Paralytic shellfish poisoning (PSP), 1058 Parapharyngeal infections clinical recognition, 1325 discharge/admission, clinical indications, 1326 evidences, 1325 initial assessment, 1326 management/diagnostic testing, 1326 treatment goals, 1325 triage considerations, 1325 –1326 Paraphimosis, 1334 –1335 , 1335 f Paraurethral cysts, 1339 Parenchymal injury, 894 Parental presences, in ED, 18 Parenteral rehydration, 150 –151 , 151 f Paresis, 893 Parinaud syndrome, 312 , 907 Parkland formula, 1099 , 1100 t Paronychia, 1342 –1343 , 1343 f Parotitis, 1349 –1350 , 1349 f Paroxysmal torticollis of infancy, 159 Partial albinism, 465 Partial distal urethral obstruction, 529 –530 Partial intestinal obstruction, chronic, 1303 Partial rebreathing masks, 49 Partial-thickness burns, 1096 –1097 Parvovirus, 411 Pasteurella multocida , 1349 Patellar dislocations, 276 , 1201 Patellar fractures, 1201 Patellar ligament, 275 Patellar tendonitis, 279 Patellofemoral dysfunction (PFD), 279 Patellofemoral pain syndrome, 279 , 1373 clinical recognition, 1373 evidences, 1373 initial assessment/H&P, 1373 management/diagnostic testing, 1373