Michael Ho

ECG Changes with Hypo-/Hyperkalemia

Fluids, Electrolytes, Nutrition

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Fluids, Electrolytes, Nutrition

ECG Changes with Hypo-/Hyperkalemia

Audio   The resting membrane potential (RMP) of myocytes is determined by the Na+/K+-ATPase, which pumps 3 Na+ out for every 2K+ pumped and an open potassium channel that allows K to move outside the cell, down its concentration gradient. Both these...

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Michael HoAug 23No Comments

Anesthetic Management of Carcinoid Syndrome

Endocrine

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Endocrine

Anesthetic Management of Carcinoid Syndrome

Carcinoid tumors are slow growing neuroendocrine cells that usually originate from primitive stem cells in the GI tract (67%), usually in the small intestine, rectum/appendix, and stomach, but may also be found in the lung, pancreas, and, rarely, gonads....

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Michael HoAug 14No Comments

Meconium Aspiration Syndrome

Pediatrics

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Pediatrics

Meconium Aspiration Syndrome

Meconium aspiration syndrome (MAS) is defined as respiratory distress in a newborn infant born through meconium-stained fluid whose symptoms cannot otherwise be explained. MAS occurs in approximately 2-10% of infants born through meconium-stained fluid....

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Michael HoAug 111 Comment

Tourniquet Use in Sickle Cell Anemia

Hematology

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Hematology

Tourniquet Use in Sickle Cell Anemia

The use of a tourniquet in orthopedic surgery or other procedures provides the benefits of producing a bloodless field, reducing blood loss, and decreasing time of surgery. At the same time, prolonged tourniquet use can cause hemostasis, acidosis, and...

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Michael HoAug 10No Comments

Update on the Perioperative Surgical Home

Professional Issues

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Professional Issues

Update on the Perioperative Surgical Home

There is a sharp debate on whether the Perioperative Surgical Home (PSH) should represent the future of our profession. It has been estimated that two-thirds of all hospital costs are directly related to surgical care. In US, this amounts to approximately...

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Michael HoAug 09No Comments

Perioperative CSF Drains

Neuromuscular

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Neuromuscular

Perioperative CSF Drains

Historically, the incidence of paraplegia following thoracic aortic aneurysm (TAA) surgery was on the order of 40%, although more recent estimates are below 20% for open TAA surgery and 8% for thoracic endovascular aneurysm repair (TEVAR). Possible mechanisms...

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Michael HoAug 21No Comments

Electroconvulsive Therapy: Contraindications

Neuromuscular

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Neuromuscular

Electroconvulsive Therapy: Contraindications

Due to the physiologic changes associated with ECT, the list of contraindications includes recent MI, heart failure, recent stroke, elevated ICP, aneurysm/AVM at risk of rupture, pheochromocytoma, severe HTN, and cervical spine instability, most of which...

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Michael HoAug 17No Comments