Cannulas TRIZ Cases

A percutaneous ventricular assist device uses anastomosis devices to route oxygenated blood from the left atrium directly into the aorta.

A treatment tool exchanging device switches multiple medical instruments within a flexible insertion part using a dedicated control unit.

Tubular cutting device cores vein sections through small incisions using intravascular guides, reducing postoperative pain and infection risk.

A clip applicator deforms ligation clips around tissue within an anoscope slot.

Segmenting the needle with a nickel-titanium distal shaft prevents junction breakage and loss of the tip during medical procedures.

A medical manipulator features a movable arm and observation part with an objective optical system that shifts position relative to the arm tip.

A wound retractor with tapered rings captures the sleeve to hold position and maintain insufflation pressure during minimally invasive surgery.

An internal camera in a trocar provides visual guidance, resolving the trade-off between blind insertion accuracy and device complexity.

A single-pass expandable tissue dilator reduces muscle fiber severance and nerve root disruption during minimally invasive spinal procedures.

A microinvasive instrument set featuring an ablation device and shielding element for precise tissue removal.

An expandable bellows conduit and nested anchor resolve narrow cavity access challenges for endoscopic procedures.

An absorbent cleaning instrument with a tapered design captures fluid on trocar inner and outer walls, reducing lens obscuration and anesthesia time.

Nested inner and outer tubular portions allow controlled extension while maintaining a central passage for device insertion.

Segmented modular components with tactile feedback resolve manufacturing cost and installation uncertainty in negative pressure wound therapy systems.

An intermediary sleeve liner prevents sheath migration into radial cutouts, resolving the trade-off between electrical isolation and smooth articulation.

A laparoscopic disk assembly with a flexible support member forms an annular contact on the abdominal wall.

A surgical end effector loading device couples to a trocar and selectively retains an end effector for percutaneous delivery.

A removable treatment management apparatus attaches to injection devices and uses wireless communication to track administration events.

Helical threads on an outer sheath provide depth control while electrical impedance detects tissue boundaries to reduce organ puncture risk.

Elastic membrane portion inverts to create a double-layer seal, accommodating varying conduit sizes while eliminating kinking and contamination risks.

A segmented surgical apparatus uses wire transmission to enable precise distal tip movement through natural orifices.

A guide catheter with a distal deflection feature directs a guidewire at a predetermined angle, ensuring accurate balloon placement in sinus cavities.

A catheter features a movable partition within a single lumen to manage fluid flow paths.

Nested sheaths stabilize catheters against migration while Dacron cuffs reduce infection risks during exchange.

A tubular adaptor with a restricting plate switches an inner needle between locked and unlocked states via linear pushing motion.

A non-coring needle with a compact bevel face minimizes the insertion profile for implanted medical device access.

Conductive shield and cold instrument monitor detect stray electrosurgical energy, preventing capacitive coupling risks in single-port access surgeries.

A mechanical actuator drives linear oscillation of an instrument inside a guide member, reducing procedure time and cost compared to manual fenestration.

Segmented spiral protrusions on a hollow shaft reduce friction during linear movement while maintaining screwing action for efficient dilation.

Separable planar leaves establish a sterile access pathway, reducing dissection time and complication risks during revision surgeries.

Fracture elements in the hinge structure enable controlled rotation while maintaining channel integrity to prevent cable clamping.

Segmented flexible enveloping body centers offset instrument shafts within a trocar seal, preventing gas leaks during minimally invasive surgery.

A guide member directs an endoscope cable along a treatment tool operating part to enable single-handed visual field adjustment.

A U-shaped fixation clip with flexures prevents locking nut rotation, stabilizing the outflow graft assembly.

Segmented working channel accommodates multiple surgical instruments simultaneously within a single access port.

A compressible reservoir delivers irrigation solution through multiple nozzles to wounds.

An inverted flexible cover ensheaths clot material to prevent fragmentation and vessel wall trauma during retrieval from complex vascular anatomy.

A probe applicator stabilizes flexible endoscopic probes via a rigid shaft, enabling precise positioning in laparoscopic surgery.

Nested elastic tubes with control wires enable dexterous bending while maintaining structural stability against high orthopedic forces.

A tubular spinal device uses a pivoting guideway element to position an optics carrier near the proximal end.

Asymmetric endplate geometries match vertebral curvature to resolve malpositioning risks while integrated locking mechanisms secure alignment.

Segmented catheter structure transitions from straight insertion to curved operation, resolving maneuverability bottlenecks in tortuous arteries.

A bone tamp apparatus with movable elements expands the tamping surface area for effective fracture management.

An opaque central rod within a transparent obturator tip corrects image orientation, enabling clear tissue differentiation during minimally invasive surgery.

A therapeutic anoscope folds and secures rectal tissue to occlude vascular supply.

A pericardial access device uses a tissue-engaging member to manipulate the pericardium away from the heart surface.