Related by context. All words. (Click for frequent words.) 65 bowel perforation 64 thrombophlebitis 63 diaphragmatic hernia 63 cardiac tamponade 62 placental abruption 62 pyloric stenosis 62 intestinal obstruction 62 tubal pregnancy 62 diverticulum 62 HELLP syndrome 62 fibroid tumor 61 Intussusception 61 hemangioma 61 pleural effusion 61 arterial blockage 61 vascular malformation 60 pericardial effusions 60 cholecystitis 60 ovarian cyst 60 ventricular septal defect 60 atresia 60 urinary blockage 60 incompetent cervix 60 peritonitis 60 mesenteric ischemia 59 Ebstein anomaly 59 bowel blockage 59 umbilical hernia 59 hemoptysis 59 primary pulmonary hypertension 59 pulmonary emboli 59 Hypotension 59 bowel obstructions 59 aneurisms 59 Pulmonary embolism 59 patent ductus arteriosus 59 bowel resection 59 pseudoaneurysm 59 intestinal perforation 59 Wegener granulomatosis 59 pulmonary stenosis 59 carcinoid tumor 59 Chiari malformation 59 Duodenal 59 uterine bleeding 59 blood clot 58 lipoma 58 hiatus hernia 58 intestinal blockage 58 hydrops 58 distended abdomen 58 atrial septal defect 58 fluid overload 58 strangulated hernia 58 bowel 58 ischemic colitis 58 neurological complications 58 subarachnoid haemorrhage 58 mitral valve regurgitation 58 incisional hernia 58 idiopathic cardiomyopathy 58 ovarian cysts 58 ileus 58 phlebitis 58 colon perforation 58 severe respiratory distress 58 hypersensitivity reaction 58 pericardial effusion 58 lichen planus 58 coarctation 57 vasospasm 57 tricuspid regurgitation 57 malformation 57 diverticula 57 inflamed gallbladder 57 varices 57 acute myocarditis 57 heavy menstrual bleeding 57 intracerebral bleed caused 57 methemoglobinemia 57 congenital diaphragmatic hernia 57 noncancerous tumor 57 cystic lesions 57 brachial plexus palsy 57 Thrombocytopenia 57 gall stones 57 volvulus 57 neurologic symptoms 57 ruptured uterus 57 acute aortic dissection 57 cardiomegaly 57 pulmonary embolus 57 mitral stenosis 57 intestinal bacterial overgrowth 57 pyelonephritis 57 pneumothorax 57 ventricular septal defects 57 acute subdural hematoma 57 interstitial pneumonitis 57 intestinal perforations 57 bowel perforations 57 adrenal insufficiency 57 hyperemesis 57 abdominal hernia 57 aneurysm 57 laparotomy 56 Hirschsprung Disease 56 postoperative complication 56 internal bleeding 56 interrupted aortic arch 56 atrioventricular septal defect 56 primary anastomosis 56 cyst 56 exploratory laparotomy 56 cholestasis 56 infective endocarditis 56 skin abscesses 56 molar pregnancy 56 intraoperative complications 56 bacterial endocarditis 56 gastrointestinal stromal tumor 56 transfusion syndrome 56 parathyroid 56 mitral valve prolapse 56 dermoid cyst 56 dysmotility 56 abscess 56 pleural effusions 56 desmoid tumor 56 Eisenmenger syndrome 56 respiratory distress syndrome 56 pancreatectomy 56 spontaneous pneumothorax 56 enlarged spleen 56 keloid 56 upper gastrointestinal bleeding 56 ruptured aneurysms 56 urethral stricture 56 persistent pulmonary hypertension 56 cysts 56 hypovolemic shock 56 hemophagocytic lymphohistiocytosis 56 necrotizing 56 hiatal hernia 56 patent ductus arteriosus PDA 56 artery blockages 56 dissected aorta 56 total abdominal hysterectomy 56 Meckel diverticulum 56 severe aplastic anemia 56 lymphocytic leukemia 56 ministroke 56 gastroschisis 56 myelomeningocele 55 intestinal obstructions 55 inflamed pancreas 55 orchitis 55 Ileus 55 arachnoiditis 55 rectal prolapse 55 gastric ulcer 55 duodenal ulcer 55 fecal