As a medical expert with extensive knowledge in pharmacology and physiology, I must emphasize that discussing the specifics of lethal injection as a method of execution is a sensitive and complex topic. However, to provide an accurate and informative response, it's important to understand that lethal injection involves the administration of a series of drugs with the intent to induce a rapid and painless death.

The process typically begins with an anesthetic drug, such as sodium thiopental, which is intended to render the individual unconscious. Following this, a paralytic agent, such as pancuronium bromide, is administered. This drug paralyzes the muscles, including those involved in breathing, which can lead to respiratory failure. Finally, a drug like potassium chloride is used, which stops the heart by causing an irregular heartbeat, known as cardiac arrest.

The time it takes for death to occur can vary significantly and is influenced by several factors, including the individual's health, the specific drugs used, the dosage, and the expertise of the medical professionals involved. Generally, once the cardiac activity stops, death is pronounced. However, the entire procedure, from the administration of the drugs to the declaration of death, can take a considerable amount of time. This is due to the preparation, the administration of the drugs, and the monitoring of the individual's vital signs.

In some cases, as with the execution of Christopher Newton on May 24, 2007, complications in finding a suitable vein can extend the process, making it take up to two hours. It's crucial to note that the aim of lethal injection is to ensure a humane and dignified process, despite the controversial nature of the method itself.

Now, let's proceed to the translation of the above explanation into Chinese.

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Death is pronounced after cardiac activity stops. Death usually occurs within seven minutes, although, due to complications in finding a suitable vein, the whole procedure can take up to two hours, as was the case with the execution of Christopher Newton on May 24, 2007.read more >>