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Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_3660_Библиотеки_им_академика_М_И_Перельмана

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226 CAROTID TREATMENT: PRINCIPLES AND TECHNIQUES
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Potts Scissors Opening—Left Carotid Exposure
After cross-clamping, a stab incision is made in the proximal CCA with a No. 11 knife. Suction is used to evacuate all blood from the vessel, and backbleeding should be non-existent. The lumen can then be visualized, and the lower blade of a Potts Scissors is introduced to cut a straight line up along the previously drawn blue line into the ICA.
When the plaque is thick, it is possible to get into a false plane and it becomes critical to ascertain that the lower blade of Potts Scissors is within the vessel lumen at all times. In cases in which this is difcult, the ICA bulldog clamp can be briey released, allowing some backbleeding and demonstrating the ICA lumen.
CHAPTER 4A: SURGICAL TECHNIQUE 227
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228 CAROTID TREATMENT: PRINCIPLES AND TECHNIQUES
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Potts Scissors Opening Vessel— Left Carotid Exposure
A somewhat lower-powered view again demonstrates the Potts Scissors having entered the carotid bulb and coming up the ICA along the midline of the vessel. It is important to avoid any deviation from the midline in the region of the carotid bulb when using the Potts Scissors and instead to go directly up the center, since an incision closer to the crotch of the carotid bulb will render the repair more difcult to achieve in hemostatic fashion.
CHAPTER 4A: SURGICAL TECHNIQUE 229
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230 CAROTID TREATMENT: PRINCIPLES AND TECHNIQUES
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False Plane Demonstrated with Peneld Retractor—Right Carotid Exposure
This gure is an example of a false plane that can develop in the process of opening the ICA lumen. The Peneld No. 4 retractor is situated in the true lumen of the vessel, and it can be seen that the Potts Scissors went through the atheroma of a false plane and eventually burst into the true lumen in the ICA. There are no untoward con­sequences from a false dissection of this type in opening the vessel; however, it should be emphasized that the surgeon must ascertain the true lumen of the ICA either by direct inspection or visualization of backbleeding before any attempt at shunt placement.
CHAPTER 4A: SURGICAL TECHNIQUE 231
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232 CAROTID TREATMENT: PRINCIPLES AND TECHNIQUES
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Focal Plaque in Proximal Internal Carotid Artery—Left Carotid Exposure
A focal tight stenosis at the carotid bulb is shown. There is no extensive plaque either down the CCA or up the ICA, making this a relatively simple and straightforward exposure and plaque removal. However, the brown, discolored area of carotid plaque indicates the presence of intra-plaque hemorrhage and an active plaque that no doubt was responsible for the patient’s symptoms. This is type of soft, friable plaque that is so often associated with intra-plaque hemorrhage.
CHAPTER 4A: SURGICAL TECHNIQUE 233
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234 CAROTID TREATMENT: PRINCIPLES AND TECHNIQUES
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Long, Extensive Common Carotid Artery/Internal Carotid Artery Plaque
Shown is a long atherosclerotic plaque that extends far down the CCA and also a good distance up the ICA. The repair involved a time-consuming, extensive arteriotomy; otherwise the operation was straightforward. I thought it was important in this case to take the CCA arteriotomy low enough for all ulcerated areas of the plaque to be removed.
CHAPTER 4A: SURGICAL TECHNIQUE 235
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