A kind of multifunctional balloon catheter and system

Abstract

The invention relates to a multifunctional balloon catheter and system integrated with a puncture needle. The uniquely designed balloon catheter and system can be used for benign and malignant bile duct strictures, esophageal cancer, colorectal cancer, bronchial lung cancer, gastric antrum cancer, primary For different types of tumors such as portal vein and vena cava tumor thrombus of chronic liver cancer, the eccentric balloon and the distal part of the puncture needle are precisely placed into the luminal tumor site, and the inflated balloon pushes the distal end of the puncture needle close to the tumor and rotates The proximal end of the system manipulates the nut of the system, pushes the puncture needle out of the catheter, and the distal end of the puncture needle with shape memory bends and penetrates into the tumor. The puncture needle can be used for intratumoral injection of tumor therapeutic drugs to treat tumors, or aspirate tissue biopsy, Or it can be used as a radiofrequency ablation electrode for radiofrequency ablation / heating to treat tumors; based on this system, with different designs, it can also be used for the injection of therapeutic drugs into atherosclerotic plaques and the treatment of aortic dissection aneurysms.

Description

technical field [0001] The invention belongs to the field of medical devices, and relates to a multifunctional balloon catheter and a system, which can be used for tissue biopsy of luminal lesions, injection of therapeutic drugs into luminal lesions, and radiofrequency heating / ablation to treat tumors. Background technique [0002] 1. Primary malignant tumors of inoperable hollow organs or primary liver cancer Portal vein and inferior vena cava cancer are the difficulties in the field of tumor treatment and research today. Systemic chemotherapy, radiotherapy and other palliative treatments for complications cannot Surgical resection of luminal tumors is the main treatment modality, but the therapeutic effect is extremely limited. [0003] 1. Overview of the current status of the treatment of luminal organ malignancies [0004] Esophageal cancer: Esophageal cancer is one of the leading causes of cancer deaths and the eighth most common malignancy worldwide. Statistics in 20...

AI Technical Summary

Problems solved by technology

This radiofrequency ablation catheter has some disadvantages: it cannot monitor the treatment temperature in real time; two ring electrodes must be in contact with the tumor tissue to achieve the effect of thermal ablation, and the contact between the ring electrode and normal bile duct tissue can lead to non-targeted thermal ablation of bile duct tissue damage

[0020] Radiofrequency hyperthermia and ablation therapy for luminal tumors mainly have the following problems: (1) Tumors in the luminal cavity grow unevenly in the tube wall, some grow eccentrically, or only part of the tube wall is involved, which requires ablation therapy. (2) Chinese scholars have used Emcision’s Habib Endo HPB bipolar radiofrequency catheter to treat liver cancer portal vein tumor thrombi, but it is difficult for radiofrequency ablation electrodes to stick to the tumor, and normal tissue The treatment effect is not satisfactory for the injury of the portal vein wall, so it is necessary to design a unique radiofrequency ablation catheter system, which can accurately place the radiofrequency ablation needle inside the tumor focus, and maintain the patency of the portal vein or inferior vena cava to avoid damage to the tumor. Already damaged liver brings secondary damage

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