cadre d'une opération de révision de prothèse, telle que le remplacement d'une articulation de la hanche artificielle. Des vibrations ultrasonores en mode torsion sont transmises le long du guide d'ondes (12, 13, 14) aux têtes fonc
