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Xun Sun, Zonghao Tang, Meng Pan, Zhengchao Wang, Hongqin Yang, Haiqing Liu
The hemostatic performance of chitosan was greatly improved by blending it with kaolin to fabricate porous composite microspheres (CSMS-K) through inverse emulsion method combining with thermally induced phase separation. The CSMS-K had high amount of interior and surface pores. The synergetic hemostatic competence of chitosan and kaolin components made the hemostatic efficacy of CSMS-K superior to chitosan porous microspheres (CSMS). The hemostatic time of CSMS-K3 in the rat tail amputation and liver laceration models was down to respective 120 and 99s from 183 and 134s of CSMS, and the blood loss of CSMS-K3 was respectively 65% and 36% of that of CSMS in the rat tail amputation and liver laceration models...
December 1, 2017: Carbohydrate Polymers
G Carles, C Dabiri, A Mchirgui, E O Saoudi, N Hcini, K Pouget, B Seve, B de Matteis
Postpartum hemorrhage is a major cause of maternal death worldwide. Many therapeutic strategies have been developed to reduce maternal morbidity and mortality like oxytocin, prostaglandin, and uterine balloons. A new member of the therapeutic arsenal has recently emerged, the chitosan (Celox® ), used since several years by military doctors to stop bleeding of combat wounds. In 2012, a first study was reported with the successful use of chitosan-coated gauze to treat severe postpartum hemorrhage. We report here four cases of the use of chitosan to treat life-threatening obstetric bleeding...
November 2017: Journal of Gynecology Obstetrics and Human Reproduction
Sara Pourshahrestani, Ehsan Zeimaran, Nahrizul Adib Kadri, Nicola Gargiulo, Hassan Mahmood Jindal, Sangeetha Vasudevaraj Naveen, Shamala Devi Sekaran, Tunku Kamarul, Mark R Towler
Chitosan-based hemostats are promising candidates for immediate hemorrhage control. However, they have some disadvantages and require further improvement to achieve the desired hemostatic efficiency. Here, a series of 1% Ga2O3-containing mesoporous bioactive glass-chitosan composite scaffolds (Ga-MBG/CHT) were constructed by the lyophilization process and the effect of various concentrations of Ga-MBG (10, 30, and 50 wt %) on the hemostatic function of the CHT scaffold was assessed as compared to that of Celox Rapid gauze (CXR), a current commercially available chitosan-coated hemostatic gauze...
September 20, 2017: ACS Applied Materials & Interfaces
Jonathan Bar, Alexa David, Tarek Khader, Mary Mulcare, Christopher Tedeschi
Introduction The use of direct oral anticoagulants (DOACs) such as rivaroxaban (Xarelto) is increasingly common. However, therapies for reversing anticoagulation in the event of hemorrhage are limited. This study investigates the ability of hemostatic agents to improve the coagulation of rivaroxaban-anticoagulated blood, as measured by rotational thromboelastometry (ROTEM). Hypothesis/Problem If a chitosan-based hemostatic agent (Celox), which works independently of the clotting cascade, is applied to rivaroxaban-anticoagulated blood, it should improve coagulation by decreasing clotting time (CT), decreasing clot formation time (CFT), and increasing maximum clot firmness (MCF)...
October 2017: Prehospital and Disaster Medicine
P Sobiech, Z Adamiak, P Holak, P Jastrzębski, J Rogowski, M Brzeziński, K Bury, M Jałyński, W Baumgartner
The aim of this study was to evaluate the suitability of thromboelastometry for the analysis of blood test results in goats after the use of hemostatic dressings to control massive bleeding. The study was carried out on 12 goats, 6 animals in each of two subgroups. In all experimental animals incision of the femoral artery was performed, and bleeding was controlled with QuikClot gauze in the first group and Celox gauze in the second group. Dressings were applied for 60 minutes. Blood samples for thromboelastometry were collected from the jugular vein before the incision and 60 min after the application of a dressing...
March 28, 2017: Polish Journal of Veterinary Sciences
I Otrocka-Domagała, P Jastrzębski, Z Adamiak, K Paździor-Czapula, M Gesek, M Mikiewicz, T Rotkiewicz
The purpose of this study was to examine the safety of the long-term application of QuikClot Combat Gauze, ChitoGauze PRO and Celox Gauze using a swine model. The study was conducted on nine pigs weighing approximately 30 kg, which were randomly divided into three groups. Under deep anesthesia, the pigs underwent complete transverse cutting of the femoral artery in the groin region. Hemostatic dressings were left in the wound for 24 hours. The animals were euthanized 24 hours after dressing application. In each group, macroscopic and microscopic severe changes and shock symptoms were observed in the lungs, liver, kidneys and heart...
