Catheter TRIZ Cases

An electroformed pleated catheter tip improves tissue contact and bendability while preserving kink resistance, sealing, and sterilizability.

A flexible membrane regulator buffers evacuated-tube vacuum spikes to prevent vessel collapse and maintain stable blood collection flow.

ADC-DAC ECG routing lets digital instruments process filtered signals while preserving analog output for legacy medical recorders.

A differential ADC and transimpedance amplifier isolate tiny electrochemical currents from bias offsets for accurate, low-power continuous monitoring.

Pulsed RF range gating with injection-locked oscillation improves breathing and heart-rate sensing while reducing false triggers and interference.

A rated break location forms a narrow exposed cutting edge, simplifying overmolded electrode manufacture while improving current concentration.

An op-amp-less delta-sigma potentiostat and efficient impedance circuit cut implantable CMOS chip power to about 50 nW while preserving speed and low noise.

A preformed breaking point enables low-force separation after overmolding, creating a precise cutting edge with concentrated current and lower tissue damage.

A DPDT multiplexer switches each ECG channel through a reference voltage first, cutting switching noise and improving signal clarity.

Pulsed RF range gating with a dielectric resonator oscillator cuts false triggers and improves respiration and heartbeat sensing at defined ranges.

A differential amplifier with variable resistance cuts OHRM circuit footprint, power use, noise, and slow high-gain response.

Separating steady and non-steady signal components lets this adaptive filter suppress pulsation noise with less processing load and delay.

Integrated electrodes on C-shaped basket spines simplify catheter assembly, improve alignment, and support reliable IRE tissue contact.

Integrated lead wires and optical channels turn small-bore medical connectors into power and data interfaces for sensing and monitoring.

Deployable conductive tines stabilize cardiac contact and shape the electric field for transmural irreversible electroporation with less thermal injury.

Resilient splines and a retractable puller let one catheter shift from compact to expanded forms for better cardiac mapping and ablation contact.

Mechanical interlocking secures basket catheter electrodes to spines without solder, welding, or adhesives, improving alignment and assembly reliability.

An inflatable balloon with irrigation holes improves basket catheter cooling, displaces blood, and helps prevent clot formation during RF ablation.

Triangular tapered basket catheter electrodes align on adjacent spines to increase electrode count while still fitting inside the sheath.

A balloon catheter cools target nerves through a vein to create predictable cryolesions, limit tissue injury, and reduce imaging dependence.

Automated OCT lumen border detection enables vascular resistance assessment and stent placement simulation without manual tracing.

An occluding catheter isolates a lung segment and measures exhaled volume during assisted ventilation to speed collateral ventilation assessment.

Distributed shaft magnets let an irrigated ablation catheter bend without kinking, improving positioning accuracy and stable tissue contact.

Spatially overlapping catheter electrodes replace a reference catheter, enabling accurate 3D heart activation mapping with one insertion.

Resilient splines and a retractable puller let one catheter shift from navigation to expansion for conformal cardiac contact and lower trauma risk.

Polymer blocking and diffusion-limiting layers improve microneedle CGM sensitivity while reducing interferent noise, pain, and signal latency.

TCSPC with reference-photon timing enables absolute HbO2, HHb, and oxCCO measurement despite weak CCO signals and spectral crosstalk.

Redundant electrodes and parallel signal checks detect implantable glucose sensor failures, improving monitoring accuracy and continuity.

An initial blood draw is diverted into a vented sequestration chamber to limit culture contamination, false positives, and unnecessary antibiotics.

EP signals and local activation times are split into tissue sections to derive cardiac wave propagation vectors for faster arrhythmia mapping.

A buffer-filled catheter purges blood from the sensor between readings, limiting degradation and protein buildup while preserving measurement access.

Hydrophilic coatings and a nested dual-catheter layout improve trackability and aspiration in tortuous vessels while reducing device changes.

A septum access port and advanceable flow tube enable blood draws through vascular access devices while staying compatible with needle access connectors.

An onboard-powered implantable sensor sends physiologic data to an implant or external receiver without patient action, enabling real-time therapy adjustment.

A deformable solid insert grips different catheter sizes securely without pinching, helping maintain flow and reduce contamination risk.

A collapsible sleeve housing keeps an intermittent catheter sterile before use and helps prevent urine leakage after removal.

A coaxial tip carries RF and microwave energy together to enable precise tissue resection, spherical ablation, and lower blood loss.

Graduated distal cut-away ratios increase microcatheter flexibility in tortuous vessels while preserving pushability, torque response, and wall integrity.

Electrical parameter clustering calibrates glucose sensors in vitro, reducing in vivo calibration time while improving accuracy and reliability.

Non-ionizing electromagnetic pulses and dielectric image reconstruction improve small-vessel angiography for mobile or wearable assessment.

A crimped locking stub secures barrel electrodes to catheter spines without soldering or adhesives, improving alignment and assembly reliability.

A unitary basket with an atraumatic tip electrode cuts complex spine assembly, improving bond stability and enabling cardiac IRE ablation.

Coupled tendons link orthogonal joint pairs to expand bending range while keeping surgical instrument articulation smooth, precise, and less complex.

A one-way tapered applicator and tray assembly prevents tilt and misalignment, simplifying sensor insertion while improving monitoring reliability.

Specific-wavelength light modulates foreign body response around subcutaneous devices, limiting fibrosis and improving sensor accuracy and life.

A variable braid transition lets a guide catheter stay flexible in tortuous vessels while adding shaft rigidity for device engagement and delivery.

