Coaxial expansion type intubation guiding device free of displacement

Abstract

The invention relates to a non-displacing coaxial expansion type intubation guiding device, which belongs to medical instruments and is used for implementing visceral organ intubation operation by clinicians. A screwing extrusion fixing structure of the guide tube and the fixing tube is invented, so that the guide tube and the superhard guide wire are firmly fixed together, displacement of the guide tube is avoided, a tube cavity of the guide tube can be in close contact with the guide wire, the guide wire can pass through the guide tube, the tip of the front end of the guide tube is formed, the guide tube can be conveniently placed into an internal organ, the front end of the expansion tube can be in close contact with the guide tube, and the expansion tube can pass through the expansion tube. After the rear end of the expansion tube is necked inwards, the expansion tube cannot pass through the step after reducing and is clamped at the step level, the expansion tube can be coaxially overlapped and clamped at the step level after being overlapped, and the intubation guide sheath tube is in close contact with the expansion tube and can enter an internal organ to realize intubation or other instruments after passing through the expansion tube.

Description

Technical Field

[0001] The invention discloses a coaxial expansion type cannula guide which will not shift, belongs to a medical device and is used by clinical physicians to perform organ cannulation surgery. Background Art

[0002] There are various forms of clinical medical organ intubation surgery. This invention mainly solves the problem of accurate intubation technology and avoids displacement of intubation instruments. Summary of the invention

[0003] A screwing, squeezing and fixing structure for a guide tube and a fixing tube is invented, so that the guide tube and the superhard guide wire are firmly fixed together, and displacement of the guide tube will not occur. The lumen of the guide tube can be in close contact with the guide wire, and the guide wire can pass through. The front end tip is formed, which is convenient for insertion into the organ. The front end of the expansion tube can be in close contact with the front end of the guide tube, and the expansion tube can pass through. After the rear end of the expansion tube is internally contracted, it cannot pass through the step after the diameter reduction and is stuck at the step level. The expansion tubes can be coaxially stacked and stuck at the step level after stacking. The intubation guide sheath is in close contact with the expansion tube, and can enter the organ after the expansion tube to achieve intubation or other instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Figure 1 The present invention is a schematic structural diagram of a coaxial expandable cannula guide that does not shift according to an embodiment of the present invention.

Claims

1. A coaxial expansion type intubation guide that will not shift, consisting of a guide wire, a guide tube, a fixing tube, an expansion tube, and an intubation guide sheath, characterized in that The guide wire is made of nickel-titanium core wire with outer covering material or stainless steel wire welding (1), which can be restored after being folded and will not form an angle (1); the end of the guide tube adopts a tip and a slit clamp structure with an outer wire design (2), and the front end of the fixed tube is covered with an inner wire structure (3), and the guide tube and the guide wire are firmly fixed together by tightening and extruding, and the displacement of the guide tube will not occur; the front end of the guide tube is formed with a tip (4), the tube cavity and the guide wire can be in close contact, and the guide wire can pass through. The guide tube has a step formed after the diameter is changed (5), and the diameter of the tube becomes thinner towards the rear after the diameter is changed (6); the front and rear ends of the expansion tube have an inner shrinkage (7), the expansion tube and the front end of the guide tube can be in close contact, and the expansion tube can pass through. After the inner shrinkage at the rear end of the expansion tube, it cannot pass through the step after the diameter change and is stuck at the step level. The expansion tube can be in close contact and inserted into a multi-stage coaxial stack (8), and is stuck at the step level after stacking; the intubation guide sheath has a negative pressure suction joint (9), and the front end has a diameter less than 0.89mm The side hole (10) of the sheath is in close contact with the dilation tube, and the dilation tube can be used to enter the organ, and intubation or other instruments can be used to enter the organ through the sheath.

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