public function getVitals($patient_id)
 {
     $vitalsModel = new VitalsModel();
     $feedback = $vitalsModel->getVitals($patient_id);
     if (!$feedback) {
         $response = array(P_STATUS => STATUS_ERROR, P_MESSAGE => "No vitals recorded for this user!");
         return $response;
     }
     return $feedback;
 }