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ARTIFICIAL PANCREAS The “artificial pancreas’’ Matthews used is one of several devices in development that marry a glucose sensor with a computer-guided insulin pump. It automatically monitors blood sugar levels and, when needed, delivers insulin to lower blood sugar. In an advance over some other systems, it can also inject another hormone, glucagon, to raise blood sugar as needed. People with type 1 diabetes make glucagon but do not secrete it properly in response to low blood sugar.

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