Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
MOMII KENTA Last modified date:2021.05.25

Assistant Professor / Emergency & Critical Care Center / Kyushu University Hospital

1. Kenta Momii, Satoshi Hamai, Goro Motomura, Kensuke Kubota, Masato Kiyohara, Takuaki Yamamoto, Yasuharu Nakashima, Revascularization of the Necrotic Femoral Head After Traumatic Open Anterior Hip Dislocation in a Child: A Case Report , J Med Case Rep. 2019 Aug 16;13(1):254. , 2019.08, Introduction: Avascular necrosis of the femoral capital epiphysis is the most serious complication after traumatic dislocation of the hip in children. This case report discusses the localization and revascularization of the necrotic femoral head following rarely experienced traumatic open anterior hip dislocation in children.
Case presentation: Our patient was an 11-year-old Japanese boy who had open anterior hip dislocation sustained in a traffic accident. Reduction of the hip joint was performed in an emergency operation, and he was evaluated using serial gadolinium-enhanced magnetic resonance imaging. T1-weighted magnetic resonance images showed two bands with low signal intensity in the femoral capital epiphysis on coronal and oblique axial planes, indicating the existence of avascular osteonecrosis of the femoral head. We observed gadolinium enhancement in the central region of the epiphysis, where the area between the two bands with low signal intensity was located. Serial assessment with enhanced magnetic resonance images during a non-weight-bearing period of 1.5 years after injury showed revascularization starting from the central region and converging toward the peripheral region. Although the patient had leg-length discrepancy due to the early epiphyseal closure, non-weight-bearing treatment for the avascular osteonecrosis of the femoral head achieved a favorable outcome without any hip joint dysfunction, pain, or sign of secondary osteoarthritic change within 4.5 years after injury.
Conclusion: We confirmed the revascularization process of the necrotic lesion in the femoral capital epiphysis in an 11-year-old boy using serial gadolinium-enhanced magnetic resonance imaging. Conservative non-weight-bearing treatment achieved a favorable outcome. .
2. Yuji Shono, Tomohiko Akahoshi, Satomi Mezuki, Kenta Momii, Noriyuki Kaku, Jun Maki, Kentaro Tokuda, Tetsuro Ago, Takanari Kitazono, Yoshihiko Maehara, Clinical Characteristics of Type A Acute Aortic Dissection With CNS Symptom , Am J Emerg Med. 2017 Dec;35(12):1836-1838. , 2017.12, Background and purpose: Accurate diagnosis of acute aortic dissection (AAD) is sometimes difficult because of accompanying central nervous system (CNS) symptoms. The purpose of this study was to investigate the clinical characteristics of Type A AAD (TAAAD) with CNS symptoms.
Methods: We retrospectively reviewed the medical records of 8403 patients ambulanced to our emergency and critical care center between April 2009 and May 2014.
Results: We identified 59 TAAAD patients for the analysis (mean age, 67.3±10.5years; 37 (62.0%) male). Eleven patients (18.6%) presented CNS symptoms at the onset of TAAAD, and these patients complained less frequently of typical chest and back pain than those without CNS symptoms (p<0.0001). Initial systolic and diastolic blood pressure were lower (p=0.003, and p=0.049, respectively) and involvement of the supra-aortic artery was more frequent in patients with CNS symptoms (p<0.0001).
Conclusion: Because CNS symptom can mask chest and back pain caused by TAAAD, physicians should always consider the possibility of TAAAD in patients with CNS symptoms in emergency medicine settings..
3. Hideki Kadota, Kenta Momii, Masuo Hanada, Kenichi Kamizono, Yusuke Inatomi, Kana Hisanaga, Sei Yoshida, Kippei Ogaki, Keijiro Kiyoshima, Simultaneous Deep Inferior Epigastric and Bilateral Anterolateral Thigh Perforator Flap Reconstruction of an Extended Perineoscrotal Defect in Fournier's Gangrene: A Case Report , Microsurgery. 2019 Mar;39(3):263-266. , 2019.03, Fournier's gangrene is lethal necrotizing fasciitis that involves the perineum and external genitalia. We describe the case of a 52-year-old man with Fournier's gangrene who underwent reconstruction of an extensive perineoscrotal defect using three pedicled perforator flaps. Three debridement procedures resulted in a skin and soft tissue defect of 36 × 18 cm involving the perineum, scrotum, groin, medial thigh, buttocks, and circumferential perianal area and left the perforating arteries originating from these locations unavailable for reconstruction. We repaired the defect using left deep inferior epigastric artery perforator (DIEP) (29 × 8 cm) and bilateral anterolateral thigh perforator (ALT) flaps (35 × 8 cm and 22 × 7 cm). The flaps reached the defect without tension, and the defect was successfully covered without a skin graft. No postoperative complications occurred except for epidermal necrosis involving a tiny part of the DIEP flap tip. Nine months postoperatively, the patient experienced no impairment of bowel function or hip joint movement. There was also no avulsion or ulceration of the reconstructed perineal skin, and the cosmetic appearances of the healed wound and donor site were satisfactory. The combination of these three perforator flaps enabled us to achieve a satisfactory outcome while avoiding skin grafts. .
