Adjustable pressure type balloon spreader in knee joints

Abstract

The invention discloses an adjustable pressure type balloon spreader in knee joints. The spreader includes a minimally invasive puncture balloon unit and an adjustable pressure type syringe unit connected to the minimally invasive puncture balloon unit and injecting fluid into the minimally invasive puncture balloon unit; the adjustable pressure type syringe unit is connected to the minimally invasive puncture balloon unit through an extension tube; the minimally invasive puncture balloon unit includes a puncture spindle tube which can be punctured into a knee joint; the sidewall on the tail end of the puncture spindle tube is provided with through holes; and the peripheries of the through holes are coated with a soft balloon that can be expanded to open the compartment of the knee joint under the action of the injected fluid. The provided spreader is simple in operation and convenient in using, and can conveniently open the compartment of the knee joint through a minimally invasive incision; the spreader can accurately control supporting force, and the stress of supporting parts are dispersed; the spreader can be operated in the safe ranges of articular cartilage, meniscus and ligament; and therefore, the difficulty of knee joint operations can be reduced, operation efficiency can be enhanced, and postoperative recovery can be accelerated.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a pressure-adjustable balloon expander in a knee joint. Background technique [0002] Knee arthroscopy is a rod-shaped optical instrument with a diameter of about 5mm that uses endoscopic camera system, light source system, irrigation system and other supporting devices to observe the internal structure of the joint, and can inspect and treat intra-articular diseases. Knee arthroscopy is a minimally invasive surgery. [0003] In the arthroscopic repair of the posterior horn of the meniscus, an incision about 0.5-1 cm long should be made at the "soft spot" on the inside and outside of the knee joint. position, press the knee joint and apply varus and external force to open the lateral compartment; when exploring the medial compartment of the knee joint, it is necessary to place the knee joint in a flexed position of 10-30° and apply valgus external force while maintaini...

AI Technical Summary

Problems solved by technology

However, more patients with posterior horn injury of the meniscus also have joint contracture, and it is difficult to expose the posterior horn of the meniscus, especially the injury of the posteromedial horn of the medial meniscus, because it is close to the joint midline, the anatomical position is very special, and the medial space is relatively small. Narrow, the joint space needs to be exposed through a large valgus stress of the knee joint. Even if the patient has no joint contracture, the posteromedial angle cannot be well exposed due to anatomical restrictions. Excessive valgus may cause damage to the medial collateral ligament. Further increasing the instability of the joint will lead to an increase in the difficulty of the operation, making it impossible for the operator to effectively use conventional methods for meniscus repair and suture and other treatments, and even form "technical neglect of treatment".

In the treatment of lateral meniscus injury, the use of the "4" font position to expose the joint space cannot accurately control the varus stress, and the damage to the lateral collateral ligament caused by the body position cannot be well controlled.

[0004] In order to solve the above problems, people have made various technical improvements, using various supports to open the knee joint, but there is stress concentration at the support part, and the support force cannot be accurately controlled, which increases the damage of articular cartilage, meniscus and ligaments , and the design of the support is large, inconvenient to operate, forming a large surgical incision, and occupying a large space in the joint, which is easy to block the surgical operation space, and cannot increase the exposure range of the meniscus well, which is not conducive to minimally invasive surgery

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