Once a vein is detected at a suitable depth, the device alerts the operator, who pushes the syringe needle into the patient's flesh and injects the medicine.

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Kwiatkowski flushed the syringe and needle down the toilet, according to the employee.

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This is done using a needle and syringe under a general anaesthetic in a hospital.

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Insulin is commonly given by a needle and syringe and is injected just under the skin.

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