Tubular dry powder drug containment systems, associated inhalers and methods
Pharmaceutical dry powder containers adapted for use in an inhaler and associated inhalers and kits thereof include at least a pair of cooperating generally tubular members, including an inner member and a generally tubular outer member sized and configured to slidably receive the inner member. In operation, at least one of the inner or outer members slide relative to the other to release a pharmaceutical dry powder.
1. An inhaler, comprising:
a body having an inspiratory airflow path and an elongate chamber configured to receive a generally tubular unitized drug containment system;
a generally tubular unitized drug containment system residing in the elongate chamber, the generally tubular unitized drug containment system having a generally open downstream end portion and at least one sealed drug compartment holding dry powder residing upstream of the downstream end portion, wherein the generally tubular drug containment system comprises cooperating, abutting inner and outer generally tubular members that slide to open the sealed drug compartment to thereby release dry powder from the drug compartment without piercing for inhalation;
a display and a user input operatively associated with the display held by the body; and
an electronic counter held by the body in communication with the display, the counter configured to decrement a dose amount needed after a sub-bolus dose is delivered so that a user can readily ascertain which additional unitized drug containment system to select.
2. An inhaler according to claim 1 , wherein the generally tubular container comprises electronically readable dose indicia.
3. An inhaler according to claim 1 , wherein the inner and outer generally tubular members define a drug flow channel, and wherein each of the inner and outer tubular members comprise a generally open downstream end portion.
4. An inhaler according to claim 1 , wherein the inhaler chamber comprises an entry port that is configured to slidably receive the generally tubular drug containment system therein.
5. An inhaler according to claim 1 , wherein the user input comprises positive and negative user inputs to allow a user to enter an increase and/or a decrease of a dose amount desired.
6. An inhaler according to claim 1 , further comprising a vibrator operatively associated with the elongate chamber configured to vibrate dry powder in the inspiratory airflow path during operation.
7. An inhaler according to claim 1 , further comprising an electronic reader in communication with the display and counter, the electronic reader configured to automatically read a dose amount associated with the unitized generally tubular drug containment system in the chamber so that the inhaler can automatically decrement a bolus amount remaining.
8. An inhaler according to claim 1 , wherein inhaler is configured to releaseably hold a plurality of user selectable generally tubular drug containment systems for storage.
9. An inhaler according to claim 1 , wherein the chamber is configured to receive the generally tubular drug containment system in a selected orientation to locate a drug compartment in the generally tubular drug containment system in target top or bottom location in the chamber.
10. An inhaler according to claim 9 , wherein the chamber comprises a projection, and an outer surface of the tubular drug containment system comprises an axially extending slot that matably engages the projection to maintain the desired orientation of the tubular drug containment system in the chamber.
11. An inhaler according to claim 9 , wherein the chamber is configured to matably engage the drug containment system so that the drug compartment is proximate a bottom portion of the air flow path with the inner member window aligned thereabove.
12. An inhaler according to claim 9 , wherein the chamber is configured to matably engage the drug containment system so that the drug compartment is proximate a top portion of the air flow path with the inner member window aligned therebelow.