Multi-Stroke Auto-Disable Syringe
P. R. Suresh Samuel
More than 80% of therapeutic drugs need reconstitution and a single-stroke auto-disable syringe (ADS) will not work unless two syringes are used. This increases plastic waste by 100%.
There are no metal parts in the Multi-Stroke ADS, and all of the plastics can be recycled. Only one syringe is needed for reconstitution application. Instead of the disabling mechanism triggering when the piston is drawn backward, this design triggers the disable mechanism when the piston moves forward. The triggering mechanism also will work regardless of the dosage.
To operate the syringe, the user twists and removes a protection tab and draws the required drug dosage into the syringe. When the user intends to inject the drug, the riding clip moves forward on the notch in the piston head. Simultaneously, the riding clip opens from the clip seat into the recess on the piston head. This de-links the connectivity from the piston rod. The drug is delivered and the syringe is rendered useless.
Sudden Infant Death Syndrome Monitor
Sudden Infant Death Syndrome (SIDS) is the major cause of death of infants below 18 months of age across the globe. Apnea is identified as the major cause of SIDS. Existing apnea monitors are complex and expensive. Unlike its contemporaries, this apnea monitor differentiates between Central Sleep Apnea (CSA) and Obstructive Sleep Apnea (OSA) solely by the information from respiration movement signals. Amplitude and phase relations of the abdominal and thoracic excursion signals are used for separate detection of CSA and OSA.
In the case of CSA, respiration movements cease or have low amplitudes, which are detected by the monitor. During upper airway obstructions (OSA), the respiration movements try to overwhelm the blockage, and hence, abdominal and thoracic movement signals are out of phase. The two movement signals are separately monitored and OSA is reported when they go out of phase.
Unlike its contemporaries, the monitor uses simple production technologies and is expected to cost as little as $2.00. The equipment holds promise for the developing world, where lowcost solutions are needed for hospitals and nursing homes.