A pressed contact layout lets the sensor body reliably engage PCB contacts, simplifying CGM assembly while reducing contamination and defects.

A baffle in the saline flush tube counters vacuum tube pressure to reduce hemolysis, prevent catheter collapse, and avoid stuck needles.

A ribbed collar and larger distal sheath help maintain coronary access and guide catheter alignment despite heart motion.

A unitary planar-sheet basket with converging linear spines simplifies electrode alignment while improving tissue contact and current delivery.

A catheter embeds reinforcements between inner and outer layers to maintain structural integrity during insertion.

A drive mechanism with finite range motion grips and advances elongated medical members.

A glucose sensor calibration method adjusts sensitivity using an offset value and averaged historical data to refine measurement accuracy.

An implantable catheter eliminates external openings to reduce peritonitis risk while using a dual-layer perforated sheath to prevent omentum blockage.

A vertically aligned multi-walled carbon nanotube probe measures hydrogen peroxide oxidation currents to identify cancerous tissue regions.

An NMR system detects water proton signals to assess vascular volume, replacing invasive blood sampling with non-invasive physical parameter analysis.

A helical cutter assembly conveys occlusive material proximally along a catheter body, preventing debris embolization during plaque removal.

Heating the resin below its melting point triggers thermal contraction, fixing the coil layer to resolve kink resistance and tensile strength trade-offs.

Applying separate internal and external energy sources treats the annulus fibrosus while minimizing surface damage caused by penetration.

A helically cut inner catheter tube transmits axial force while allowing flexible bending.

A radial artery compression device uses a fluid-filled bladder to apply continuous pressure for hemostasis.

Multi-diameter channels and frictional straps restrict catheter movement, reducing infection risks while maintaining fluid flow.

Expandable centering device prevents vessel wall compression to mitigate arterial insufficiency and enable fluid locking.

Analyte monitoring system filters temporary post-prandial spikes by evaluating glucose rate-of-change and duration before triggering alarms.

A retractable track connector mechanism guides elongate flexible medical instruments within a catheter robot drive module.

Polyether polyols and 3,3′-thiodipropionic acid stabilize aromatic polycarbonate against ionizing radiation yellowing during sterilization.

A wearable sensor switches between high and low power modes based on detected health device usage to optimize energy consumption.

Detect venous pulsation artifacts in plethysmographic waveforms to correct blood oxygen saturation accuracy at non-extremity sites.

A cryoablation catheter integrates a balloon with a freezing element to deliver working cryogen fluid directly to target tissue.

Varying the core outer diameter along the fiber length captures light signals despite misalignment, ensuring accurate blood pressure measurements.

Spaced electromagnetic coils on a catheter body transmit and receive signals to detect proximity changes, preventing dangerous knotting in pulmonary arteries.

Vapor-deposited parylene barrier prevents plasticizer leaching from phthalate-free PVC tubing, maintaining flexibility and durability.

A cardiac mapping catheter employs an organization detection algorithm to analyze electrical signals and determine velocity vectors for endocardial surface visualization.

Expandable cryotherapy element cools nasal tissue to treat headache disorders without invasive procedures.

A hinged suture clip with side handles and a central aperture resolves fixation stability conflicts by enabling tool-free repositioning of medical devices.

A lancing device uses a single return spring to move the control member back to its wait position after lancet detachment.

A wire management coupler guides conductors closer to the neutral axis of a catheter shaft using cutouts and heat shrink material.

A reference voltage circuit uses sub-threshold NMOS operation to generate stable bias signals with minimal energy draw.

A medical tubing securement assembly uses a rotatable locking adapter to hold tubes within a base disc.

A multi-marker electrochemical impedance spectroscopy sensor uses tuning elements to alter molecular recognition element frequencies.

Calibration system aligns minimally invasive glucose readings with invasive reference data to establish accurate baselines.

Digital anti-aliasing filtering and ambient temperature compensation maintain measurement precision across varying sensor sensitivities.

A control system detects electrogram activation candidates and assigns costs to potential sequences for rhythm identification.

A pulse oximeter detects venous pulsation by measuring the phase difference between infrared and red light signals.

Frequency domain analysis of peripheral venous pressure detects hypovolemia and systemic vascular resistance without invasive central catheters.

An apertureless cylindrical jacket provides symmetrical torque transfer for precise navigation while axial openings allow fluid access to the sensor element.

Continuous analyte sensor transmits interstitial fluid data to a mobile device that processes trends and relationships between glucose levels and user events.

A flexible sensor with a degradable adhesive enables continuous fluid flow monitoring while allowing easy removal after the procedure.

Elastic tension spring compensates for tube length changes caused by leg motion, reducing pistoning friction and bladder irritation risks.

Rotating head sparges cryogenic fluid onto skin, reducing treatment duration and preventing tissue damage.

A catheter assembly navigates bifurcations using a slidable mandrel and flexible end portion.

A flexible substrate electrode assembly wraps around a lasso catheter spine to position sensors for simultaneous tissue and blood signal acquisition.

A signal processing apparatus estimates user state using multimodal biological signals and sensitivity adjustments.

Segmented tubular bodies with planar steering resolve versatility complexity trade-offs by enabling precise navigation through tortuous anatomical paths.

A hinged cover exposes the lancet to minimize pain while ensuring sufficient blood flow for accurate glucose monitoring.

Non-rigid-body warping of 3D overlays using intravascular device shape tracking resolves soft tissue deformation inaccuracies during interventional procedures.

A sensor device measures tissue glucose levels using a moving horizon estimation method to correlate measurements with blood values.