Patent ID: 8636694
Filing Date: 2014-01-28
Classification: A61M

Abstract:
1. A medical injection system, comprising: an elongate injection apparatus comprising: an elongate shaft including a shaft lumen extending from a proximal end of the shaft to a distal end of the shaft, a proximal portion extending distally from the proximal end, and a distal spiral cut portion extending distally from the proximal portion to the distal end of the shaft, the distal spiral cut portion comprising a first segment extending distally from the proximal portion, a second segment extending distally from the first segment, and a spiral cut extending along the first segment and second segment, the spiral cut having a generally exponentially decreasing pitch along the first segment and a generally linearly decreasing pitch along the second segment; and a needle tip coupled to the shaft and extending distal to the distal end of the shaft, the needle tip including a needle lumen extending therethrough and approximately aligned with the shaft lumen; wherein the shaft lumen and the needle tip lumen provide a passage for injection of therapeutic agents; and an actuator apparatus comprising: