System for gravity inclusion of powder into a medical delivery flow stream

An apparatus for delivering dry hemostatic powder to an internal operation site or wound site of mammals comprising:

• a hand-holdable device having a handle end and a forward end;
• the handle end of the hand-holdable device having a coupling element configured to connect to a gas pressure source and a distal end of the hand-hold-able device having a delivery connector configured to connect to an elongated tubular delivery channel;
• an open passageway comprising an internal gas flow path between the coupling element and the distal end of the hand-holdable device;
• the internal gas flow path intersecting with and connecting to a receptor for a neutral pressure particulate dry hemostatic powder gravity feeding cartridge;
• and
• a trigger within the handle end of the hand-holdable device which opens and closes an opening for hemostatic gravity feed from the cartridge while there is gas flow from the handle end towards the coupling elements and the distal end of the hand-holdable device.

A method of delivering dry hemostatic powder to an internal operation site or wound site of mammals, comprising the steps of:

• (a) extending a distal end of an elongated tubular delivery channel to a position that an emitting opening of said delivery channel is adjacent to said internal operation site or wound site;
• (b) providing a hand-held application device comprising a handle end and a forward end connected to a proximal end of the elongated tubular delivery channel, generating a conveying gas flow containing pressurized gas to mix with dry powder, a receptor for a neutral pressure particulate dry hemostatic powder gravity feeding cartridge, and an internal gas flow path from the handle end to the proximal end and passing under the receptor;
• (c) engaging the neutral pressure particulate dry hemostatic powder gravity feeding cartridge onto the receptor;
• (d) providing a gas conveying tube connected to the flow path at the handle end of the hand-held application device;
• (e) providing gas under pressure to the gas conveying tube to increase gas pressure and cause gas flow through the internal gas flow path and under the receptor;
• (f) gravity dropping the dry hemostatic powder from a bottom of the cartridge into the internal gas flow path through the receptor;
• (g) carrying the dropped dry hemostatic powder in the internal gas flow into the proximal end of the elongated tubular delivery channel;
• and
• (h) delivering the dropped dry hemostatic powder carried in the internal gas flow path to the internal operation site or wound site to assist clotting of blood at the operation site or wound site through the elongated tubular delivery channel, wherein the dropped dry hemostatic powder is dropped into the internal gas flow while gas pressure above the dry hemostatic powder in the cartridge is lower than gas pressure within the internal gas flow path, and wherein the gas pressure in the cartridge is reduced by delivering the dropped dry hemostatic powder into the internal gas flow path, the dropped dry hemostatic powder creating an increased pressure differential between gas pressure above the dry hemostatic powder in the cartridge and gas pressure within the internal gas flow path, and intermittently gas in the internal gas flow path with form a bolus of gas and flow up through the dry hemostatic powder in a bottom section of the cartridge to reduce the pressure differential between the gas pressure above the dry hemostatic powder in the cartridge and the gas pressure within the internal gas flow path, without creating a new gas pressure differential between the gas pressure above the dry hemostatic powder in the cartridge and the gas pressure within the internal gas flow path where the gas pressure in the cartridge never exceeds the gas pressure in the internal gas flow path.