2016: Polish Journal of Veterinary Sciences
Leslie W Chan, Chae Hwa Kim, Xu Wang, Suzie H Pun, Nathan J White, Tae Hee Kim
UNLABELLED: Positively-charged chitosan gauzes stop bleeding from wounds by electrostatically interacting with negatively-charged cell membranes of erythrocytes to cause erythrocyte agglutination and by sealing wounds through tissue adhesion. In the following work, nonwoven chitosan gauze was impregnated with PolySTAT, a synthetic polymer that enhances coagulation by cross-linking fibrin, to generate PolySTAT/chitosan gauzes with improved hemostatic efficacy. When comparing nonwoven chitosan and PolySTAT/chitosan to a commercially-available chitosan-containing gauze (Celox® Rapid), no appreciable differences were observed in fiber size, morphology, and pore size...
February 2016: Acta Biomaterialia
Sean P Conley, Lanny F Littlejohn, Jose Henao, Sara S DeVito, Gregory J Zarow
OBJECTIVE: Uncontrolled hemorrhage from junctional wounds that cannot be controlled by traditional tourniquets accounts for one in five preventable battlefield exsanguination deaths. Products for treating these wounds are costly and require special training. However, chemically treated gauze products are inexpensive, potentially effective, and require only minimal training. This study was designed to assess the efficacy of three hemostatic gauze products following brief training, using a consensus swine groin injury model...
November 2015: Military Medicine
Mehmet Ozgur Yucel, Haci Polat, Murat Bagcioglu, Tolga Karakan, Can Benlioglu, Ali Cift, Alper Gok, Hesna Muzeyyen Astarci, Turgay Akgul, Cankon Germiyanoglu
PURPOSE: The major complications of partial nephrectomy are bleeding and urine leakage. While various hemostatic agents are used to control bleeding, the histopathological characteristics of these hemostatic agents have not been investigated adequately. We aimed to investigate and compare the histopathological and hemostatic effects of local hemostatic agents in a partial nephrectomy rat model. METHODS: Thirty-two rats were divided into four equal groups, and partial nephrectomy was done to all rats...
January 2016: International Urology and Nephrology
Serkan Abacıoğlu, Kemal Aydın, Fatih Büyükcam, Ural Kaya, Bahattin Işık, Muhammed Evvah Karakılıç
OBJECTIVE: In the first assessment of trauma patients with major vascular injuries, we need effective and rapid-acting homeostatic materials. In this study we compare the efficiencies of Ankaferd Blood Stopper® and a chitosan linear polymer (Celox®) in an experimental rat model with femoral artery bleeding. MATERIALS AND METHODS: Thirty male Wistar albino rats weighing 200-250 g were divided into 3 groups: control, Ankaferd, and chitosan. The femoral artery and vein were visualized and bleeding was started by an incision...
March 5, 2016: Turkish Journal of Haematology: Official Journal of Turkish Society of Haematology
Hamid Reza Hatamabadi, Fatemeh Asayesh Zarchi, Hamid Kariman, Ali Arhami Dolatabadi, Ali Tabatabaey, Afshin Amini
BACKGROUND: Uncontrolled hemorrhage is a well-recognized cause of mortality in trauma victims and the control of active hemorrhage is among the initial steps in resuscitation. OBJECTIVES: The purpose of this study was to assess the role of a hemostatic agent "celox" in the management of civilian stab-wound trauma. PATIENTS AND METHODS: In this clinical trial study, 160 patients with penetrating limb trauma were randomly allocated to either the control or intervention group (n = 80, each group)...
February 2015: Trauma Monthly
Yin-Juan Zhang, Bo Gao, Xi-Wen Liu
Uncontrolled hemorrhage has been considered as one of the most important factors for causing death on the battlefront. If given timely and efficient hemostatic medicines in pre-hospital setting, patients will obtain more time and chance to wait for medical treatment so as to save their lives. However, there is not a certain answer about which kind of hemostatic drugs can achieve efficacious effect to hemostasis in the battle. This review aims to summarize effective hemostatic medicines applied in battlefield from 41 articles...
2015: International Journal of Clinical and Experimental Medicine
P Jastrzębski, Z Adamiak, A Pomianowski, W Krystkiewicz, P Holak, S Sawicki, P Przyborowska, Y Zhalniarovich, G Gudzbeler
The objective of this study was to determine the response of hemostatic dressings. Coagulation and fibrinolytic systems, red blood cell parameters, platelet and leukocyte counts were evaluated after the application of hemostatic dressings: QuikClot, Chitoauze and Celox gauze. The experiment was performed on ten pigs.
