Cuffed Inner Cannula and Flexible Outer Cannula Trachesotomy Device: Ensuring a Stable Airway

A modified outer cannula can help thoracentesis after pleural biopsy.

A Dilatable Bronchial Cannula

The cannula is adapted for use in the bronchial tree of the anesthetized dog. Introduced through the mouth or a trach-eotomy opening, the distal end is made to dilate and secure airtight fixation in the bronchus. Positive security and selectivity of the attachment, as well as simplicity of management, recommend the instrument.

Design of an Autoclavable Active Cannula Deployment Device

Concentric tube continuum devices, known as active cannulas, consist of multiple pre-curved elastic tubes that extend telescopically and rotate axially with respect to each other. Through these degrees of freedom, an active cannula presents a dexterous and versatile “tentacle-like” mechanism for accessing targets in minimally invasive surgery. Deploying an active cannula in a practical surgical...

A Flexible Inner-Outer Preconditioned GMRES Algorithm

We present a variant of the GMRES algorithm which allows changes in the precon-ditioning at every step. There are many possible applications of the new algorithm some of which are brieey discussed. In particular, a result of the exibility of the new variant is that any iterative method can be used as a preconditioner. For example, the standard GMRES algorithm itself can be used as a preconditio...

Ultrasound-guided cannula cricothyroidotomy.

1128 November 2012 W HEN difficulty with airway management is anticipated, standard guidelines recommend that the airway is secured in the awake patient.1 In the “cannot intubate, cannot ventilate” situation, surgical or cannula cricothyroidotomy is required.1 However, identification of the cricothyroid membrane by palpation is frequently inaccurate, even under elective conditions.2 Preoperativ...