impaction 55 malignant polyp 55 cardiogenic shock 55 ruptured bowel 55 diffuse intrinsic pontine glioma 55 endocarditis 55 severe exacerbations 55 pheochromocytoma 55 meconium 55 vaginal bleeding 55 abnormal heartbeat 55 pulmonary atresia 55 pulmonary embolism 55 truncus arteriosus 55 hypoxemia 55 fibroma 55 hamartoma 55 ectopic pregnancy 55 toxemia 55 neurologic deficits 55 aortic dissection 55 arterial occlusion 55 pre cancerous lesion 55 colectomy 55 aortic regurgitation 55 intracranial bleeding 55 intracerebral 55 hyperkalemia 55 thromboembolic events 55 benign positional vertigo 55 fetal distress 55 Hirschsprung disease 55 abscesses 55 esophagitis 55 thymectomy 55 upper endoscopy 55 seroma 55 generalized tonic clonic seizures 55 reoperations 55 gastric reflux 55 cell carcinoma 55 ganglion cyst 55 appendicitis 55 recanalization 55 gastrointestinal bleed 55 bullous 55 aortic coarctation 55 cyanotic 55 paraganglioma 55 myocarditis 55 necrotizing pancreatitis 55 mastoiditis 55 hemodynamic instability 55 ischemic bowel 55 septal defect 55 lactase deficiency 55 suppurative 54 Pericarditis 54 underwent laparoscopic surgery 54 myectomy 54 epididymitis 54 subdural haemorrhage 54 dermopathy 54 enlarged lymph node 54 achalasia 54 pannus 54 twin transfusion 54 coronary artery dissection 54 uterine tumors 54 diabetes insipidus 54 recurrent infections 54 cancerous polyp 54 intestinal blockages 54 craniectomy 54 Postoperative complications 54 arteriovenous malformation 54 pre cancerous polyps 54 aortic rupture 54 diverticuli 54 inguinal hernia 54 cystic acne 54 cerebral vasospasm 54 posterior urethral valves 54 vaginal yeast infections 54 severe mitral regurgitation 54 osteomyelitis 54 urinary retention 54 cholelithiasis 54 interstitial pneumonia 54 Compartment syndrome 54 Budd Chiari syndrome 54 amniotic fluid embolism 54 tricuspid atresia 54 bladder infection 54 small bowel resection 54 keloid scarring 54 Gall bladder 54 bleedings 54 enlarged tonsils 54 postprocedure 54 abnormal uterine bleeding 54 choriocarcinoma 54 vasovagal syncope 54 bicuspid valve 54 bone marrow biopsy 54 Hashimoto thyroiditis 54 hydrocele 54 unruptured aneurysms 54 microvascular angina 54 Aortic dissection 54 ulcer 54 clot 54 polyposis 54 lesions 54 tamponade 54 gallstone 54 thyrotoxicosis 54 rebleeding 54 bladder dysfunction 54 haematuria 54 paralytic ileus 54 bacteriuria 54 splenectomy 54 postoperative complications 54 Wilm tumor 54 upper airway obstruction 54 malperfusion 54 Lemierre syndrome 54 Tetralogy 54 perforated bowels 54 thoracentesis 54 hypoventilation 54 partial hysterectomy 54 postoperative infections 54 Hypoplastic Left Heart 54 lipomas 54 microvascular disease 54 swollen lymph node 54 laparoscopic fundoplication 54 gastrointestinal symptoms 54 cellulitis 54 canker sores 54 perforated appendix 54 gastrointestinal hemorrhage 54 postsurgical 54 thromboembolism 54 biliary atresia 54 coronary occlusion 54 ruptured appendix 53 thromboses 53 bronchopulmonary dysplasia 53 LVNC 53 post thrombotic syndrome 53 acetaminophen toxicity 53 needle aspiration 53 rhythm disturbances 53 hydronephrosis 53 Vitamin B# deficiency 53 fibrous dysplasia 53 EXJADE 53 intractable epilepsy 53 Cushing syndrome 53 hydatid cyst 53 subependymal giant cell 53 Churg Strauss syndrome 53 gastrostomy 53 hepatectomy 53 osteopetrosis 53 oral thrush 53 chromosomal defect 53 enlarged thyroid gland 53 brain hemorrhages 53 renal colic 53 pulmonary thromboembolism 53 polyhydramnios 