4. Etsuro Nanishi, Yuichirou Hirata, Sooyoung Lee, Noriyuki Kaku, Kenta Momii, Kensuke Kubota, Hisanori Nishio, Yoshihiko Maehara, Toshiro Hara, Polymyxin-B Immobilized Column-Direct Hemoperfusion for Adolescent Toxic Shock Syndrome, Pediatr Int. 2016 Oct;58(10):1051-1054. , 2016.08, Toxic shock syndrome (TSS) is a critical illness associated with toxin from Staphylococcus aureus. Despite recent advances in critical care, mortality remains high and additional effective therapy is required. We report an adolescent case of TSS successfully treated with direct hemoperfusion using polymyxin-B immobilized fiber (PMX-DHP). The patient with spina bifida also had ischial pressure ulcer, and developed TSS associated with methicillin-resistant S. aureus. Despite conventional treatment, the patient developed refractory shock, which was immediately improved with PMX-DHP. PMX-DHP has been widely used for the treatment of sepsis to remove circulating endotoxins produced by Gram-negative bacteria, but beneficial effects have also been reported for Gram-positive bacterial infection. To our knowledge, this is the first report on PMX-DHP for TSS in an adolescent patient, and we propose that PMX-DHP could be a new treatment strategy for severe TSS in children as well..
5. Tomohiko Akahoshi, Mitsuhiro Yasuda, Kenta Momii, Kensuke Kubota, Yuji Shono, Noriyuki Kaku, Kentaro Tokuda, Takashi Nagata, Tomoharu Yoshizumi, Ken Shirabe, Makoto Hashizume, Yoshihiko Maehara, Sarcopenia Is a Predictive Factor for Prolonged Intensive Care Unit Stays in High-Energy Blunt Trauma Patients, Acute Med Surg. 2016 May 2;3(4):326-331., 2016.05, Aim: Sarcopenia has been increasingly reported as a prognostic factor for outcome in settings such as cirrhosis, liver transplantation, and emergent surgery. We aimed to elucidate the significance of sarcopenia in severe blunt trauma patients.
Methods: We retrospectively analyzed 84 patients emergently admitted to the intensive care unit at Kyushu University Hospital (Fukuoka, Japan) from May 2012 to April 2015. We assessed the amount of skeletal muscle present according to computed tomography and its relevance to ventilation-free days, patients' length of stay in the intensive care unit, and 28-day mortality.
Results: Twenty-five (29.7%) patients were defined as sarcopenic. Sixteen (19.7%) patients required 15 days or more in the intensive care unit. The major reason was a prolonged ventilation requirement due to flail chest (n = 7) or pneumonia (n = 3). Sarcopenic patients' stays in intensive care were significantly longer than those of non-sarcopenic patients (18.7 versus 6.4 days, respectively; P < 0.001). Univariate and multivariate analyses showed sarcopenia to be a significant risk factor for prolonged intensive care unit stay.
Conclusion: Sarcopenia is a risk factor that predicts prolonged intensive care unit stay in high-energy blunt trauma patients. .
6. Satomi Mezuki, Yuji Shono, Tomohiko Akahoshi, Kana Hisanaga, Hiroshi Saeki, Yuichiro Nakashima, Kenta Momii, Jun Maki, Kentaro Tokuda, Yoshihiko Maehara, Esophageal Perforation Due to Blunt Chest Trauma: Difficult Diagnosis Because of Coexisting Severe Disturbance of Consciousness, Am J Emerg Med. 2017 Nov;35(11):1790.e3-1790.e5. , 2017.11, Esophageal perforation due to blunt trauma is a rare clinical condition, and the diagnosis is often difficult because patients have few specific symptoms. Delayed diagnosis may result in a fatal clinical course due to mediastinitis and subsequent sepsis. In this article, we describe a 26-year-old man with esophageal perforation due to blunt chest trauma resulting from a motor vehicle accident. Because a severe disturbance of consciousness masked the patient's trauma-induced thoracic symptoms, we required 11h to diagnose the esophageal perforation. Therefore, the patient developed septic shock due to mediastinitis. However, his subsequent clinical course was good because of prompt combined therapy involving surgical repair and medical treatment after the diagnosis. .
