Skip to Main Content

++

A 67-year-old woman presents to the emergency department (ED) by ambulance with a 3-hour history of increasing dyspnea associated with chest pain. She has a history of coronary artery disease, hypertension, and hyperlipidemia, but no known allergies. Her medications include atenolol, low-dose aspirin, atorvastatin, acetaminophen with codeine, and nitroglycerin spray as needed. Prior to notifying the emergency medical services, the patient had used three sprays of nitroglycerin every 5 to 10 minutes with no relief.

++

She is placed on 10 L·min−1 oxygen by face mask and is transported to the hospital. Upon arrival at the ED, her vital signs are heart rate (HR) 113 beats per minute (bpm) and irregular, respiration rate (RR) 31 breaths per minute, blood pressure 85/45 mm Hg, and SaO2 86%. On examination, she appears to be in severe respiratory distress and is unable to speak more than three to four words in one breath. She is morbidly obese with an estimated weight of over 137 kg (300 lb) and is 151 cm (5 ft) tall with a body mass index (BMI) of 60 kg·m−2. Chest auscultation reveals faint breath sounds with crackles over the entire lung fields, a significant decrease in air entry in both bases combined with mild wheezing. Other findings include 1+ bilateral ankle edema, S4 heart sound, and a grade III/VI systolic murmur radiating to the axilla. Her jugular venous pressures (JVP) cannot be assessed because of her marked obesity and short neck. Her electrocardiogram reveals a pattern consistent with an acute antero-lateral myocardial infarction. The chest x-ray shows poor inflation and is also consistent with pulmonary edema.

++

Following the initial assessment, it is noticed that the SaO2 decreases to 81% and her respirations increase to 35 to 40 breaths per minute. Pink froth appears from her mouth.

++

As you prepare for airway intervention, she loses consciousness. The monitor shows pulseless ventricular tachycardia. What do you do to secure the airway at this time?

++

18.2.1 Define Obesity

++

Obesity is the presence of an excess of body fat when compared to average values for age and gender. When the percentage of body fat exceeds 15% to 18% in men, or 20% to 25% in women, the individual is considered obese. Unfortunately, measuring body fat is not practical as it requires sophisticated techniques.

++

The ideal body weight (IBW) has been used frequently in clinical settings to define obesity:

++

IBW (kg) = height (cm) - x

++

where x is 100 for males and 105 for females.

++

Patients who weigh 20% above IBW are considered overweight, and they are considered morbidly obese if their weight is 200% above the calculated IBW.1

++

The World Health Organization (WHO) has utilized body mass index (BMI) as the international method of classifying obesity.2 It has become the standard ...

Want remote access to your institution's subscription?

Sign in to your MyAccess profile while you are actively authenticated on this site via your institution (you will be able to verify this by looking at the top right corner of the screen - if you see your institution's name, you are authenticated). Once logged in to your MyAccess profile, you will be able to access your institution's subscription for 90 days from any location. You must be logged in while authenticated at least once every 90 days to maintain this remote access.

Ok

About MyAccess

If your institution subscribes to this resource, and you don't have a MyAccess profile, please contact your library's reference desk for information on how to gain access to this resource from off-campus.

Subscription Options

AccessAnesthesiology Full Site: One-Year Subscription

Connect to the full suite of AccessAnesthesiology content and resources including procedural videos, interactive self-assessment, real-life cases, 20+ textbooks, and more

$995 USD
Buy Now

Pay Per View: Timed Access to all of AccessAnesthesiology

24 Hour Subscription $34.95

Buy Now

48 Hour Subscription $54.95

Buy Now

Pop-up div Successfully Displayed

This div only appears when the trigger link is hovered over. Otherwise it is hidden from view.