53 Postoperative 53 lesion 53 acute phosphate nephropathy 53 stomach ulcer 53 inoperable tumor 53 disc herniation 53 Venous thromboembolism 53 Diverticulosis 53 Von Willebrand disease 53 hyperammonemia 53 ganglion cysts 53 ventricular septal defect VSD 53 lumbar disk herniation 53 ovarian hyperstimulation syndrome OHSS 53 acute colitis 53 thoracic aortic aneurysm 53 intracranial haemorrhage 53 placenta accreta 53 respiratory insufficiency 53 debilitating complication 53 ovarian hyperstimulation syndrome 53 deep vein thromboses 53 lumbar puncture 53 teratoma 53 excisional 53 cortical dysplasia 53 Wilms tumor 53 hypervascular tumors 53 endophthalmitis 53 adrenal tumors 53 leiomyosarcoma 53 Abdominal pain 53 blood clotting disorder 53 ruptured aneurysm 53 cardio myopathy 53 Lyme arthritis 53 hernias 53 extubated 53 delayed gastric emptying 53 cell sarcoma 53 Heavy menstrual bleeding 53 radiculopathy 53 inflamed appendix 53 iritis 53 Joubert syndrome 53 Myocarditis 53 lymphadenopathy 53 esophageal perforation 53 Chiari Malformation 53 reflux 53 receiving XGEVA 53 papillary carcinoma 53 tracheal stenosis 53 erythema nodosum 53 FVIII inhibitors 53 vein thrombosis 53 brain aneurism 53 ectopia cordis 53 thrombocytosis 53 pulmonary artery banding 53 abruption 53 polycystic kidneys 53 osteoid osteoma 53 wound dehiscence 53 abnormal vaginal bleeding 53 neurofibromas 53 invasive fungal infection 53 Ventricular Septal Defect 53 retinal detachment 53 pseudotumor cerebri 53 fibroid 53 enlarged adenoids 53 bedsore 53 left ventricular dysfunction 53 birth defect 53 bronchopneumonia 53 haemorrhages 53 Aneurysms 53 placenta previa 53 Zollinger Ellison syndrome 53 dysplastic lesions 53 bladder exstrophy 53 leiomyomas 53 adhesions 53 idiopathic thrombocytopenic purpura ITP 53 Raynaud phenomenon 53 hepatic failure 53 delayed CINV 53 clubfeet 53 aortic aneurysm 53 gross hematuria 53 Adhesions 53 ectopic pregnancies 53 pneumonectomy 53 benign cyst 53 Pulmonary hypertension 53 nasal polyps 53 postpartum haemorrhage 53 malignant hyperthermia 53 RVOT 53 hemorrhagic pancreatitis 53 gallbladder 53 neuroblastoma tumor 53 pulmonary embolism PE 53 ruptured ectopic pregnancy 53 aortic valve stenosis 53 hemmorhage 53 dilated cardiomyopathy 52 anaphylactoid reactions 52 PPCM 52 thrombi 52 urticaria hives 52 chronic heartburn 52 nodular melanoma 52 pulmonary hemorrhage 52 postoperative infection 52 arteriogram 52 Aortic valve 52 airway blockage 52 mitral valve replacement 52 eosinophilic 52 S. aureus sepsis 52 grand mal seizure 52 varicella infection 52 stenoses 52 Septicaemia 52 fulminant hepatitis 52 pancreatitis 52 corticosteroid therapy 52 excruciating headaches 52 barium swallow 52 syncopal episode 52 compartment syndrome 52 coagulopathy 52 tracheostomy tube 52 intracranial hypertension 52 twisted bowel 52 hepatitis B reactivation 52 disc protrusion 52 corneal edema 52 biliary obstruction 52 benign paroxysmal positional vertigo 52 underactive thyroid gland 52 syncopal episodes 52 Torsades de Pointes 52 Ectopia Cordis 52 sonographically guided 52 connective tissue disorder 52 gastro oesophageal reflux disease 52 angiosarcoma 52 limb deformities 52 tract infections 52 ovarian tumor 52 uncontrolled bleeding 52 renal failure 52 perforated appendicitis 52 Henoch purpura 52 valvular disease 52 anaphylactic reaction 52 basilar artery 52 bacterial overgrowth 52 pleurodesis 52 acute abdominal pain 52 nerve entrapment 52 thyroiditis 52 deep venous