Abstract: Disclosed herein is an obturator and/or cannula configured for insertion of a trocar assembly into a surgical cavity and allowing insertion of medical instruments into the surgical cavity through the cannula after removal of the obturator. The cannula can include an obturator for use in a trocar assembly. A trocar assembly is disclosed including a cannula having a shaft, optionally with a lumen, and one or more elements protruding outwardly from a surface of the lumen and an obturator. The obturator can comprise a shaft with one or more portions configured to accommodate the one or more elements protruding from the lumen surface when the obturator shaft is located in the lumen of the cannula.

Abstract: Disclosed herein is a cannula and/or medical instrument accessory configured for providing localized insufflation or venting of gases with respect to a surgical cavity of a patient (such as the pneumoperitoneum) and allowing insertion of medical instruments into the surgical cavity through the cannula. A medical instrument accessory such as a cannula and/or medical instrument accessory can be used for localizing insufflation or venting of gas or fluid near operating end of a medical instrument. The medical instrument accessory can comprise a body mountable over at least a portion of a medical instrument shaft, the body having an inner lumen, proximal end and distal end, the distal end comprising an opening, wherein the distal end is arranged in use at or adjacent an operating end of the medical instrument.

Abstract: Systems and methods for pressure sensors being located in various components of a surgical medical gases delivery system (such as for laparoscopic surgery) are disclosed. The pressure sensors can enable gas supply (either of a surgical medical gases delivery system or supplementary to such a system) to sense pressure so as to safely insufflate the surgical cavity in a controlled manner. Advanced pressure sensing can also be provided to achieve specific flow algorithms and/or non-standard flow patterns that may help achieve functionality for mitigating smoke accumulation in the surgical cavity and/or impairment to vision, and helping to improve stability in the surgical cavity. The pressure sensing disclosed herein can allow for more control over the fundamental aspects of gas control and supply in the surgical gas delivery system, better performance, and outcomes of the surgery, and better incorporation of a humidification therapy.

Abstract: Insufflation systems may provide a continuous flow of insufflation gas to a body cavity. The continuous flow may be directed over the lens of an endoscope received within a cannula to form a protective envelope around the lens and improve visibility. The continuous flow may be supplied by a pressurized gas source. The continuous flow line may be assembled in parallel to an insufflation line running through a standard insufflator configured to provide non-continuous gas flow to the body cavity. The lines may converge upstream of or at the cannula or the insufflation flow may be provided to a separate cannula. Continuous gas flow may be provided by recirculating gas from the body cavity through the cannula Continuous gas flow may be provided by storing gas from the non-continuous insufflation flow in an accumulator and releasing the gas during off phases of the insufflation flow.

Abstract: A surgical cannula for providing insufflation gases to a surgical cavity of a patient (for example, the pneumoperitoneum) and allowing insertion of medical instruments into the surgical cavity through the cannula can include a heater within or coupled to the cannula. The heater can heat the gases and/or the instruments to raise the temperature of the gases and/or instruments above a dew point of the gases to prevent fogging. The heater can also help to defog a lens of a medical instrument by heating to clear the lens and improve optical clarity.

Abstract: A surgical cannula for providing insufflation gases to a surgical cavity of a patient (such as the pneumoperitoneum), allowing insertion of medical instruments into the surgical cavity through the cannula, and venting gases from the surgical cavity to the outside environment can include venting features including filters to more safely reduce the amount of undesirable materials such as smoke from reaching the outside environment.

Abstract: Various venting attachments or leak devices can be removably or permanently coupled to a surgical cannula to allow a user to vent gases, in particular smoke, from a surgical cavity. The venting attachment can be configured to vent the smoke at a predetermined rate and filter out the smoke prior to venting to atmosphere. The substantially constant venting flow rate can promote clearing of the smoke in the surgical cavity while helping to maintain a substantially constant pressure, and thus stability, in the surgical cavity.

Abstract: Disclosed herein is a surgical cannula configured as an instrument retaining or centering apparatus, configured for providing insufflation gases to a surgical cavity of a patient (such as the pneumoperitoneum) and allowing insertion of medical instruments into the surgical cavity through the cannula. The cannula can include features to direct gas flow in particular directions to prevent or reduce smoke, fog/condensation, or other unwanted media from contacting a portion of a medical instrument.