High Flow Volume Nasal Irrigation Device and Method for Alternating Pulsatile and Continuous Fluid Flow

A high flow volume nasal irrigation device, comprising:

• a) a squeeze bottle configured to elastically deform in response to a manually applied pressure from a user's thumb and fingers and thus pressurize the liquid therein, the squeeze bottle comprising an open end and an interior;
• b) a segmented dip tube having a free end extending into the squeeze bottle, the free end comprising an inside diameter and an inlet structure configured to generate a predetermined pressure drop in a fluid flow in the tube and to prevent the free end from collapsing;
• c) an elastic segment at the free end configured to oscillate about a bending in response to a differential pressure between an internal pressure and the applied pressure, the segment comprising a pulsatile portion which closes and reopens at the bending to generate a pulsatile fluid flow with a period corresponding to the elastic segment oscillation;
• and
• d) a removable cap disposed on the squeeze bottle open end, the cap comprising an orifice and a bore coaxial with the orifice, the bore configured to receive the dip tube second end and match the orifice with the inside diameter of the dip tube.

A method of ejecting a high flow volume nasal irrigation rinse by squeezing a deformable bottle containing a fluid and thereby urging the fluid into a dip tube free end in the bottle and through a segmented dip tube and out a bottle cap orifice placed adjacent at least one of a user's nostrils, comprising:

• a) oscillating an elastic segment of the dip tube free end about a bending of the segment by squeezing the bottle to apply a differential pressure between an internal pressure and the squeeze pressure on the dip tube;
• b) closing and reopening a pulsatile portion of the dip tube at the bending in the elastic segment in response to the differential pressure and an elastic restoring force in opposition to the bending;
• and
• c) providing a pulsatile fluid flow through the bottle cap orifice and into the user's nostril, the pulsatile flow in response to the oscillating segment and the closing and reopening of the pulsatile portion, a pulsatile period and the segment oscillation corresponding with a pressure threshold constant.