Surgical Needles TRIZ Cases

Integrated holding forceps stabilize tissue to prevent perforation while a thermal surface controls bleeding without separate hemostats.

Nested electrode tines reduce cannula profile, enabling larger ablation areas without increasing device complexity.

A puncture planning apparatus simulates needle movement and organ deformation to plan optimal insertion paths.

Occlusive dressing prevents fluid intake via pressure differential while enabling outflow, eliminating contamination risks from check valves.

Segmenting the syringe into rigid and flexible portions resolves the contradiction between structural strength and ease of operation for viscous fluids.

Segmented flexible catheters with piezoelectric vibrating needles reduce puncture force while adapting to patient anatomy.

A flexible outer cannula with a rigid inner stylet prevents bending during insertion and adapts to patient movement to reduce dislodgment risks.

Segmented housing and intermediary fluid preserve sample integrity while spring mechanisms ensure efficient extraction.

Varying electrode wall thicknesses and interposed insulation members prevent buckling during manipulation while minimizing tissue trauma.

Rotationally coupled shafts in the transport system enable precise septal wall engagement, reducing interference with adjacent heart structures.

Electromagnetic induction transfers energy to a MEM device, bypassing tissue attenuation limits of RF radiation while removing the need for internal batteries.

A biopsy device handle modifies the housing from an expanded loading configuration to a compact delivery profile.

A microwave emitter assembly uses a shunt to transfer heat from the distal shaft.

Sliding a camera tube within a needle sheath eliminates external cannulas, reducing insertion pain while maintaining high-quality image acquisition.

A retractable cannula shields the implant during delivery, preventing tissue trauma and device dislocation in subcutaneous pockets.

A bone staple insertion tool uses a fulcrum and force applicator to expand staples just before implantation.

Integrated lever mechanism in tilt wheel releases brake action with one hand, resolving cumbersome operation caused by reaction forces.

A cannula-stylet assembly uses a long stylet to extend through the cannula and gripping device.

Dual lumen needle enables precise aspiration of sperm from the rete testis space under real-time ultrasound visualization.

Segmented tunneling stylets with bifurcated segments reduce tissue trauma during hemodialysis catheter insertion by enabling secure, reliable lumen engagement.

Integrating vacuum and pressure pumps into a single handpiece resolves the trade-off between procedural versatility and system complexity in biopsy devices.

A medical instrument shaft adopts a three-dimensional spatial configuration to reduce mutual obstruction between multiple tools.

High-frequency pulsed-wave Doppler system using a PMN-PT needle transducer measures blood flow velocity in retinal vessels.

Segmented upper and lower plate elements detach via a lateral frame mechanism, preventing intracorporeal needle misalignment during extraction.

A slidable electrode moves within a non-conductive housing to deliver precise electrical current for surgical cutting and coagulation.

An adjustable cutting wire inside a hollow needle maintains tumor shape during removal, enabling precise pathological examination of resection margins.

Applying specific electrical potentials to cartilage drives electrochemical reactions that alter tissue shape without mechanical trauma, reducing healing time.

A handheld biopsy device integrates a self-contained pressure and vacuum generator to automate tissue sampling.

A microwave applicator uses a guide sleeve to circulate cooling fluid around the transmission line for precise temperature control.

An endoscopic device forms anastomoses using vacuum seals and radial expansion to join internal tissues without mechanical fasteners.

A dual-mode tissue ablation needle merges pulsed electric field and radio frequency energy into one device.

Non-stick coatings prevent tissue adherence while grounding the hollow needle reduces electromagnetic interference during microwave energy delivery.

A continuous thermal process relieves residual stresses in curved suture needles to improve bending stiffness and yield moment without causing oxidation.

A pressure regulator with a compliant tube temporarily stores returning gas, avoiding transient pressure deviations from mechanical ventilation or coughing.

Rotatable coupling parts lock the cannula and stylet to prevent accidental piercing during loading into reusable biopsy guns.

Spring-loaded film strips encase biopsy needles to prevent sticking, resolving safety complexity trade-offs via segmentation.

A biopsy needle arrangement locks the tip to the sheath, ensuring a closed state during insertion.

A scatter determination unit calculates ultrasound pulse scatter values to detect fluid perfusion changes in biological tissue.

Negative pressure pulls septal tissue toward a stationary needle, reducing opposite wall perforation risk during transseptal access.

A biopsy stylet embeds optical fibers within a longitudinal groove to guide radiation for spectral analysis.

A tilt-controlled grid mechanism uses levers and cams to translate rotational input into linear and rotational needle guide movement.

Integrating a porous specimen collector into the sterile drape enables automated deposition, reducing manual intervention and lowering procedural costs.

A biopsy device uses a translating shuttle valve assembly to manage vacuum pathways within the needle lumen.

A micro-perforated polymeric dressing secures a compressible impermeable strip to contain blood flow, reducing bleeding time and bacterial contamination risk.