thromboses 52 aortic artery 52 Varicose veins 52 fibroadenoma 52 bronchospasm 52 dysphagia 52 potassium deficiency 52 heparin induced thrombocytopenia 52 Morquio syndrome 52 disk herniation 52 kidney dysfunction 52 aortic stenosis 52 Idiopathic 52 yeast infection 52 thyroidectomy 52 congenital disorder 52 thunderclap headache 52 myelopathy 52 intracerebral hemorrhage 52 laryngospasm 52 vesicoureteral reflux 52 dialysis catheter 52 toxic megacolon 52 emergency caesarian section 52 uremia 52 ICD shocks 52 decompensation 52 peritoneal cancer 52 ADPKD 52 emergency caesarean section 52 Hernias 52 gastric pouch 52 adenoid 52 infantile hemangiomas 52 Morton neuroma 52 TIA transient ischemic 52 postpartum hemorrhage 52 abdominal abscess 52 hypoplasia 52 incontinence impotence 52 basal cell cancers 52 cryptogenic 52 gastrointestinal reflux 52 gastrointestinal obstruction 52 epidural abscess 52 streptococcus infection 52 cerebral edema 52 angioedema 52 brain malformation 52 Hypertrophic 52 intussusception 52 congenital anomaly 52 Gastroparesis 52 cholangitis 52 uterine perforation 52 colic diarrhea 52 morphine overdose 52 QTc prolongation 52 fibroids 52 meniscal tear 52 aortic stenosis narrowing 52 ulcerations 52 Scheuermann kyphosis 52 epigastric pain 52 Goldenhar syndrome 52 chronic sinusitis 52 upper gastrointestinal endoscopy 52 pruritic 52 uterus didelphys 52 hernia 52 glioblastoma brain tumor 52 dysmenorrhoea 52 fibromatosis 52 proximal DVT 52 intracranial aneurysms 52 hematuria 52 extubation 52 profuse watery diarrhea 52 congenital malformation 52 syncopal 52 ptosis 52 esophageal reflux 52 ascites 52 gallstones 52 tricuspid valve 52 aortic dissections 52 endometrial hyperplasia 52 perioperative complications 52 dysrhythmia 52 congenital abnormalities 52 hyperkeratosis 52 metabolic acidosis 52 intra abdominal abscess 52 Hemolytic Uremic Syndrome 52 uterine fibroid tumors 52 femoral fracture 52 metastatic adenocarcinoma 52 postoperative bleeding 52 bronchogenic 52 recurrent DVT 52 postoperative delirium 52 perforated intestine 52 constrictive pericarditis 52 enterocolitis 52 Langerhans cell histiocytosis 52 PR interval prolongation 52 aspiration pneumonia 52 neonate 52 liposarcoma 52 Nissen fundoplication 52 Toxicities 52 Hemolytic Uremic Syndrome HUS 52 mucocutaneous reactions 51 hypoglycemic coma 51 intestinal pseudo 51 intestine 51 edema swelling 51 placenta praevia 51 benign nodules 51 thromboembolic complications 51 cancerous prostate gland 51 tension pneumothorax 51 gangrene infection 51 polidocanol 51 chronic sinus infections 51 abscessed tooth 51 hemodynamically unstable 51 chronic metabolic acidosis 51 silent ischemia 51 diverticulosis 51 dissecting aortic aneurysm 51 thrombotic complications 51 subdural hematomas 51 aspirate 51 pacemaker implantation 51 cranial bleeding 51 post operatively 51 variceal 51 aneurysms 51 intraoperative bleeding 51 Arteriovenous 51 angina chest 51 mycotic 51 nerve palsy 51 polymyalgia 51 stent implantation 51 rotator cuff tear 51 retinal haemorrhages 51 lung biopsy 51 digoxin toxicity 51 vasovagal 51 pyometra 51 hyperhydrosis 51 transesophageal echocardiography 51 Charcot foot 51 Rhabdomyolysis 51 GERD gastroesophageal reflux disease 51 Long QT syndrome 51 neuroleptic malignant syndrome 51 coronary blockages 51 anastomotic leak 51 anal incontinence 51 post partum haemorrhage 51 necrotising 51 mitral regurgitation 51 Raynaud disease 51 calculi 51 fecal incontinence 51 transient ischemic