Because there was bleeding in the lungs they placed the chest tube in an area that was "pertaining to the space between the ribs". What is this region called

Anurse on a medical unit is administering heparin by continuous iv infusion to a client who has a pulmonary embolism. the client’s most recent aptt is 70 seconds. which of the following actions should the nurse take? a. increase the iv infusion rate. b. decrease the iv infusion rate. c. discontinue the iv infusion. d. continue the iv infusion.