Cardiac Arrest Upon Induction of General Anesthesia.

There are numerous causes of cardiac arrest in the perioperative period, including hypoxia, hypovolemia, and vagal response to medications or procedures during routine anesthetics. Initiation of adequate cardiopulmonary resuscitation, administration of epinephrine, and application of a defibrillator, with shocking when applicable, are all essential steps in achieving return of spontaneous circulation. Knowledge and utilization of monitoring equipment can alert the provider to problems leading to cardiac arrest as well as ensure proper resuscitative efforts during the event. Polypharmacy is quite common with many of today's special needs patients. It is important to understand the medications they are taking as well as the potential interactions that may occur with drugs given during sedation and general anesthesia. The following is a case report of cardiac arrest including asystole and pulseless electrical activity in a 27-year-old man with autism and behavioral problems who presented for restorative dentistry under general anesthesia in the ambulatory surgery setting.

Medical Management of Epiglottitis.

Epiglottitis is most commonly caused by bacterial infection resulting in inflammation and edema of the epiglottis and neighboring supraglottic structures. Acute infection was once found predominantly in children ages 2 to 6 years old, but with the introduction of the Haemophilus influenzae B (HiB) vaccine the incidence of cases in adults is increasing. Typical clinical presentation of epiglottitis includes fever and sore throat. Evidence of impending airway obstruction may be demonstrated by muffled voice, drooling, tripod position, and stridor. Radiographs can be helpful in diagnosing epiglottitis; however, they should not supersede or postpone securing the airway. An airway specialist such as an otolaryngologist, anesthesiologist, or intensivist should ideally evaluate the patient immediately to give ample time for preparing to secure the airway if necessary. All patients with epiglottitis should be admitted to the intensive care unit for close monitoring.

Ludwig's Angina: Anesthetic Management.

Ludwig's angina (LA) is a gangrenous cellulitis of the neck that spreads via continuity of the fascial planes. Treatment of LA includes aggressive antibiotic therapy as well as surgical drainage in many cases. The most common cause of infection is odontogenic and can be due to both aerobic and anaerobic bacteria. Signs and symptoms of LA include bilateral cervical swelling, dysphagia, drooling, neck tenderness, elevation and posterior distension of the tongue, restricted neck movement, trismus, dyspnea, and stridor, which can result in difficult airway management. Proper preoperative assessment of patients with LA should include identifying features that may cause difficulties with mask ventilation, direct laryngoscopy, and intubation. Alternative methods of ventilation should be considered and immediately accessible, including a plan on how and when they would be used in the event that a patient cannot be mask ventilated or intubated. Marking external anatomical airway landmarks prior to manipulating the airway can save vital time if an emergent airway becomes necessary.

Malignant Hyperthermia: A Case Study in the Dental Ambulatory Surgery Setting.

Historically, patients who developed malignant hyperthermia had an extremely high rate of mortality. Today, if treated appropriately, patients who experience an episode of malignant hyperthermia will most likely survive. This dramatic decrease in mortality associated with malignant hyperthermia is due to several factors, including an increased understanding of the disease, improved diagnostic and monitoring equipment, and the development of lifesaving pharmacologic agents. This article presents the very likely case of acute malignant hyperthermia in a 24-year-old man with special needs, who presented for restorative dentistry under general anesthesia in the outpatient clinic of The Ohio State University's College of Dentistry.