Disclosed is a novel vascular punch employing compressive normal force for tissue separation from a targeted vessel. This invention is particularly designed for making a large round hole without massive bleeding in vascular surgery. A clean, non-frayed hole-making guided by the normal force cutting principle is realized using a side-biting punch mechanism. The side-biting vascular punch comprises a U-shaped razor blade cutter, a backstop for receiving the cutter, and a linkage mechanism for bringing the razor cutter edge onto the backstop surface, forming an aligned line of contact for normal compression force generation and thereby severing tissue out of the targeted vessel. A semi-rigid pad mounted on the backstop may mitigate errors committed in parts manufacturing and assembly, and an adjustable backstop may further improve cutting line formation leading to enhanced cutting effectiveness. Preferred embodiments of side-biting punch include a four-bar linkage mechanism and a single-pivot scissors-like mechanism, provided by a handler, for driving side-biting punch action and for generating cutting force required. The former enables a translational cutting engagement, while the latter an angular cutting engagement, of the razor cutter with the backstop.本發明是一新穎的血管打孔器，其採用了正向壓合的力來分開目標血管的組織。本發明是特別設計來為了在血管手術中打出大型圓洞，而不會造成大量出血。側邊咬斷式打孔（side-biting punch）機構實現了利用正向力切割來達成切口整齊、無磨損的打孔方式。側邊咬斷式血管打孔器包含有U型剃刀刀片、用來止擋刀片的擋板、以及將剃刀刀刃帶到擋板表面的連桿機構，此機構形成了一條可生成正向壓力的對準接觸線，從而切斷目標血管上的組織。安裝在擋板上的半剛性襯墊可以在零件製造和組裝時減少錯誤，而可調整的擋板可以進一步改善切割線的成形，來提高切割效率。側邊咬斷式打孔器的最佳實施例包含四連桿機構及剪刀狀單樞軸機構，由手柄來驅動側邊咬斷式打孔動作及產生所需的切割力。前者實現了平移的咬合切割、後者實現了剃刀刀片和擋板的轉動咬合切割。
