It takes a cross-sectional image of the vessel and allows the assessment of a percentage stenosis. The results of stenosis treatment can be evaluated by means of IVUS. It allows accurate assessment of re-stenosis following angioplasty and has resulted in the finding that a stent placement can prevent re-stenosis. Boston Scientific Corp ((n.d.):2) states that IVUS is applied in the investigation of lesion significance and lesions of which an angiographical determination could not be made. It serves as a guiding tool during stent placement and peripheral interventions.
Autonomic nerves lie anterior to Denonviliers ' fascia, thus working within fascia propria avoid injury to autonomic pelvic nerves . This study evaluates the short term outcomes of trans anal full thickness procedure for cases of rectosigmoid Hirschsprung 's disease by performing dissection tightly on the rectal wall within the fascia propria to prevent injury of pelvic nerves and other structures and avoid obstructive symptoms associated with other procedures like Soave (muscular cuff) or Duhamel (spur
Donor tissue is prepared by trephining a previously excised corneoscleral button. The donor button is usually trephined to be about 0.25 mm larger in diameter than the planned diameter of the host opening to facilitate watertight closure, minimize postoperative flattening and reduce the possibility of postoperative glaucoma. A mechanically-guided trephination is standard although newer non-mechanical laser techniques are more accurate and are preferred by some surgeons when available (Gaster et al., 2012). Gaster RN, Dumitrascu O, Rabinowitz YS. Penetrating keratoplasty using femtosecond laser-enabled keratoplasty with zig-zag incisions versus a mechanical trephine in patients with keratoconus.
Thrombosis Formation Thrombosis is the formation of a thrombus within the vascular system. Development of thrombosis after vessel wall injury is characterised by the deposition of platelets, tissue factor and fibrin. A thrombus is a solid or semi-solid mass, which consists of aggregated platelets, that form a platelet plug and a mesh of cross-linked fibrin protein. The formation of a thrombus is a healthy response to blood vessel injury intended to prevent blood loss, and is the first step in restoring haemostasis. Blood vessel damage can also be caused by the interaction between a foreign material (medical device) and the endothelium lining of the vessel.
Vena cava filters are small mechanical devices that are positioned in the vena cava with the sole purpose of preventing large blood clots from travelling from the legs to the pulmonary arteries. Clots reaching the arteries of the lungs may cause pulmonary embolism, which is a life-threatening condition. Aneurysms of the aorta as well as dissections may be treated with the use of endoluminal stent grafts. This requires the placement of a reinforcing tube within the affected parts of the
Surgical Repair If the thoracic aortic aneurysm become larger or you are already causing symptoms, you will need a quick treatment to prevent a rupture from occurring. The weakened section of the vessel can be replaced with a stent graft of artificial material and surgically removed. If the aortic aneurysm is so close to the aortic valve (the one that regulates blood flow from the heart into the aorta), a valve should be replace if the physician recommended it during the
Often times, patients will undergo chemotherapy or radiation therapy to shrink the tumor before getting surgery to remove it entirely. However, this is not the only way different treatments are used in conjunction with one another. By carefully assessing the location, size, and stage of the tumor and analyzing the patient’s medical history, age, symptoms, and a variety of other factors, oncologists will design an efficient treatment plan with the least amount of
The MRI scan of the brain began with non – contrast scanning of the brain. Since Angiocentric Glioma pathological features are similar with other types of brain tumors such as astrocytomas and ependymomas, this made the diagnosis using MRI become more challenging. The tensor tractography imaging was used in the diagnostic including the axial and sagittal T1 weighted, axial T2 weighted, axial diffusion-weighted and also axial diffusion. From the non – contrast scanning in T1 weighted image, scalp appear bright in the image. Meanwhile skull of the brain was in dark signal.
Abstract — Brain magnetic resonance (MR) segmentation algorithms are critical to analyze tissues and diagnose edema and tumor in a quantitative way. The primary aim of brain image segmentation is to partition a given brain image into different regions representing anatomical structures. In this paper, we present a new effective segmentation algorithm that segments brain MR images into tumor, edema, white matter (WM), gray matter (GM), and cerebrospinal fluid (CSF). The detection of the healthy tissues and the diseased tissues are performed for examining the change caused by the spread of tumor and edema on healthy tissues is very important for treatment planning. We developed an algorithm for skull stripping before the segmentation process.
Intracranial pressure monitoring practice in patients with diffuse axonal injury and GCS under 8. Place the intracranial through a drill hole in the fiber optic catheter, which measures the pressure. Pressure measurement adjustments help correct treatment of cerebral edema. The existence of post traumatic increased intracranial pressure is a serious progrostic sign. Such patients often benefit from treatment with mannitol, deep sedation, hyperventilation or cerebrospinal fluid drainage by