Cannulas TRIZ Cases

An expandable catheter tip seals against vessel walls to create a large opening for clot reception, preventing backflow and dislodgement during aspiration.

Independent barrel rotation adjusts the operation area without rotating the fixed endoscope, preventing interference and reducing patient injury risk.

High-purity tin plate retractors adapt dynamically to surgical sites, resolving the trade-off between small insertion diameter and flexible field maintenance.

A lighted cannula system uses a highly polished luminal surface to guide LED illumination toward the surgical site.

A segmented overtube slider allows independent endoscope and tool movement to resolve mechanical complexity and air supply interference.

A surgical access port circulates chilled fluid through internal conduits to cool tissue.

A trocar nozzle directs a high-speed insufflation gas stream to create a dynamic pneumatic seal around surgical instruments.

A surgical tool insertion aid uses slidable inner tubes to enable flexible instrument exchange.

Expandable struts create a retraction canopy to improve visualization and reduce tissue disruption during minimally invasive procedures.

A multi-lumen cannula merges saline supply and waste removal channels within a single incision site.

Mechanical fluid disruption removes protective biofilm layers without damaging underlying tissue, improving chronic infection treatment outcomes.

Pivotable platform establishes known geometric reference points to resolve instrument positioning ambiguity in minimally invasive surgery.

A magnetic wing mechanism pivots to anchor a surgical access device, resolving position stability issues in pressurized environments.

A nose stud needle tip features a bendable joint that allows the tip to flex after perforation.

An internally driven gear train in a robotic arm provides degrees of freedom to access abdominal quadrants through a single incision.

An expandable needle head transitions from a small insertion profile to a larger working diameter for therapeutic delivery.

A multi-lumen tube set connects to a vacuum source and branching conduit to evacuate smoke during laparoscopic procedures.

A camera support tube joins an imaging unit and secures to the body surface via a rotatable fixing tool.

An offset conductive member creates reliable electrical contact between a shaft and probe, eliminating hot spots from poor connection during RF lesion creation.

Segmented surgical tools facilitate minimally invasive LVAD implantation, avoiding sternotomy adhesions to simplify future heart transplants.

A magnetic-anchored robotic system provides seven-degrees of freedom movement for surgical instruments within the abdominal cavity.

A segmented sealing gland uses an iris diaphragm to accommodate varying tool diameters, reducing mechanical failure risks in endoscopic procedures.

A deformable surgical access device with flanges compresses for insertion and expands to engage vessel walls.

A dispensing device uses an elastomeric sealing element between parallel valve faces to ensure fluid tightness without lubricants.

Surgical mechanism establishes a peritoneal reference plane to locate nerve block sites accurately.

Alternating soft and hard thermoplastic sections resolve the contradiction between flexibility and structural support, ensuring accurate device insertion.

A treatment device guide pipe uses a curving portion to redirect fluid flow toward the endoscope insertion portion distal surface.

A medical system aligns slave end effector angles with master instrument inputs via sensor feedback.

Segmented locking mechanisms in a nested sleeve design enable precise spinal implant placement while minimizing soft tissue damage during surgery.

Locking mechanism with ramp members enables secure attachment and easy detachment of surgical trocar assemblies for efficient cleaning.

Angled protective sheath isolates instruments from nasal structures to reduce tissue trauma and maintain clear visualization without frequent irrigation.

Angled shaft with radiopaque crosshairs stabilizes needle orientation during percutaneous nephrolithotomy.

A transparent tubular extractor integrates visualization, aspiration, and ligation ports to remove anatomic structures through a single limited incision.

A laparoscopic port assembly uses pivoting tubular members to insert multiple instruments through one umbilical incision.

A flexible barrier member covers body openings, preventing pathogenic contamination during procedures.

Anti-separation member supply and exhaust holes enable direct gas exchange, removing surgical smoke without tube interference.

An angled integrated soft cannula uses an elastic strip to drive a rigid needle along a non-linear path for subcutaneous insertion.

Extravasation minimization device drains excess fluid through outwardly extending ribs and lumens.

An asymmetric seal system equalizes insertion and extraction drag forces through a diaphragm and annular flange design.

Segmented seal components with asymmetric mating features enable surgeons to customize device geometry without increasing assembly complexity.

A dilator with a tissue protector component spaces gastrocnemius muscles during surgical recession procedures.

An elevated conduit guides the spinal needle along a shaft groove to prevent accidental misplacement during epidural catheter insertion.

A manual rooter rotates elongate medical instruments via a helical ridge mechanism.

Magnetic coupling elements bias a flexible member into an adjustable loop, enabling precise measurement of varying lower esophageal sphincter diameters.

An initialization station calibrates integrated sensors to determine surgical instrument position without external optical tracking.

An elongated light emitter shaft transmits illumination through a window in the surgical access device channel.

A surgical robot mechanism uses a function conversion frame to switch between single-port and multi-port minimally invasive surgery modes.

A trocar system uses an integrated optical channel to visualize tissue layers during insertion.

A medical instrument uses a rotatable inner shaft with openings of varying widths to detach tissue through a window in the outer tube.