Intracavitary applicators for radiation oncology

An intracavitary applicator for radiation oncology, comprising:

• a first arm, including
• a first handle defining a proximal end of the first arm, and
• a first tandem defining a distal end of the first arm, the first tandem configured to be inserted in a uterine cavity of an individual, wherein the first handle and the first tandem collectively define a first internal channel with an open proximal end and a closed distal end, the first internal channel configured to receive and guide a radiation source from the proximal end of the first arm toward the distal end of the first arm;
• a second arm, including
• a second handle defining a proximal end of the second arm, and
• a second tandem defining a distal end of the second arm, the second tandem configured to be inserted in the uterine cavity of the individual, wherein the second handle and the second tandem collectively define a second internal channel with an open proximal end and a closed distal end, the second internal channel configured to receive and guide the radiation source from the proximal end of the second arm toward the distal end of the second arm;
• and
• a coupler coupling the first arm and the second arm, the coupler including at least one of
• a guide including a first internal channel in which the first arm is slidably received and a second internal channel in which the second arm is slidably received, and
• a locking device configured to be selectively manipulated to hold the first arm and the second arm in a fixed position;
• wherein the first tandem and the second tandem each include a first curved portion and a second curved portion, and wherein the second curved portion of the first tandem and the second curved portion of the second tandem curve along a common plane in opposite directions when the first curved portion of the first tandem and the first curved portion of the second tandem are oriented to curve in the same direction along parallel planes.