04.03.2013 Views

Anesthesia Student Survival Guide.pdf - Index of

Anesthesia Student Survival Guide.pdf - Index of

Anesthesia Student Survival Guide.pdf - Index of

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

346 ● AnesthesiA student survivAl <strong>Guide</strong><br />

amounts <strong>of</strong> blood loss, fluid shifts leading to coagulopathy or anemia, and air<br />

embolism from Trendelenburg positioning. Large bore IV access is needed and<br />

an arterial line or central venous catheter may also be used since urine output<br />

will not reliably reflect intravascular fluid status.<br />

Laparoscopic surgery or robotic assisted surgery is also becoming<br />

increasingly popular because <strong>of</strong> decreased invasiveness. However, retroperitoneal<br />

insufflation has been reported in some studies to be associated with<br />

increased systemic absorption <strong>of</strong> carbon dioxide and decreases in urine output,<br />

leading to iatrogenic excessive fluid repletion.<br />

Radical Cystectomy<br />

Radical cystectomy is indicated in patients with muscle invasive bladder cancer.<br />

Other less common indications include neurogenic bladder, chronic urinary<br />

obstruction, or pelvic malignancy. In men, the bladder, prostate, seminal vesicles,<br />

and urethra is removed. In women, the bladder, urethra, anterior vaginal<br />

wall, uterus, and bilateral ovaries and fallopian tubes are removed. A urinary<br />

diversion, either to the colon or ileum, is created at the end <strong>of</strong> the procedure.<br />

Anesthetic considerations and patient positioning are similar to a radical<br />

prostatectomy. Bowel surgery introduces additional complications, including<br />

longer operative time and increased risk <strong>of</strong> bacteremia. In addition, in cancer<br />

patients, the anesthesiologist must consider effects <strong>of</strong> previously administered<br />

chemotherapeutic agents: doxorubicin has cardiotoxic effects, methotrexate<br />

has hepatic toxicity, cisplatin and methotrexate have neurotoxicity and renal<br />

toxicity.<br />

Nephrectomy: Open or Laparoscopic<br />

Removal <strong>of</strong> the kidney, fascia, adrenal gland and upper ureter, or a radical<br />

nephrectomy, is usually performed for malignancy/neoplasm, transplantation,<br />

cystic disease, or severe calculous disease. In about 5% <strong>of</strong> patients, the tumor<br />

extends into the vena cava, which can result in several complications. If the IVC<br />

is fully or partially occluded, there may be a decrease in venous return. The IVC<br />

may have to be temporarily clamped during resection, potentially requiring<br />

vasopressor support. Rarely, cardiopulmonary bypass may be indicated if there<br />

is extensive IVC infiltration.<br />

The patient is typically positioned in the kidney rest position for the<br />

retroperitoneal approach. This position can cause caval compression and

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!