2014: Polish Journal of Veterinary Sciences
Brad L Bennett, Lanny F Littlejohn, Bijan S Kheirabadi, Frank K Butler, Russ S Kotwal, Michael A Dubick, Jeffrey A Bailey
Hemorrhage remains the leading cause of combat death and a major cause of death from potentially survivable injuries. Great strides have been made in controlling extremity hemorrhage with tourniquets, but not all injuries are amenable to tourniquet application. Topical hemostatic agents and dressings have also contributed to success in controlling extremity and compressible junctional hemorrhage, and their efficacy continues to increase as enhanced products are developed. Since the addition of Combat Gauze™ (Z-Medica Corporation, Wallingford, CT, USA; http://www...
2014: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
Z Adamiak, P Jastrzebski, A Pomianowski, I Otrocka-Domagała, P Holak, Y Zhalniarovich, P Przyborowska, J Głodek
The effectiveness of three types of hemostatic dressings, QuikClot Gauze, ChitoGauze PRO and Celox Gauze, was evaluated in nine pigs. The results indicated a strong influence of all examined dressings on porcine femoral muscle tissue evaluated 24 hours after direct contact. A histopathological analysis revealed pathological changes in muscle tissue specimens collected from all the animals.
2014: Polish Journal of Veterinary Sciences
Mingkun Huang, Cuiping Ma, Rangcai Yu, Lanling Mu, Jia Hou, Yunyi Yu, Yanping Fan
Methyl jasmonate (MeJA) is one of most abundant scent compounds in Cymbidium ensifolium flowers. In this study, the emission of MeJA and its regulation mechanism were investigated. Our results showed that emission of MeJA in C. ensifolium flowers was controlled developmentally and rhythmically. It occurred in a tissue-specific manner, and high MeJA emission was found in sepals and petals. A group of vital genes involved in the MeJA biosynthesis via the octadecanoid pathway were isolated from C. ensifolium flowers, including CeLOX, CeAOS, CeAOC and CeJMT...
April 2015: Physiologia Plantarum
Brad L Bennett, Lanny Littlejohn
This review analyzes the new (2008-2013) hemostatic agents and dressings for enhanced efficacy in preclinical studies, and investigates supportive findings among case reports of effectiveness and safety in hospital and prehospital literature. A literature search was conducted using PubMed, National Library of Medicine using key words and phrases. The search revealed a total of 16 articles that fit the criteria established for third-generation hemostatic dressings. There were a total of 9 preclinical, 5 clinical, and 2 prehospital studies evaluated...
May 2014: Military Medicine
I M Samokhvalov, K P Golovko, V A Reva, A V Zhabin, A V Denisov, M V Sokhranov, M V Kaznacheev, A B Iudin, P G Alisov
Ongoing intra-abdominal bleeding is the main life-threatening sequence of blunt abdominal trauma. The use of local hemostatic agents allows achieving fast and reliable hemorrhage control in case of parenchymatous organs injury. We investigated the efficacy of a dressing "Celox Gauze" in an experimental model of grade IV liver injury in large animals in the setting of coagulopathy. We used the following experimental model: 30-35% of blood volume was withdrawn followed by severe liver injury and hemostatic agent application...
November 2013: Voenno-medit︠s︡inskiĭ Zhurnal
R Crunkhorn, R Burnham, G Walton
BACKGROUND: Major haemorrhage is a catastrophic complication occurring in 3-4 per cent of head and neck cancer patients. Massive haemorrhage also causes 50 per cent of preventable deaths in combat situations. There has been a surge of interest in the development of effective haemostatic products in the military, with chitosan being one such product. CASE REPORT: A 48-year-old lady presented with a life-threatening head and neck bleed. She was known to have a malignant peripheral nerve sheath sarcoma originating from the left parapharyngeal space...
October 2013: Journal of Laryngology and Otology
Jason M Rall, Jennifer M Cox, Adam G Songer, Ramon F Cestero, James D Ross
BACKGROUND: Uncontrolled hemorrhage is the leading cause of preventable death on the battlefield. The development, testing, and application of novel hemostatic dressings may lead to a reduction of prehospital mortality through enhanced point-of-injury hemostatic control. This study aimed to determine the efficacy of currently available hemostatic dressings as compared with the current Committee for Tactical Combat Casualty Care Guidelines standard of treatment for hemorrhage control (QuikClot Combat Gauze [QCG])...
August 2013: Journal of Trauma and Acute Care Surgery
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