scholarly journals Ensuring a safe and adequate blood supply during the COVID-19 pandemic: the Moroccan national blood center experience

2020 ◽  
Vol 37 ◽  
Author(s):  
Sabah Bouhou ◽  
Mohammed Benajiba
2021 ◽  
Vol 15 (1) ◽  
pp. 127-136
Author(s):  
Alexandrino Pereira dos Santos Neto ◽  
Sandra Maria Alves Sayão Maia ◽  
Jair Carneiro Leão ◽  
Iliana Lins Quidute ◽  
Carolina dos Santos Guimarães ◽  
...  

Background: Unfinished root formation has always offered challenges in endodontics due to technical difficulties and weakened teeth resistance during the lifetime of an individual. Pulp revascularization therapy appeared as a solution for apical closure and root maturation. The existence of oral stem cells involved in the process associated with traditional resident cells requires adequate blood supply given by induced controlled injury deliberately accomplished into the periapical zone. Objective: The aim of this work was to research, through literature review, the main mechanisms involved in the process of apical closure through the technique of pulp revascularization. Conclusion: Apice closure in pulpless teeth seems to happen as a result of professional intervention and biological activity. The success rate depends on the role of traditional local immune cells and stem cells associated with adequate blood supply to finish root formation.


1945 ◽  
Vol 2 (1) ◽  
pp. 49-71 ◽  
Author(s):  
I. M. Tarlov ◽  
J. A. Epstein

2014 ◽  
Vol 4 ◽  
pp. 81
Author(s):  
Humera Khatoon ◽  

Objective of this study is to determine the awareness among student of Pharm D with Angina Pectoris (AP) regarding the disease, sign & symptoms and treatment.The term Angina Pectoris is applied to varying forms of transient chest discomfort that are attributable to insufficient myocardial oxygen. The classic description of angina is a crushing pain that radiates through the chest and sometimes down the arm, neck, teeth /jaw or into the back, which is usually aggravated by exertion or stress. Angina is a warning sign that the heart muscle is not getting adequate blood supply and specially oxygen and it may lead to myocardial infarction or a heart attack


Neurosurgery ◽  
1979 ◽  
Vol 4 (4) ◽  
pp. 334-337 ◽  
Author(s):  
Robert F. Spetzler ◽  
Michael P. Owen

Abstract This case required the clipping of a single branch of the middle cerebral artery for the treatment of a traumatic aneurysm. To ensure an adequate blood supply distal to the occlusion, we anastomosed the superficial temporal artery to that branch of the middle cerebral artery (MCA) distal to the aneurysm. Despite the low flow required to irrigate only one branch of the MCA, the anastomosis remained patent. This case demonstrates the feasibility of performing small vessel anastomoses in spite of low flow demand.


2017 ◽  
Vol 45 ◽  
pp. 3
Author(s):  
Annalú Pinton Ferreira ◽  
Alana Lucena Oliveira ◽  
Giuliano Queiroz Mostachio ◽  
Joana Zafalon Ferreira ◽  
Stephanie Fernandez ◽  
...  

