TY - CHAP M1 - Book, Section TI - Mask Squeeze A1 - Zafren, Ken A1 - Thurman, R. Jason A1 - Jones, Ian D. A2 - Knoop, Kevin J. A2 - Stack, Lawrence B. A2 - Storrow, Alan B. A2 - Thurman, R. Jason Y1 - 2021 N1 - T2 - The Atlas of Emergency Medicine, 5e AB - Mask squeeze results when a diver fails to maintain the balance between the air pressure within the mask and the external water pressure during descent. If a diver descends without equalizing pressure by exhaling through the nose, significant negative air pressure will exist inside the mask. The net result may include rupture of capillary beds, leading to conjunctival hemorrhage and skin ecchymosis. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/03/28 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181051053 ER -