attacks 51 spinal epidural 51 congenital kidney 51 intestinal polyps 51 pulmonary haemorrhage 51 infarctions 51 artery stenosis 51 intestinal inflammation 51 cerebral aneurysm 51 Fluid retention 51 chorioamnionitis 51 femur fracture 51 GISTs 51 aplasia 51 cancerous growths 51 adrenalectomy 51 aortic insufficiency 51 papules 51 Urinary tract infections 51 catheterization procedure 51 aortic annulus 51 nimodipine 51 needle puncture 51 aortic aneurism 51 varicoceles 51 hemolytic anemia 51 pneumonitis 51 untreated urinary tract 51 acute urinary retention 51 paracentesis 51 abdominal incision 51 idiopathic dilated cardiomyopathy 51 Arteriovenous Malformation 51 Sclerosing 51 subdural hematoma blood clot 51 pulmonary hypertension 51 diaper dermatitis 51 generalized seizures 51 bacterial prostatitis 51 cystic 51 leukoencephalopathy 51 acute peritonitis 51 benign prostatic hypertrophy 51 aneurism 51 vascular abnormality 51 polyps growths 51 strep infections 51 Nasal polyps 51 benign polyps 51 Moyamoya 51 autoimmune hemolytic anemia 51 necrotizing enterocolitis 51 Oesophageal 51 Acute pancreatitis 51 coronary artery 51 carotid artery blockage 51 parathyroid glands 51 ruptured aortic aneurysm 51 hematological toxicities 51 urinary tract infection 51 acute pyelonephritis 51 variable immunodeficiency 51 Acute respiratory distress 51 atherosclerotic lesions 51 heart murmur 51 Hurthle cell 51 torsade de pointes 51 myelogenous leukemia 51 idiopathic scoliosis 51 abdominal hernias 51 dysplasia 51 pontine glioma 51 congenital hydrocephalus 51 Canker sores 51 adrenal masses 51 recurrent atrial fibrillation 51 Fibroid tumors 51 hydatid disease 51 benign lesion 51 ximelagatran 51 uterine myoma 51 excruciating abdominal pain 51 ventral hernias 51 arteriovenous malformations 51 abdominal tenderness 51 hypopigmentation 51 nephrosis 51 astrocytoma 51 sonographically 51 polycystic 51 airway obstruction 51 convulsive seizures 51 intractable hiccups 51 recurrent UTI 51 Cysts 51 temporal lobectomy 51 vasculitis 51 ARVD 51 hormonal disorder 51 Crouzon Syndrome 51 noncancerous growths 51 nasal stuffiness 51 Fallopian tube 51 aneurysm rupture 51 aneurysmal subarachnoid hemorrhage 51 bone marrow suppression 51 esophageal atresia 51 peritoneal mesothelioma 51 stenosis 51 neurocardiogenic syncope 51 Hyperthyroidism 51 parathyroid gland 51 hepatic toxicity 51 petit mal seizures 51 cough wheezing 51 lymphatic malformation 51 removed laparoscopically 51 hypophosphatemia 51 Bloodstream infections 51 nodular lesions 51 keloids 51 colic 51 primary immunodeficiency PI 51 splenic rupture 51 Ulcerative colitis 51 osteosarcoma bone 51 venous reflux 51 lymphoblastic leukemia 51 malabsorption 51 omphalocele 51 precancerous lesion 51 Infusion Reactions Severe 51 sonographic findings 51 prolapsed uterus 51 neurologic complications 51 valvular heart disease 51 untreated celiac disease 51 biliary tree 51 reactive airway 51 arrhythmogenic right 51 embolisation 51 pseudomembranous colitis 51 osteoma 51 endoscopic retrograde cholangiopancreatography ERCGrant Parpan 51 Uterine fibroids 51 Acute sinusitis 51 Angioedema 51 pancytopenia 51 cerebral thrombosis 51 related bloodstream infections 51 osteochondromas 51 pulmonary embolisms 51 metastatic lung cancer 51 sclerosing 51 acute psychosis 51 carotid stenosis 51 diagnostic laparoscopy 51 suprapubic 51 PTLD 51 tracheitis 51 polyneuropathy 51 hemorrhagic strokes 51 perioperatively 51 cerebral angiography 51 thyroid