7. Nobuaki Tsukamoto, Takao Mae, Akihisa Yamashita, Takahiro Hamada, Tatsuhiko Miura, Takahiro Iguchi, Masami Tokunaga, Toshihiro Onizuka, Kenta Momii, Eiji Sadashima, Yasuharu Nakashima, Refracture of Pediatric Both-Bone Diaphyseal Forearm Fracture Following Intramedullary Fixation With Kirschner Wires Is Likely to Occur in the Presence of Immature Radiographic Healing , Eur J Orthop Surg Traumatol. 2020 May 5. , 2020.05, Purpose: Refracture of pediatric both-bone diaphyseal forearm fractures (PBDFFs) may occur, even if the fractures are treated with intramedullary nailing. The purpose of this study was to investigate the risk of refracture of PBDFFs treated with intramedullary Kirschner wires (K-wires), which are commonly used in our clinic.
Methods: The present multicenter retrospective study included 60 consecutive patients with 60 PBDFFs who were treated with intramedullary K-wires at 5 hospitals between 2007 and 2016. The age of the patients at the time of the primary fracture ranged from 2 to 15 years. The characteristics of the primary fractures and treatment course were evaluated.
Results: Refracture occurred in 6 patients (10.0%). Three of the patients were young girls; the other 3 were adolescent boys. Refractures were caused by falling or during sports activity. The duration from primary fracture to refracture ranged from 46 to 277 days, and in 5 of the 6 patients refractures occurred within 6 months. Although we were unable to identify factors significantly contributing to refracture (e.g. fracture type or treatment procedures), radiographs at the latest visit before refracture demonstrated findings of immature healing in five of six patients. Both K-wires and external immobilization had been removed before complete fracture healing in a large proportion of patients with refracture (80.0%).
Conclusions: Refracture of PBDFF may occur several months after treatment with intramedullary K-wires if the primary fracture shows immature healing. Physicians should pay special attention when judging radiographic fracture healing, even when the fracture is deemed to have clinically healed. .
8. Yukio Akasaki, Hiroshi Sugimori, Kenta Momii, Tomohiko Akahoshi, Suguru Matsuura, Yukihide Iwamoto, Yoshihiko Maehara, Makoto Hashizume, A Simple Predictive Formula for the Blood Requirement in Patients With High-Energy Blunt Injuries Transferred Within One Hour Post-Trauma, Acute Med Surg. 2014 Oct 20;2(2):82-91. , 2014.10, Aims: To recognize patients who require massive transfusion at the early stage of blunt trauma, we retrospectively investigated patients with high-energy blunt injuries transferred within 1 h post-trauma.
Methods: Between August 2007 and July 2011, 233 trauma patients were: (i) injured by a high-energy blunt mechanism with Injury Severity Score ≥9; (ii) not dead on arrival; (iii) older than 9 years; and (iv) at our center within 1 h after injury. The findings for 113 of those patients were analyzed, including those produced by ultrasonography, computed tomography, and arterial blood gas analyses.
Results: Of 113 patients, 33 underwent massive transfusion (≥6 units) within 8 h of arrival. A logistic regression analysis revealed that an arterial lactate level ≥28 mg/dL (P < 0.001; odds ratio, 105.11; 95% confidence interval, 12.58-2,718.84) and a flat ratio of the inferior vena cava on computed tomography ≥3 (P < 0.001; odds ratio, 32.50; 95% confidence interval, 4.44-714.44) were significant independent predictors for a massive transfusion within 8 h. In a receiver operating curve analysis, the area under the curve of the need for massive transfusion was 0.956, with a sensitivity of 0.94 and a specificity of 0.90. A linear predictive formula for the probability (P) of receiving a massive transfusion was generated as P = 2 × lactate (mg/dL) + 15 × the flat ratio of inferior vena cava - 103. Using another 52 trauma patients, the formula was validated.
Conclusions: An elevated level of arterial lactate and the flat ratio of inferior vena cava were significant predictors for identifying the patients who would require a massive transfusion in the early stage after high-energy blunt trauma. .