The invention relates to a method for making a soft headend ureteral guide sheath

The invention relates to the field of medical devices and specifically to a soft headend ureteral guiding sheath.

Background technology:

The ureteral guidance sheath is the core instrument for endoscopic urology. It can dilate the ureter and maintain the ureteral passage for injection and aspiration of fluids and the insertion and removal of endoscope-related instruments.In use process, the sheath body through the urethra, bladder after intervention ureter, the original after ureteral outflow of urine and other liquid will be produced during surgery through the cavity flow sheath, existing products in the proximal tray has not set up effective liquid drainage and recovery unit, therefore surgical instruments and environmental vulnerable to effluent pollution, affects the operation efficiency, reduce the safety of operation.

The stiff tip of the existing guidance sheath may damage the ureter.On the other hand, there is no drainage hole in the body of the traditional guidance sheath, and it is easy to lead to extreme bladder expansion when the operation time is increased, which increases the probability of vesicoureteral reflux.

Technical realization elements:

The technical problem to be solved by the invention is a soft headend ureteral guiding sheath which can avoid the risk of damaging the ureter.

The technical solution of the invention is as follows:

The invention relates to a soft headend ureteral guidance sheath, which includes a body and an inner core of the guidance sheath, both of which are tubular structures.

The head end of the inner core of the guidance sheath is made of a soft material and is used for inserting the ureter of the patient.The head end of the inner core of the homing sheath is inserted into the homing sheath body and beyond the head end of the homing sheath body;The head end of the inner core of the guiding sheath is a conical structure;

The inner core of the guiding sheath and the inner cavity constitute a channel through which the ureteroscope passes;

The end of the inner core of the seeker sheath is provided with a clip for attaching to the end of the seeker sheath body.

Furthermore, a number of bladder drainage holes are arranged near the preset distance of the end of the guiding sheath body.

Further, the end of the seeker sheath body is in the shape of a trumpet mouth which is gradually enlarged away from the head end of the seeker sheath body.

Further, the head end of the inner core of the guide sheath is made of soft silica gel.

The hardness of the inner core of the seeker sheath is greater than that of the seeker sheath body so as to facilitate the passage of the inner core of the seeker sheath through the seeker sheath body.

The inner wall and outer wall of the guiding sheath body are coated with a lubricating biological coating.

In this way, when the body of the seeker sheath is wrapped outside the inner core of the seeker sheath, it is inserted into the ureteral bladder and other organs of the patient to reduce the stimulation and injury to the patient.At the same time, the lubricating biological coating on the inner wall of the homing sheath body makes it easy for the inner core of the homing sheath to pass through the homing sheath body.

The inner core of the guiding sheath is made of soft silica gel material. The inner core of the guiding sheath is set with a guide wire through a guide wire channel. The entire ureteral guiding sheath is inserted into the ureter of the patient by operating the guide wire.

Specific mode of implementation

The head end of the guide sheath core 2 is made of soft silicone material, which is used to insert the ureter of the patient.The head end of the homing sheath inner core 2 is inserted into the homing sheath body 1 and beyond the head end of homing sheath body 1.The head end of the guide sheath inner core 2 is conical;

The inner core of the guide sheath (2) is composed of an inner cavity that enables the passage of the ureteroscope.The inner core of the guide sheath with a built-in guide wire ensures its strength can be inserted into the ureter of the patient.

The end of the inner core 2 of the seeker sheath is provided with clip 21 which is used to clip the end of the seeker sheath body 1.

Several bladder drainage holes are arranged near the preset distance of the homing sheath body 1.The terminal distance between bladder drainage hole 11 and seeker body 1 was set according to the patient's gender and body type.

Urination was carried out through bladder drainage hole 11, seeker sheath body 1(postoperative) or bladder drainage hole 11, seeker sheath body 1 and inner core 2 (intraoperative) to form an infusion channel.This prevents the guiding body from completely blocking the ureter and causing the ureter to swell.

The end of seeker sheath body 1 is in the shape of a trumpet mouth gradually expanding along the direction of the head far away from seeker sheath body 1. This shape is convenient for the inner core 2 of the seeker sheath to be inserted from the end of seeker sheath body 1 and to form a clamping fit with clip 21.Preferably, clip 21 is in the shape of a clip. The movable end of clip 21 is clamped at the horn mouth edge of the end of the seeker body 1 under the action of its own tension.

The hardness of seeker sheath inner core 2 is greater than that of seeker sheath body 1 to facilitate the passage of the seeker sheath inner core through the seeker sheath body.

The inner and outer walls of the guide sheath body 1 are coated with lubricating biological coating.In this way, the body of the guiding sheath is inserted into the ureteral bladder and other organs of the patient when it is wrapped outside the inner core of the guiding sheath to reduce the stimulation and injury to the patient.

Guide wire channel 22, light source channel 23 and imaging channel 24 are also arranged in the inner core of the guidance sheath 2. Even the guide wire, light source fiber and imaging fiber of the ureteroscope can pass through.

The guide wire, light source fiber and imaging fiber are used to connect the part of the ureteroscope that enters the patient's body and the part in the patient's body that is used for display and control, so as to facilitate the operation of grasping stones and imaging during the operation.

During operation, the part of the ureteroscope inserted into the body of the patient, together with the guide wire and fiber, is passed through the inner core of the guiding sheath 2 to the head end of the inner core of the guiding sheath 2, and the inner core of the guiding sheath 2 is then passed through the body of the guiding sheath 1.Preferably, calibration marks can be set outside the seeker body 1 to observe the length of the entire device entering the patient.The doctor can directly adjust the operation according to the observed ureteral conditions, so that the ureteroscope can be placed in an ideal position of the ureter more easily and more safely, so as to create more ideal operating conditions for the ureteral hard endoscopic surgery, and to avoid the risks of operation failure and ureteral injury caused by blind implantation.It can reduce the psychological burden of patients, reduce the difficulty of operation, improve the precision of operation, and improve the safety and effectiveness of treatment.