deficiency 51 Atrial Septal Defect 51 ruptured brain aneurysm 51 empyema 51 bleed uncontrollably 51 hypoplastic 51 granuloma 51 myocardial infarction ventricular fibrillation 51 Zenker diverticulum 51 mental retardation blindness 51 percutaneous drainage 51 primary sclerosing cholangitis 51 impingement syndrome 51 fat embolism 51 supraventricular tachycardia 51 hypertrophic cardiomyopathy HCM 51 Publicist Zsa Zsa Gabor 51 Digoxin toxicity 51 adder bite 51 purpura 51 paroxysmal supraventricular tachycardia 51 adenoma 51 goiter 51 inhaled nitric oxide 51 parathyroidectomy 51 Cellulitis 51 vitreous hemorrhage 50 severe hypersensitivity reactions 50 renal artery stenosis 50 abnormality 50 multisystem organ failure 50 colon resection 50 arrythmia 50 myomas 50 postoperative pulmonary 50 pre cancerous growths 50 Urge incontinence 50 sympathectomy 50 shoulder dystocia 50 Moyamoya disease 50 reflux symptoms 50 Asymptomatic 50 postpartum bleeding 50 epiglottitis 50 fibrocystic 50 Compartment Syndrome 50 lumbar disc herniation 50 pulmonary valve 50 liver biopsy 50 Fibrous Dysplasia 50 gastroduodenal 50 infarcts 50 colon polyp 50 interstitial nephritis 50 renal failure interstitial lung 50 parathyroid carcinoma 50 hyperalgesia 50 testicular tumors 50 thromboembolic 50 tumor 50 angina pectoris 50 undergo catheterization 50 blocked fallopian tubes 50 varicosities 50 thymic carcinoma 50 interstitial pulmonary fibrosis 50 inflamation 50 Guillain Barré Syndrome 50 gastrectomy 50 priapism 50 Tardive dyskinesia 50 myotomy 50 Crohns disease 50 cancerous polyps 50 cancerous nodules 50 prostate cancer metastases 50 seborrheic keratoses 50 abdominal cramping 50 subdural hematoma 50 underdeveloped lungs 50 precancerous condition 50 hip dysplasia 50 ecchymosis 50 diabetic ulcer 50 venous malformation 50 electrolyte abnormalities 50 Pancreatitis 50 bulbar polio 50 renal insufficiency 50 airway constriction 50 Necrotizing fasciitis 50 embolus 50 noncancerous tumors 50 Bacterial conjunctivitis 50 torticollis 50 Nodules 50 meniscus tear 50 coughing spasms 50 balloon valvuloplasty 50 optic neuritis 50 retroperitoneal 50 von Willebrand disease 50 obliterative bronchiolitis 50 tissue necrosis 50 occlusive disease 50 precancerous polyp 50 bowel incontinence 50 gastrointestinal perforation 50 PCNSL 50 coronary artery bypass grafts 50 abdominal abscesses 50 dermatologic reactions 50 bicuspid aortic valve 50 catheterized 50 wife Gail Gygax 50 paresis 50 IUGR 50 thoracic aortic aneurysms 50 necrotizing fasciitis 50 necrotizing pneumonia 50 portal vein thrombosis 50 recurrent miscarriages 50 corneal ulcer 50 pneumonia septicemia 50 atrioventricular block 50 heterotaxy 50 CABG coronary artery 50 endoscopy procedure 50 polyp 50 nonalcoholic cirrhosis 50 hypertrophic obstructive cardiomyopathy 50 anoxic brain injury 50 pericardial mesothelioma 50 inferior vena cava 50 tardive dyskinesia TD 50 hypocalcemia 50 severe allergic reaction 50 retinal hemorrhage 50 adnexal mass 50 sinus node dysfunction 50 polyps 50 liver resection 50 menorrhagia 50 ischemic cardiomyopathy 50 hypocalcaemia 50 reflux disease GERD 50 nonmalignant tumor 50 oesophageal 50 distended stomach 50 physiological abnormalities 50 tonic clonic seizure 50 endometritis 50 Ketoacidosis 50 allergic reaction 50 eosinophilia 50 MALT lymphoma 50 autoimmune hepatitis 50 lung lesions 50 eclampsia 50 Dysplasia 50 epistaxis 50 spontaneous remission 50 Regurgitation 50 lactic acidosis 50 gastric distention