Surgical Needles TRIZ Cases

A primer, base, and lubricious top coating help surgical needles keep low tissue penetration force while resisting wear over repeated passes.

Chemical etching forms rounded surgical needle edges without mechanical sharpening, preserving hardness, enabling complex profiles, and reducing tissue trauma.

A fulcrum and barrier wall bend spinal needles to predictable angles, improving repeatability while reducing needlestick risk and tool use.

A ratcheting drive lets elongated medical instruments oscillate at low resistance while resetting the actuator when high resistance blocks reverse rotation.

Load-cell feedback and servomotor control improve swaging force and displacement precision to prevent needle cracking and weak suture attachment.

Opposing slit geometry in a single-piece gasket seals different interventional device diameters while reducing leakage and insertion friction.

Concentric conductive layers and flexible insulation help high-voltage catheters deliver sub-microsecond pulses while reducing arcing and tissue injury.

Flexible coaxial catheter layers and insulating regions deliver sub-microsecond high-voltage pulses while reducing arcing and tissue damage.

Retractable electrodes and insulating layers let flexible catheters deliver sub-microsecond high-voltage pulses while limiting arcing and tissue damage.

Photoelectric drive isolation and magnetic power isolation help multiple pulse switches synchronize during high-voltage switching.

Photoelectric drive isolation and magnetic power isolation improve multi-switch synchronization and response speed in high-voltage pulse generation.

Retractable electrodes and insulating regions let coaxial catheters deliver sub-microsecond high-voltage pulses while limiting arcing and tissue damage.

Square-wave energy delivery simplifies impedance monitoring, cuts power loss and peak voltage, and improves tissue sealing control.

An integrated carriage and insertion mechanism peels the protective sheet automatically, simplifying skin attachment and improving sensor placement accuracy.

A sheath-and-handle inserter places analyte sensors with less pain and more convenience, supporting discreet and more frequent glucose checks.

Optical fibers nested in a minimally invasive probe enable real-time tissue spectrophotometry in a compact head for diagnosis and monitoring.

A three-step needle and sheath actuation sequence improves biopsy sampling while limiting bacterial transfer, tip collision, and damage.

Circumferential shaft reliefs let surgical instruments bend while interlocking flexural members preserve axial stiffness and reduce rotational backlash.

A reversed heel edge and rounded inner needle surfaces protect hydrophilic guidewire coatings during insertion and withdrawal.

Real-time endoscopic image feedback verifies injection success and repositions the needle to improve ESD fluid delivery precision.

Projected treatment settings and lesion highlighting let clinicians keep alignment on skin while monitoring fluence, temperature, and frequency.

A shared 2D overlay shows target and actual biopsy needle positions together, improving alignment and helping avoid insertion depth errors.

Concurrent gas distribution across multiple trocars maintains constant pneumoperitoneum during smoke evacuation and suction, improving surgical visibility.

A core-drill cutting tip combines coring and aspiration to collect concentrated bone marrow from one entry point with less dilution and pain.

A cantilevered lip and anti-flexion support keep the cannula aligned, limit insertion depth, and allow visual tissue collection checks.

Biased stylet retention and friction within the cannula prevent premature marker release and preserve precise placement during procedures.

A retained cutting element in the jaw guide track prevents knife escape, jamming, and off-target cutting during tissue transection.

A removable cover supports the exposed adhesive sheet around a compression member, helping the skin-mounted patch stay attached during use.

Skin RNA captured by microneedles and analyzed with sequencing plus a trained algorithm helps predict psoriasis drug response.

A slit needle with tapered and tubular retained sections cuts puncture pain while strengthening hub attachment and simplifying assembly.

A skin-attached laparoscopic camera uses a manipulator and sealed connector to free the surgeon's hands while maintaining precise viewing.

A preinstalled sensor module simplifies skin attachment, while a reusable transmitter cuts disposable waste and cost in continuous glucose monitoring.

Controlled interphase and interpulse delays in H-FIRE pulses reduce bubble formation, arcing, and muscle stimulation while preserving tissue ablation.

A contoured sealed collector separates the urethra from vaginal fluids to improve sterile urine sampling and placement accuracy.

A biased inner retainer enables one-person medical device loading while reducing contamination risk and preventing accidental deployment.

A self-expanding spherical tissue marker resists migration under tissue pressure and stays clearly visible in X-ray and ultrasound.

Bulges and loose blocking rings secure tubular tissue against leakage and slippage while preserving blood circulation under peristaltic motion.

A rigid flange-mounted endoscope sampling trap preserves orientation, reduces sample loss, and simplifies one-handed suction collection.

Periodic switching between electrode sets and combined connections heats a wider tissue region more uniformly without repeated electrode replacement.

Real-time feedback adjusts pulsed electric fields to ablate tumors while limiting thermal injury, muscle stimulation, and side effects.

Dual feedback control keeps biopsy shaft depth stable during user movement, reducing overshoot and tissue damage in tough and soft tissue layers.

A visual tip cue and rotatable cutting unit enable single-pass vessel harvesting with less conduit injury and fewer tool exchanges.

Dual cooling and refrigerant injection limit tip overheating and tissue carbonization while expanding ablation range and shape control.

A spring-biased sensor inserter aligns and deploys an electrochemical sensor quickly to reduce pain and support frequent glucose monitoring.

A cervical stop limits uterine insertion depth while brush abrasion and suction improve specimen collection with less tissue trauma.

