This suggests that the dreamer needs to "clear" the head, to get rid of pressure, as when sinus pressure makes it difficult to think "clearly."
Drainage Basin: The Area of Land Drained By A River.
If by sinus cavities you mean the confluences of the sinuses, then Yes
Functional Endoscopic Sinus SurgeryFunctional Endoscopic Sinus Surgery
well the definition of the word Lavage means to "wash out an organ" so lavage of the maxillary sinus mean to wash out the maxillary sinus.
Excedrine Sinus Headache
Sinus infection.
A drainage pattern characterized by parallel main streams and secondary tributaries intersected at right angles by tributaries. Also known as espalier drainage; grapevine drainage.
A drainage pattern characterized by parallel main streams and secondary tributaries intersected at right angles by tributaries. Also known as espalier drainage; grapevine drainage.
Regular Sinus Rhythym
Sinus rhythm .
normal sinus rhythm