Cannulas TRIZ Cases

Nested aspiration cannulas enable rapid bone marrow extraction via a single entry, reducing invasiveness and procedure time.

A dilation introducer enables minimally invasive intervertebral implant insertion through Kambin's triangle using a semi-annular access cannula.

A slotted transparent cannula enables direct visualization during endoscopic procedures.

Segmented compliant membranes dynamically open for tether passage and self-close to prevent insufflation gas leaks during endoscopic procedures.

Curved asymmetrical protection sheet reduces moving resistance for special-shaped instruments while preventing puncture of the funnel-shaped sealing ring.

An inflatable anchor member secures a cannula tip to stabilize an extendable radiofrequency electrode during spinal disc treatment.

Collapsible retractor with inflatable seal prevents gas escape during specimen removal while maintaining minimal orifice distention.

Segmented non-circular sheath design manages intrarenal pressure during ureteroscopy, preventing pyelovenous backflow and sepsis risks.

A surgical instrument guide device uses proximal and distal bendable members to control tool orientation during minimally invasive procedures.

Nested sleeves maintain coaxial alignment during sequential bone dilation, reducing procedural time by eliminating successive instrument changes.

A disposable plastic cannula serves as both a camera bridge and instrument port.

A pre-loaded inverting tractor captures thrombus material within a catheter.

Multi-port access device integrates multiple instrument ports into a single hub for minimally invasive procedures.

Nested elongated members progressively dilate tissue, reducing trauma during minimally invasive portal creation.

A cutting device reduces entrapped tissue size using a hypotube with a sharp edge or cutting wire.

Expandable ribs adjust opening shape to reduce tissue trauma while x-ray transparent components enable real-time pressure monitoring.

An elastic application rod prevents injury by bending under excessive force while maintaining rigidity for effective debridement.

Fluoropolymer cladding prevents evanescent wave coupling to reduce heat buildup and improve illumination.

A flexible portal saver assembly uses an expandable dilating obturator to maintain secure surgical access through small incisions.

Concentric sleeves displace bone tissue to form a cavity without extraction, preserving structural integrity while enabling therapeutic energy application.

Segmented expandable sheaths reduce procedure time and urethral trauma during minimally invasive bladder access.

A collapsible nasal catheter navigates narrow passages and ejects strong fluid jets.

A nasal specimen collection system uses separate irrigation and collection paths to dislodge and recapture samples via fluid flow.