Small Animal Laparoscopy and Thoracoscopy. Группа авторов

Figure 4.33 (A). Application of a wound retractor. With the flexible ring positioned inside the body cavity, ventral tension is applied, and the stiffer ring is “rolled” in a dorsal direction, thus rolling the softer material and shortening the length of the retractor. (B). With shortening of the retractor, 360° outward retraction force is applied to the edges of the incision.

Figure 4.34 A laparoscopic cap makes a wound retractor to a laparoscopic system enabling maintenance of the capnoperitoneum between laparoscopic‐assisted procedures.

      Source: Photo courtesy Dr. Boel Fransson, Washington State University.

Figure 4.35 A morcellator.

      Source: © 2014 Photo courtesy of KARL STORZ SE & CO, KG.

All videos cited in this chapter can be found on the book's companion website at www.wiley.com/go/fransson/laparoscopy.

References

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5 Energy Devices and Stapling Equipment

       Sarah Marvel and Eric Monnet

      Key Points

       A basic understanding of electrosurgical devices is required to allow for appropriate use and prevention of morbidity relating to their use.

       Three different types of coupling injuries can occur with monopolar devices: direct, indirect, and capacitive coupling.

       Indirect coupling results from defects in the insulating coating of the electrode (instrument), often leads to large current densities concentrated in small areas, and can result in high‐morbidity injuries.

       Tissue fusion technology or vessel sealant devices measure tissue impedance and deliver the appropriate amount of energy to achieve a safe seal. They are approved for sealing vessels up to 7 mm in diameter.