Surgical Needles TRIZ Cases

A nested dilator, sheath, and inner guide reduce procedural steps by enabling advancement without fully retracting the puncturing element.

A dual-spring drive separates sensor insertion and retraction to reduce tissue trauma and improve placement consistency.

A rotatable actuator and toothed engagement fully retract injection needles, reducing tissue injury and shearing risks during withdrawal.

A pre-set shape-memory stylet helps an ablation catheter form continuous lesions for more complete pulmonary vein isolation.

A patient-fixed guide member provides a stable reference for positioning surgical instruments when direct visual access is obstructed.

Expandable deployment arms secure sheet-like biologic constructs, helping place the cell-seeded side toward tissue during delivery.

An elastomeric seal changes diameter during device exchange to balance reliable closure, low insertion force, and reduced fluid loss.

An acute-angle liquid jet detaches surface cells while suction carries droplets away, reducing tissue damage and sample mixing.

Rigid ports can press into wounds; a spacer-fabric wick routes fluid to a remote port for more comfortable NPWT.

A valve divider guides a preloaded stylet through a catheter connector while shielding valve faces from indentations, leakage, and damage.

A flexible catheter becomes rigid for fossa ovalis access, improving placement stability and reducing accidental needle exposure.

An ultrasound sensing assembly estimates catheter position so a steerable crossing tip can navigate venous occlusions while limiting vessel wall contact.

A transparent dissector keeps the energy tool visible during separation, reducing thermal-injury risk while preserving a pediculated bypass conduit.

Multiple conductive elements can slow GI access and complicate incision sizing; a single tubular element creates a drainage-ready opening.

See how electrical pulses irreversibly electroporate infectious cells around implants, sterilizing devices without thermal tissue damage.

Retraction nests the suction-collecting inner tube inside a flexible outer tube, helping protect intrauterine tissue from contamination during withdrawal.

A coaxial needle, stationary plunger, and translating extractor simplify plug deployment while reducing depth-adjustment errors and pneumothorax risk.

A rotating hollow tube cuts and retrieves tissue cores by smooth-surface adhesion, avoiding suction and helping preserve sample integrity.

Integrated electrochemical sensors and micro-actuators monitor cell metabolism and dispense drugs while limiting heat, tissue damage, and foreign body response.

Cap-mounted scrapers dislodge cut bone into a covered container, avoiding instrument transfer and reducing surgical interruptions.

An integrated endoscopic tool combines turbine-driven debriding with suction retrieval to collect multiple polyp samples without tool exchanges.

Opposing-side active and return electrodes support broad cutting and coagulation while reducing heat, tissue necrosis, and energy passage through the patient.

Multiple instruments and uncertain sampling depth complicate punch biopsy; an integrated tool combines excision, specimen release, and skin-glue closure.

An integrated syringe or vacutainer confirms medullary cavity access without disengaging the needle, preserving patency and reducing needle-stick risk.

A handle-actuated securing mechanism lets one hand hold animal identification or tissue-sampling devices, improving comfort and operating efficiency.

A projector-mounted luminous pointer and tunnel positioning aid support medical-instrument alignment in MRI with angular error below 5 degrees.

Learn how a microporous bioresorbable plug dehydrates and gels blood to control biopsy-tract bleeding, then resorbs over time.