At Wolfson Medical Center in Holon, there were three times the number of patients on Friday morning than the week before.
"I came to strengthen and encourage the staff, and I came out encouraged myself," he said.
The device has been in use since March at the Rambam Medical Center in Haifa.
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Lama was diagnosed with a heart defect that results in abnormal blood flow between two of the major arteries connected to the heart, a condition which requires medical intervention.
The Israeli NGO has treated children from 59 countries, including more than 2,500 Palestinian patients.