Background: In facial reconstruction, several kinds of grafts can be used, like bone grafting, cutaneous grafting, biological membranes, fasciae latae, biomaterials, and others. The advantage of using fasciae latae in the tissue reparation is the need of little blood supply, making it a viable option in the restoration of biological functions. The objective of this study was to describe the case of a female poodle, 12-year-old, and with subcutaneous emphysema due to fracture of the nasal bone, submitted to cranioplasty using fasciae latae.Case: It was attended a 12-year-old female poodle due to a traumatic brain injury. At physical examination, the animal had presented facial swelling and respiratory distress with inspiratory effort. Additionally, were verified subcutaneous emphysema and a depression in the nasal plane region with crepitus on palpation. Radiographic examinations revealed nasal bone and maxilla fractures. The animal was submitted to cranioplasty for nasal bone fracture repair. To access the nasal bone and frontal sinus was performed an incision in the dorsal midline from the level of medial orbital rim to the nasal plane. The subcutaneous tissue was divulsioned to allow the exposure of the nasal bone fracture, whose small fragments prevented the internal fixation. The bone defect was then repaired using free autologous fasciae latae of 2 cm wide x 3 cm long, sutured to the periosteum. Subcutaneous emphysema gradually decreased until its resolution at three days postoperatively. The surgical wound had complete healing at 10 days after surgery without concomitant complications.Discussion: The choice of the reconstructive technique is based on the operative planning and the surgeon’s experience. In the present case we opted for the autologous fasciae latae graft since its ready availability and lesser predisposition to immunogenic sensibilization and rejection. In addition, we opted for the autologous fasciae latae graft because it is an occlusive material that would prevent the air flow through it during the inspiration and expiration, and consequently the aggravation of the subcutaneous emphysema. In fact, the resolution of the subcutaneous emphysema occurred three days after grafting. Furthermore, the resolution of the subcutaneous emphysema was determined by the lower retraction of the autologous fasciae latae graft due to the scar fibrous tissue deposition. The choice of the reconstructive technique is also based on the viability of the recipient bed, which should provide adequate blood supply for the reception of the free graft. In the present case, however, the bone defect did not provide adequate blood supply and structural support. Due to this, the autologous fasciae latae graft was crucial to the verified results, since it requires less blood supply and structural support to remain the graft viable. We concluded that the autologous fasciae latae graft may be a viable option for the anatomical and functional reconstruction of traumatic lesions localized in the skull, particularly the nasal bone, due to the satisfactory follow-up in the present case without the occurrence of complications. A larger sample size, however, it is necessary to evaluate the real effectiveness of the autologous fasciae latae graft in reconstructive skull surgery on small animals.


1933 ◽  
Vol 26 (7) ◽  
pp. 853-859 ◽  
Author(s):  
Watson Jones ◽  
R. E. Roberts

Pathology of calcification and ossification.—The Leriche-Policard theories. Hyperæmia of bone causes decalcification. Reduced blood supply causes sclerosis. Diminution of vascularity of fibrous tissue causes calcification. Excess of calcium, adequate blood supply and fibroblasts give rise to bone anywhere. Subperiosteal ossification. “Myositis ossificans.” Radiological significance of density of bone shadows.—Decalcification of disuse, of infections, of neoplasms. Traumatic and infective scquestra. Evidence that a fragment of bone is avascular. Hyperæmic decalcification of bone.—Delayed and non-union of fractures. Kummel's disease. Spontaneous hyperæmic dislocation of the atlas. Hyperæmic decalcification and nephrolithiasis. Anæmic sclerosis of bone.—Syphilitic bone disease. Malignant bone disease. Fragility of sclerosed bone—Paget's, Kienboch's, Kohler's and Panner's, Albers-Schönberg's diseases. Pathological calcification.—Calcification of supraspinatus tendon. Calcification of tumours—angioma, hæmatoma, and thrombosed vessels, lipoma, cysts, etc. Calcification of semilunar cartilages and intervertebral discs. Pathological ossification.—Ossification of tendons. Ossification of semilunar cartilages.


1984 ◽  
Vol 4 (3) ◽  
pp. 391-396 ◽  
Author(s):  
George McHedlishvili ◽  
Nina Kuridze

We have investigated the pial arterial microcircles formed by the consecutive ramifications and anastomoses of minute pial vessels on the surface of the cerebral neocortex in various vertebrate species, representatives of various levels of phylogenic development. We found that the pial arterial microcircles became gradually more complex in the following order: hen < rabbit < cat < dog < monkey. The gradual development of microcircles involves various features in these species: (a) They become formed predominantly of smaller pial arterial branches whose vasomotor activity is much higher as compared with that of the larger ones; (b) each circle occupies a smaller area, and hence the number of circles per surface of neocortex increases; (c) the density of arterial branches feeding the circles increases despite the smaller size of the latter; (d) the number of offshooting precortical and radial arteries penetrating the cortex increases; (e) the areas of neocortex fed by individual radial arteries get gradually smaller. Thus, the development of the pial arterial bed contributes more and more toward precise spatial regulation of an adequate blood supply to increasingly smaller areas of neocortical tissue as we rise toward higher levels in phylogeny.


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