A kind of cutting device axially expanded for ureterTechnical field
The utility model relates to a kind of medical instruments for prostatectomy.
Background technique
Ureterostenosis is clinical common disease, ureter tube cavity segment caused by it refers to because of a variety of causes or full section compared withIt is normal narrow, although the continuity of lumen is not interrupted, cause different degrees of upper urinary and uronephrosis.UreterIt is narrow to cause decreased renal function and infection.It is exactly clinically to restore ureteral lumen continuity to the orientation treatment of ureterostenosisAnd its function, obstruction is released, infection, redemption and protection renal function are eradicated.
Method currently used for releasing obstruction, comprising: 1) percutaneous renal puncture row narrow positions is cut；2) balloon expandable or defeatedUrinary catheter ductal ectasia；3) excision narrow do again end to end anastomosis (if cut-out is too long, need other organ-tissues intoRow is shaped for ureter)；4) laser is cut.In these methods, the first is only suitable for, and position is higher and needs are in body surface apertureDo the high percutaneous renal puncture of risk；There is recurrence second more；The third range of operation is big, wound is big；4th kind of thermal damage's modelEnclose big, narrow recurrence caused by more having therefore.
Because of the present circumstance, it is therefore necessary to design a kind of new instrument to improve therapeutic efficiency, surgical injury is reduced, hand is acceleratedThe art time；To benefit patient and medical staff.
Utility model content
The utility model, can be well in view of this, provide a kind of cutting device axially expanded for ureterMeet actual use demand.
A kind of cutting device axially expanded for ureter has the bar shaped feeler lever of rigidity, and the lower section cross section of feeler lever isCircle, feeler lever are gradually collapsed into the single cutting tool sheet with knife spine from the bottom to top, do not put the first edge on a knife or a pair of scissors or put the first edge on a knife or a pair of scissors at the blade of feeler lever；It visitsThe top of bar has fillet；It is located at the saw kerf that indent is provided at blade on feeler lever, for cutting urethra when in use.
The saw kerf quantity is not limited to one, preferably 1-5.
When saw kerf quantity is multiple, the size of saw kerf is from top to bottom to be gradually increased.
When saw kerf quantity is multiple, saw kerf is using the blade on feeler lever as center line, and saw kerf is in blade two sides successively staggered rowColumn.
Step-like linkage section is additionally provided in the tail end of feeler lever, for being connected to ultrasonic transmitter.
Working principle
When in use, the tail end of feeler lever and common ultrasonic transmitter (Pneumatic Lithotripsy equipment) in the market are connected to oneIt rising, feeler lever is stretched at ureterostenosis, start ultrasonic transmitter, feeler lever carries out the vibration in the front-back direction of high frequency, thusThe ureter tube wall of stenosis is cut.
The utility model structure is simple, is skillfully constructed, is easy to use, and scheme has obvious excellent compared to the prior artGesture:
1, it is cut compared with laser, does not generate heat in use, carry out circulating cooling without a large amount of physiological saline,Therefore also it is not present due to thermal injury risk, hence it is evident that narrow caused by reducing therefore to send out again；
2, it can be applied to full ureterostenosis, for super upper fragment position, without carrying out the percutaneous renal puncture of high risk；
3, instrument reaches narrow positions by human body natural's vestibule (urethral orifice, bladder, ureter) and operates, and passes throughJourney injury of human almost without.This new instruments is worth with good application and popularizations.
Detailed description of the invention
Below in conjunction with attached drawing, the utility model is described in further detail
Fig. 1 is a kind of schematic perspective view of the cutting device axially expanded for ureter of the utility model.
Fig. 2 is a kind of cutting device use state diagram axially expanded for ureter of the utility model.
Fig. 3 is a kind of cross-sectional view of the cutting device lower section axially expanded for ureter of the utility model.
Cross section when Fig. 4 is a kind of cutting device upper section stereoscopic-state axially expanded for ureter of the utility modelSchematic diagram.
Fig. 5 is a kind of overlooking state schematic diagram of the cutting device upper section axially expanded for ureter of the utility model(using the blade on feeler lever as center line, saw kerf is staggered saw kerf in blade two sides).
Specific embodiment
Referring to attached drawing 1-5, a kind of cutting device axially expanded for ureter has the bar shaped feeler lever of rigidity, feeler lever1 cross section of lower section is circle, and feeler lever is gradually collapsed into the single cutting tool sheet with knife spine from the bottom to top, at the blade of feeler lever notIt puts the first edge on a knife or a pair of scissors or puts the first edge on a knife or a pair of scissors；The top 2 of feeler lever has fillet 2-1；It is located at the saw kerf 2-2 for being provided with indent at blade on feeler lever, is used forUrethra is cut when in use.
The saw kerf 2-2 quantity is not limited to one, preferably 1-5.
When saw kerf 2-2 quantity is multiple, the size of saw kerf 2-2 is from top to bottom to be gradually increased.
Saw kerf 2-2 quantity be it is multiple when, saw kerf 2-2 using the blade on feeler lever as center line, saw kerf 2-2 blade two sides according toIt is secondary to be staggered.
Step-like linkage section 3 is additionally provided in the tail end of feeler lever, for being connected to ultrasonic transmitter.
Application method
When in use, the tail end of feeler lever and common ultrasonic transmitter (Pneumatic Lithotripsy equipment) in the market are connected to oneIt rising, feeler lever is stretched at ureterostenosis, start ultrasonic transmitter, feeler lever carries out the vibration in the front-back direction of high frequency, thusThe ureter tube wall of stenosis is cut.