Portable molecular diagnostic device and methods for the detection of target viruses
A method includes coupling a molecular diagnostic test device to a power source. A biological sample is conveyed into a sample preparation module. The device is then actuated by only a single action to cause the device to perform the following functions without further user action. First, the device heats the sample via a heater of the sample preparation module to lyse a portion of the sample. Second, the device conveys the lysed sample to an amplification module and heats the sample within a reaction volume of the amplification module to amplify a nucleic acid thereby producing an output solution containing a target amplicon. The device then reacts, within a detection module, each of (i) the output solution and (ii) a reagent formulated to produce a signal that indicates a presence of the target amplicon within the output solution. A result associated with the signal is then read.
1. An apparatus, comprising:
a housing of a molecular diagnostic device; and
a reagent module disposed within the housing, the reagent module including a reagent housing, a reagent container containing a reagent sealed therein by a frangible seal, a puncturer, and a deformable support member, the reagent housing defining a reagent reservoir into which the reagent is released from the reagent container when the puncturer pierces the frangible seal of the reagent container,
the deformable support member including a sealing portion and a coupling portion, the sealing portion coupled to the reagent housing to fluidically isolate the reagent reservoir, the coupling portion coupled to at least one of the puncturer or the reagent container;
the deformable support member configured to deform from a first configuration to a second configuration in response to an actuation force exerted on the deformable support member, the deformable support member maintaining the puncturer spaced apart from the frangible seal when the deformable support member is in the first configuration, the puncturer piercing the frangible seal when the deformable support member is in the second configuration.
2. The apparatus of claim 1 , wherein the deformable support member is biased towards the first configuration.
3. The apparatus of claim 2 , wherein the deformable support member exerts a biasing force on at least one of the puncturer or the reagent container, the biasing force sufficient to support the at least one of the puncturer or the reagent container in a position to maintain the puncturer spaced apart from the frangible seal.
4. The apparatus of claim 3 , wherein:
the puncturer is coupled within the reagent reservoir;
the reagent container is movably disposed within the reagent reservoir; and
the deformable support member is coupled to the reagent container such that the reagent container moves from a first container position to a second container position within the reagent reservoir when the deformable support member transitions from the first configuration to the second configuration.
5. The apparatus of claim 3 , wherein:
the puncturer is movably disposed within the reagent reservoir; and
the deformable support member is coupled to the puncturer such that the puncturer moves from a first puncturer position to a second puncturer position and into contact with the frangible seal when the deformable support member transitions from the first configuration to the second configuration.
6. The apparatus of claim 1 , further comprising:
a sample preparation module within the housing, the sample preparation module defining a sample input volume that receives a biological sample and an input opening through which the sample input volume can be accessed, the sample preparation module including a heater configured to heat the biological sample to produce an input solution; and
a lid movably coupled to the housing, the lid including a cover portion and a reagent actuator, the lid configured to move relative to the housing between a first lid position and a second lid position, the input opening being exposed when the lid is in the first lid position, the cover portion of the lid covering the input opening when the lid is in the second lid position, the reagent actuator configured to cause the deformable support member to deform from the first configuration to the second configuration when the lid is moved from the first lid position to the second lid position.
7. The apparatus of claim 1 , further comprising:
a detection module within the housing, the detection module including a detection surface configured to capture a target molecule from a biological sample, the detection module in fluid communication with the reagent module such that a signal indicating a presence of the target molecule is produced in response to the reagent being conveyed into the detection module.
8. The apparatus of claim 7 , wherein the reagent is one of a first reagent or a second reagent, the first reagent formulated to be bound to the target molecule in response to the first reagent being conveyed into the detection module, the second reagent formulated to produce the signal when catalyzed by the first reagent.
9. The apparatus of claim 8 , wherein the second reagent is a precipitating substrate formulated to produce an insoluble colored particle when the second reagent is contacted with the first reagent.
10. The apparatus of claim 7 , wherein:
the reagent container is a first reagent container;
the puncturer is a first puncturer;
the reagent is a first reagent, the first reagent being one of a catalyzing reagent formulated to be bound to the target molecule in response to the first reagent being conveyed into the detection module or a precipitating reagent formulated to produce the signal when catalyzed by the catalyzing reagent;
the reagent module includes a second reagent container containing a solution; and
the coupling portion of the deformable support member is coupled to at least one of a second puncturer or the second reagent container, the deformable support member maintaining the second puncturer spaced apart from the second reagent container when the deformable support member is in the first configuration, the second puncturer piercing the second reagent container when the deformable support member is in the second configuration.
11. An apparatus, comprising:
a housing of a molecular diagnostic device; and
a reagent module disposed within the housing, the reagent module including a reagent housing, a reagent container containing a reagent sealed therein, a puncturer, and a deformable support member, the reagent housing defining a reagent reservoir into which the reagent is released from the reagent container when the puncturer pierces a portion of the reagent container,
the deformable support member including a sealing portion and a coupling portion, the sealing portion coupled to the reagent housing to fluidically isolate the reagent reservoir, the coupling portion coupled to at least one of the puncturer or the reagent container,
the deformable support member configured to deform from a first configuration to a second configuration in response to an actuation force exerted on the deformable support member, the deformable support member maintaining the puncturer spaced apart from the portion of the reagent container when the deformable support member is in the first configuration, the puncturer piercing the portion of the reagent container when the deformable support member is in the second configuration; and
a sample preparation module within the housing, the sample preparation module defining a sample input volume that receives a biological sample and an input opening through which the sample input volume can be accessed, the sample preparation module including a heater configured to heat the biological sample to produce an input solution; and
a lid movably coupled to the housing, the lid including a cover portion and a reagent actuator, the lid configured to move relative to the housing between a first lid position and a second lid position, the input opening being exposed when the lid is in the first lid position, the cover portion of the lid covering the input opening when the lid is in the second lid position, the reagent actuator configured to cause the deformable support member to deform from the first configuration to the second configuration when the lid is moved from the first lid position to the second lid position.
12. A molecular diagnostic device, comprising:
a reagent housing including a puncturer and defining a reagent reservoir;
a reagent container containing a reagent sealed therein by a frangible seal, the reagent configured to be released from the reagent container into the reagent reservoir when the puncturer pierces the frangible seal of the reagent container; and
a deformable support member including a sealing portion and a coupling portion, the sealing portion coupled to the reagent housing to fluidically isolate the reagent reservoir, the coupling portion coupled to the reagent container, the deformable support member configured to deform from a first configuration to a second configuration in response to an actuation force exerted on the deformable support member, the deformable support member maintaining the puncturer spaced apart from the frangible seal when the deformable support member is in the first configuration, the puncturer piercing the frangible seal when the deformable support member is in the second configuration.