A retracting needle cartridge lets users insert glucose sensors or infusion units, then discard the sharps safely at home without biohazard return.

A magnetic obturator draws an implanted marker into an introducer for accurate minimally invasive removal with less patient burden.

Controlled tissue extraction through hollow needles and suction tightens lax skin while avoiding the invasiveness and healing burden of surgery.

A flexible needle and clamping assembly enable angle-adjustable ablation without CT guidance, reducing radiation exposure and complication risk.

A targeting device selects a two-dimensional image slice to determine a direct path and records fluoroscopic images for efficient object movement control.

Vibrating irrigation tube directs cooling fluid to release steam bubbles, stabilizing tissue temperature and reducing charring risk.

A rotatable sampling element with a cylindrical receiving chamber cuts and secures tissue samples via a flexible drive shaft.

A humeral landmarking apparatus uses fixed distance placement circles to guide intraosseous needle positioning.

A biotissue sampling apparatus injects medicine through an aspirating hole during needle insertion to extract solid and fluid tissue samples.

Insertion device prevents accidental detachment and allows controlled release of stored energy to improve tissue fixation.

Removable PET detection panels surround breast tissue to capture 360-degree data samples, resolving limited spatial resolution in early-stage lesion imaging.

A biological tissue removal tool uses a radially movable retention member to capture specimens within its lumen.

A guidewire assembly uses a flexible preset spatial geometry to puncture the pericardium while deflecting away from the myocardium.

An electrosurgical system uses a dynamic identification circuit to adjust RF output for specific electrode assemblies.

A numerical model estimates 3D treatment volumes by monitoring current delivery and deriving conductivity ratios from tissue-specific electrical properties.

Segmented insulation on the electrode creates a focused ablation zone that minimizes non-target tissue damage during radiofrequency procedures.

Simultaneous needle and sheath insertion reduces tissue damage and bleeding risks during multi-lumen catheter placement.

A telescoping needle system uses a shielded inner element for precise intradiscal therapeutic delivery.

A locking mechanism stabilizes the endoscope forceps elevator at maximum angular positions using elastic engagement.

A memory metal split-shaped needle tubing expands after puncture to expose the optical fiber, reducing vascular trauma during deep-seated tumor treatment.

Integrated fluted bone screw merges fixation with fluid delivery to prevent extravasation.

A rotating leaflet mechanism maintains incision openness during implantable cardiac monitor deployment, resolving tissue tension challenges.

A reusable first compartment mates with a disposable second printed circuit board to harvest epidermal tissue via suction and thermal control.

Repositionable collimation sections enable real-time biopsy guidance, resolving co-registration challenges in dense breast tissue.

Segmenting the instrument into a reusable handle and disposable needles reduces surgical trauma by eliminating multiple trocar incisions.

An anal swab device employs a bulbous head and sliding plunger mechanism to collect samples while preventing dislodgment during transport.

A coordinate mapping system locates subchondral bone defects using a radial grid template overlaying anatomical landmarks.

Concave cutting surfaces on a trocar shaft minimize internal angles to maximize penetration force, resolving straight-line blade limitations.

Alternating current oscillation between divided needle electrodes prevents magnetic field cancellation in skin care devices.

A reinforced force and torque transmission hose uses longitudinal tension elements to increase tensile rigidity.

An elongated hydrogel implant replaces the nucleus pulposus to restore disc mechanics while preventing expulsion via nested containment structures.

A transapical removal device elongates implanted valve clips for extraction through smaller catheters.

A blunt microwave ablation antenna compresses ground-glass opacity lesions without puncturing lung tissue.

Perpendicular coupler actuation increases closing leverage while maintaining compact length for limited access.

A multi-layer dressing device integrates a slit pad and transparent film to secure catheters while maintaining site visibility.

A coring biopsy needle uses simultaneous axial and rotational movement to collect tissue samples.

A retrieval frame translates arm pivoting into snare wire linear motion for precise medical implant extraction.

Automated biopsy specimen management system links patient data to container identifiers using portable computing devices.

Console integrates needle magnetizer and RFID reader to reduce landfill waste from disposable components.

Electromagnetic tracking and predictive modeling guide percutaneous tools through patient respiratory motion.

Segmented spinal retractors distribute pressure evenly via smooth oblong channels, reducing localized retraction pressure and tissue damage.

Electrical pulses induce irreversible cell membrane permeabilization, eliminating uncontrolled thermal spread from blood circulation during tissue ablation.

A rigid attaching element fixes the instrument guide device to the subject coil, removing registration steps.

Sliding components adjust the cavity length to collect longer, representative tissue samples in a single procedure, eliminating the need for multiple biopsies.

A skin incision instrument uses a reader to orient expanders for precise microscale cuts.

A catheter-based cutting device expands to form a self-regulating shunt, reducing left atrial pressure and alleviating heart failure symptoms.

Radial arm expansion unfolds grafts through trocars, preventing damage and reducing recurrence rates during minimally invasive hernia repair.

An oval cross-section needle minimizes insertion force and tissue trauma to reduce patient discomfort during continuous glucose monitoring.

An isolated coaxial needle and conductor confine electrical energy to the bleeding site, minimizing surrounding tissue damage and re-bleeding risk.

A ratcheting mechanism enables oscillating rotation of elongated medical instruments through a helical ridge and biasing actuator.

Track-guided conductor movement enables precise microwave ablation while minimizing tissue damage.