A medical worker at Dorot Medical Centre in Netanya illustrates the use of an EarlySense wireless hospital bed monitor, which from beneath a mattress can detect a patient's heart and respiratory rate and movement, May 12, 2014. EarlySense is evaluating a possible initial public offering in 2015 after already raising $46 million, Chief Executive Avner Halperin said. REUTERS/Finbarr O'Reilly (ISRAEL - Tags: HEALTH SCIENCE TECHNOLOGY)