What is the best immediate treatment for a severe pneumothorax?

Azotemia is defined as:

Highly irritating drugs can severely damage blood vessels and surrounding tissue if:

Respiratory stridor is an indication of:

__________, meaning difficult birth, represents the majority of obstetric emergencies.

Diminished or absent breath and heart sounds are most compatible with:

Azotemia is defined as:

Hypertonic saline is contraindicated:

__________, meaning difficult birth, represents the majority of obstetric emergencies.

The AMBU bag is: