Full-longitudinal ultrasonic surgical system

Abstract

The invention discloses a full-longitudinal ultrasonic surgical system, which comprises an ultrasonic generator and an ultrasonic surgical tool. The ultrasonic surgical tool works by using a front end face of a working head, and the cutting direction of the ultrasonic surgical tool is consistent with the axial amplitude direction of the front end face. The full-longitudinal ultrasonic surgical system also comprises a restraint device for tissues to be cut. The restraint device defines the tissues to be cut in front of the cutting direction of the working head of the ultrasonic surgical tool. The foremost end face of a surgical instrument executing end is used for cutting / coagulating the tissues, and the stable quality for cutting and coagulating can be guaranteed by using the stable amplitude at the front end of the working head. The cutting direction during working is consistent with the transmission direction of the ultrasonic energy, and the cutting direction is positioned just on a direct path of the ultrasonic spreading direction, so that the cutting efficiency is improved. The working length of the surgical instrument is unlimited; and the working head is positioned in an external sleeve before cutting, so the clamp and dissociation under the non-cutting condition can be realized by using two clamp arms without any other instrument, and the surgical efficiency is obviously improved.

Description

technical field [0001] The invention belongs to the field of medical instruments and relates to ultrasonic surgical instruments. Background technique [0002] The ultrasonic surgical system consists of an ultrasonic generator and an ultrasonic surgical tool. The ultrasonic generator outputs excitation electric power from its internal circuit part, and then is converted into ultrasonic vibration by its ultrasonic transducer, which can be transmitted to the ultrasonic surgical tool. Thereby completing various operation functions. Available Ultrasonic Surgical Knives, see figure 1 , which is to use the clamping action between the working head 15 in the outer sleeve 11 of the instrument and the clamp 13 that opens and closes (through the hinge 12) toward the working head 15 to clamp the tissue to be cut 14, and then use the working head 15 Longitudinal vibration (as indicated by the arrow) completes the cutting and hemostasis of the tissue 14 to be cut. At this time, the tiss...

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Problems solved by technology

[0003] In addition, the amplitudes corresponding to the points in the longitudinal direction of the contact between the working head 15 and the clamp 13 are inconsistent, and they conform to the law of cosine distribution, such as figure 2 , image 3 As shown: the amplitude Am of the head of the working head 15 is the largest, and the direction toward the outer sleeve 11 gradually decreases according to the cosine law, which leads to inconsistent effects on tissue cutting and hemostasis in the longitudinal direction; at the same time, because of the cosine distribution of their amplitudes. The available working length of ultrasonic surgical instruments is limited, and the cutting speed is also limited by the minimum amplitude position; for example, the effective working length of an ultrasonic surgical tool made of titanium alloy is about 10 mm at an ultrasonic frequency of 55.5 kHz

The clinical problem that this brings is: when cutting, the tissue is cut quickly near the position with large amplitude, while the tissue at the other end may still be in a state of adhesion. Ultrasonic surgical instruments cannot be used to close large blood vessels, and when sealing blood vessels, one end is prone to over-coagulation and the other end is under-coagulation. Even the closure quality of closed blood vessels is lower than expected (such as 300mmHg pressure test for 5 minutes after closure is prone to rupture), And its short effective working length further reduces the operation efficiency

In addition, in the existing ultrasonic surgical tools, the tissue can only be clamped between the clamp arm and the working head during work, and the working head must have a smooth surface to prevent cracks from causing failure during ultrasonic work, so it cannot be applied Effective clamping force and friction force to the tissue, so tissue freeing and clamping must be realized by other instruments during surgery, which further reduces the operation efficiency and operation time

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