Sample-retainable biosensor test strip

A biosensor test strip comprising:

• a base plate;
• a first electrode electrically connected with a first working electrode formed on said base plate;
• a second electrode electrically connected with a second working electrode and formed on said base plate, said second working electrode formed as a closed loop and circumferentially surrounding said first working electrode to define a reaction pool within said closed loop of said second working electrode, having a biological reagent provided in said reaction pool to be in contact with said first working electrode and said second working electrode;
• an insulating layer inserted in between said first electrode and said second working electrode;
• and
• a cover plate superimposed on said base plate to cover all said electrodes and said base plate to form a biosensor test strip and having means formed in the test strip for venting air outwardly;
• whereby upon feeding of liquid sample as supplied from a user or patient into said reaction pool through a feeding port formed on an edge portion of said cover plate, said liquid sample will be reacted with said reagent to produce a signal, across said first and said second working electrodes within said reaction pool, and said signal will be converted to a readable data to be displayed on a measurement apparatus or meter.