Surgical Needles TRIZ Cases

Cold fluid infusion maintains pacemaker fixation fingers in an extended condition, resolving catheter lumen constraints during interventional delivery.

Integral thumb grip region with recess prevents slippage and rotation during surgery.

A reusable cautery body accepts a detachable cutter head containing the heating wire for safe disposal.

Segmenting the closure into a take-up spool and intermediary ferrule reduces closing force while preventing cancer cell seeding during retrieval.

A cell collection device uses a sliding sleeve to encapsulate bristles after sampling.

A medical diagnostic system measures bulk tissue conductivity during irreversible electroporation to guide subsequent treatment decisions.

Electrodes on the dilator enable precise transseptal puncture and electrogram recording, eliminating radiation exposure during cardiac procedures.

Adjusting microparticle diameter to 150-250 µm and surface density reduces image blurriness at depths greater than 5 cm.

A steerable medical instrument uses an inner tube to bend deformable outer and inner tubes, enabling precise curvature adjustment.

Segmented housing portions rotate independently to align fluid and electrical inlets, preventing cable tangling during endoscope maneuverability.

A Pixel Array Dermatome creates fractional skin plugs via a scalpet array for precise tissue resection.

Bearing and retaining collars deform a sterile wrapper to prevent impurity propagation between surgical instrument components.

Axial Kevlar reinforcing ribs embedded in the expansion section wall prevent tensile fractures during implantable device release.

A biopsy device marker delivery assembly uses a bevel drum to extend a pushrod through a cartridge.

Motor-driven integrated trocar eliminates manual handling delays and contamination risks during urgent intraosseous access.

Radiopaque positioning tools compensate for fluoroscopy image distortion by providing stable reference markers for accurate instrument placement.

Silver nanoparticles embedded in a Parylene coating release ions to provide durable antimicrobial protection for medical tubing.

Segmented light sources and separation walls guide illumination through a ring lens, reducing scatter while maintaining a minimal distal profile.

A probe-guide device integrates optical and needle components to enable real-time tissue identification and harvesting.

A microwave antenna with an intermediate impedance transformer matches transmission line energy to a distal radiating portion.

Reusable handheld device integrates imaging attachment and depth scale to guide disposable cartridge insertion.

Segmented strain gauges measure deflection of flexible medical instruments, correcting tracking errors caused by distal bending during image-guided procedures.

Measuring zinc and magnesium levels in microscopic calcifications resolves indeterminate cytology results from fine needle aspiration.

Ring supports on surgical forceps stabilize extended handles, reducing muscle effort by 30% while maintaining ambidextrous usability.

Optical imaging within a nested biopsy tube visualizes tumor margins, resolving imprecise needle placement from standard imaging limits.

A swab assembly uses a slidable sheath to cover the collection tip during insertion and expose it for sampling.

Nonmagnetic piezoelectric actuators enable MRI-compatible steerable needles, resolving automation conflicts with magnetic interference.

Inclined sampling cylinders collect epithelial layers from multiple peripheral corneal areas simultaneously.

A swiping element transfers tissue samples from a biopsy needle to a carrier medium, reducing device volume and handling complexity.

Unitary injection molding of the sheath and hub eliminates multi-part assembly alignment errors while maintaining structural strength.

Support member stabilizes atrial tissue to guide cutting device along defined path for accurate cannula placement.

A targeting method generates a second two-dimensional image from a three-dimensional data volume to define a suitable path for needle insertion.

Replacing articular joints with a Cartesian positioning system eliminates error accumulation, enabling precise multi-axis movement for invasive procedures.

A flexible steering platform with articulated links and connector elements enables precise multi-directional movement of surgical instrument working ends.

Elongate body features proximal and distal fixation members that transition from collapsed delivery to expanded anchoring configurations.

Radiolucent needles eliminate x-ray artifacts during breast biopsy, enabling accurate three-dimensional pathology localization.

Vacuum assisted biopsy needle integrates optical fibers to probe biological tissue properties during the procedure.

A 1.0 mm electrosurgical radiating tip delivers pulsed microwave energy to ablate biological tissue with minimal mechanical trauma.

Self-aligning polygonal surfaces in the cannula hub lock the electrode head to prevent repositioning errors, reducing nerve ablation procedure time.

Segmenting mold zones into indentations, troughs, and hinges creates vascular structures without complex multilayer assembly.

Nested support and pressing portions tension the mucous membrane to create a wider working space for endoscopic submucosal dissection.

Condensing vapor phase media transfers latent heat to tissue, preventing carbonization from direct electromagnetic exposure.

A disposable syringe attachment uses a pressure transducer and microprocessor to monitor injection forces in real time.

A star-configuration resistor model computes adjusted impedance values from multi-electrode voltage and current data.

Rotatable trocars guide mesh deployment to prevent injury, while motorized cutters spiral out debris to reduce procedure time.

A control unit detects DC-offset voltage changes to identify conductive tool presence in electrosurgical generators.

A cap member guide member restricts snare wire retraction toward the insertion portion, preventing loop collapse and ensuring accurate tissue resection.

Segmented electrode array applies electromagnetic energy to heat dermal collagen while preventing epidermal damage through independent power control.

A prostate biopsy needle features a bioactive coating layer that delivers controlled release of antibacterial agents directly to the insertion site.

A coaxial lead extraction device combines mechanical cutting and electrosurgical ablation to remove medical leads.