What is a balloon dilatation catheter?
The biliary stone extraction balloon is an interventional medical device specifically designed for the treatment of biliary stones, and it belongs to a subcategory of the balloon dilatation catheter. Its core function is to form a passage at the site of biliary stricture or stone impaction through the inflation and expansion of the balloon, assisting the stone extraction device to accurately locate and remove the stones. As an important part of medical interventional equipment, this product combines minimally invasive technology with the concept of precision medicine and has become a key tool in modern biliary surgery.
Balloon Dilatation Mechanism
The balloon dilatation catheter is made of medical rubber or high molecular materials such as synthetic polyisoprene. Contrast medium or normal saline is injected into the balloon through the catheter to make it expand to the preset diameter (such as 9mm - 22mm). This process can effectively dilate the stricture segment of the biliary tract, creating an operating space for subsequent stone extraction.
Stone Extraction Coordination Design
Both ends of the balloon are equipped with 304 stainless steel metal marking rings, which enhance the X-ray visualization and ensure accurate positioning during the operation. Some models adopt the three-wing folding technology, and the diameter before expansion can be compressed to φ2.8mm, easily passing through the stricture segment and significantly reducing the surgical risk.
Pre-dilatation of Biliary Stricture
Before the implantation of a biliary stent, the balloon catheter can pre-dilate the stricture site, providing an ideal environment for the release of the stent. For example, in the extended application of PTCA (Percutaneous Transluminal Coronary Angioplasty) technology, its operation logic is highly similar to Percutaneous Transluminal Coronary Angioplasty.
Relief of Stone Impaction
For complex cases such as common bile duct stones, balloon dilatation can temporarily expand the gap between the stone and the biliary wall, and cooperate with a stone extraction basket or laser lithotripsy equipment to complete the stone removal. This process significantly shortens the time of traditional open surgery and reduces the incidence of complications.
Optimization of Post-stent Dilatation
After the stent is implanted, the balloon catheter can perform post-dilatation to ensure that the stent is closely attached to the biliary wall and avoid in-stent restenosis caused by poor apposition.
Innovative Points of Changmei's biliary stone extraction balloon:
✅ Spiral Reinforcement Rib Design: The uniformity of balloon inflation is increased to 93% (only 78% for traditional products).
✅ Conical Tip: The friction force when passing through the sphincter of Oddi is reduced by 65%.
✅ Dual-lumen Integrated Structure: Independent channels for contrast medium injection and balloon control to avoid cross-contamination.
✅ Bile-resistant Corrosion Coating: Maintains stable performance for 500 hours in an environment with a pH of 8.5.
✅ Pressure Sensing Visualization: Displays the internal pressure of the balloon in real time (accuracy ±0.3atm).
Standard Operation Steps:
Insert the guide wire distally to the stone under ERCP.
Advance the biliary stone extraction balloon along the guide wire to the stricture segment.
Inject contrast medium for graded dilation (it is recommended to increase 2atm each time and maintain for 30 seconds).
Withdraw the catheter while maintaining the pressure to complete the stone grasping.
Core Advantages of Changmei Products:
The ultra-thin balloon wall thickness is 0.018mm, and the passability is increased by 32%.
Supports rapid inflation and deflation within 3 seconds (traditional catheters take 8 - 10 seconds).
The unique Anti-Jump technology reduces the out-of-control displacement of stones by 62%.
When purchasing a biliary stone extraction balloon, the following aspects need to be paid attention to:
Pressure Safety: The burst pressure should be > 1.5 times of the RBP (Rated Burst Pressure).
Visualization Precision: The spacing error of the marking band should be < 1mm (Changmei standard: 0.3mm).
Biocompatibility: Passes the cytotoxicity test of ISO 10993-5.
Catheter Pushing Force: ≤2N (Changmei's measured value is 1.4N).
VII. Technical Service Guarantee of Changmei
As a global leader in biliary interventional devices, we provide:
Clinical Training: Free VR simulation operation system (including 5 complex case modules).
Customization Service: Supports the production of special specifications with a balloon diameter of 8 - 40mm.
Warranty Commitment: Full refund or replacement in case of catheter breakage or balloon leakage.
As a core tool for modern biliary stone treatment, the technological innovation of the balloon dilatation catheter directly determines the success rate of the surgery. By deeply integrating materials science with clinical needs, Changmei continuously optimizes the performance of the biliary stone extraction balloon, providing safe and efficient minimally invasive solutions for medical institutions around the world.
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