What surgical approach is laparoscopy?
A minimally invasive approach.
How is laparoscopic access initially established?
A Veress needle is inserted through a subumbilical incision.
What gas insufflates the peritoneal cavity during laparoscopic access?
Carbon dioxide.
What does carbon dioxide insufflation raise inside the abdomen?
Intra-abdominal pressure.
What does carbon dioxide insufflation increase in the blood?
Carbon dioxide.
What cardiovascular effects can pneumoperitoneum cause?
It decreases venous return and cardiac output, increases systemic vascular resistance, and can cause lower-limb venous stasis.
How does pneumoperitoneum affect diaphragmatic excursion?
It reduces excursion, especially posteriorly.
How does pneumoperitoneum affect insufflation pressures and carbon dioxide levels?
It raises both.
What respiratory complications can pneumoperitoneum cause in the head-down position?
Shunt, anterior dead-space effect, and secondary endobronchial intubation.
Which postoperative benefits can laparoscopy provide?
Less pain, less restrictive respiratory syndrome, earlier ambulation, less ileus, smaller scars, and a shorter hospital stay.
What complications or drawbacks can laparoscopic surgery involve?
Perforation, poor visualization, conversion to laparotomy, a long learning period, longer procedures, and exclusion of regional anesthesia.
Which contraindications should preoperative assessment identify?
A multiply operated abdomen, acute glaucoma, intracranial hypertension, heart failure, and respiratory insufficiency.
What surgical risk should preoperative assessment discuss with the surgeon?
The risk of conversion.
Which anesthetic technique is used in the anesthetic plan?
General anesthesia with mechanical ventilation and orotracheal intubation.
Which monitoring methods are included in the anesthetic plan?
Pulse oximetry, cardioscopy, capnography and capnometry, spirometry, and auscultation.
Which patients require specified noninvasive or invasive blood pressure monitoring?
Patients at risk, including ASA 3 patients.
Before insufflation, what tidal volume and respiratory rate are recommended?
A tidal volume of 8 ml/kg and a respiratory rate of 14/min.
Before insufflation, what inspiratory-to-expiratory ratio and oxygenation target are recommended?
An inspiratory-to-expiratory ratio of 1:2 and SpO₂ above 94%.
Before insufflation, what end-tidal CO₂ and peak airway pressure targets are recommended?
End-tidal CO₂ of 30 mmHg and peak airway pressure below 30 cmH₂O.
What cardiovascular effects can insufflation cause, and what systolic pressure variation is targeted?
Bradycardia and hypotension; systolic blood pressure variation below 30% of the preoperative value.
How should pneumothorax be managed during surgery?
Diagnose clinically, stop surgery, exsufflate the pneumoperitoneum, drain the chest with or without needle decompression, and convert to laparotomy if required.
In which year was the first laparoscopic cholecystectomy performed?
1987.
At what intra-abdominal pressure are pneumoperitoneum’s hemodynamic effects minimal?
Below 12 mmHg.
What urinary effect can pneumoperitoneum cause?
Transient oliguria.
How does pneumoperitoneum affect mesenteric arterial flow?
It decreases in proportion to intra-abdominal pressure.
How can pneumoperitoneum raise intracranial pressure?
Through carbon dioxide-related cerebral vasodilation, reduced cerebral venous return, and patient positioning.
Which patients may potentially benefit from laparoscopic surgery?
Patients with stable coronary disease, obesity, stable respiratory insufficiency depending on carbon dioxide levels, or pregnancy through the second trimester.
Which conditions or states are listed as risks for laparoscopic surgery?
Emphysema, severe restrictive syndrome, arteritis, intracranial hypertension, shock, unstable or impaired cardiac function depending on ejection fraction, and ventriculoperitoneal shunt.
What type of surgery is laparoscopic cholecystectomy by abdominal location?
Upper-abdominal surgery above the transverse mesocolon.
How long does laparoscopic cholecystectomy last?
About 1 hour 30 minutes.
How severe is intraoperative pain during laparoscopic cholecystectomy?
Moderate.
Which postoperative symptoms are frequent after laparoscopic cholecystectomy?
Nausea and vomiting.
How does the course characterize anesthetic drug choice?
It is nonspecific.
What does the course state about nitrous oxide contraindication?
There is no argument for contraindicating nitrous oxide.
Which three measures are recommended before insufflation?
Nasogastric tube placement, vascular preloading, and strict supine positioning.
What checks and positioning are recommended after insufflation?
Check peak inspiratory pressure below 12 mmHg, re-auscultate for secondary endobronchial intubation, and use marked head-up positioning.
How is dynamic hyperinflation managed in patients with COPD?
Favor expiration with respiratory rate below 12/min, tidal volume 7 ml/kg, inspiratory-to-expiratory ratio greater than 1:2.5, external PEEP, and tolerance of hypercapnia.
Answer 13 questions on Anesthesia for Digestive Laparoscopy.
1. How is laparoscopic access to the peritoneal cavity established?
2. Which broad change has been associated with the minimally invasive laparoscopic approach?
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