There are about 15072 clinical studies being (or have been) conducted in Turkey. The country of the clinical trial is determined by the location of where the clinical research is being studied. Most studies are often held in multiple locations & countries.
The sitting or prone positions are used for posterior fossa surgery. Although the sitting position may cause hemodynamic instability, venous air embolism, it also provides optimum access to midline lesions, decreases intracranial pressure. The sitting position has not been only used in neurosurgery, it has been also used in the shoulder surgery. The sitting position related hypotension may reduce the cerebral perfusion pressure, therefore may cause cerebral ischemia. The sitting position related cerebral ischemia has been shown in the shoulder surgery. The non invasive cerebral oxymetry (INVOS-Covidien) has been used to measure cerebral oxygen saturation. Some studies has been done to investigate whether the sitting position cause cerebral desaturation or not in the shoulder surgery by non invasive cerebral oxymetry. The study results are controversial. It has been investigated that the effect of the prone position on the cerebral oxygenation in the spine surgery and the investigators found that the prone position may increase cerebral oxygenation. However, all studies have been done in patients without intracranial pathology. We speculate that due to the sitting position reduces the intracranial pressure, it may improve the cerebral oxygenation in the patients have intracranial pathology. Therefore we will compare the sitting and the prone positions effects on the cerebral oxygenation in patients undergoing posterior fossa tumour surgery by non invasive cerebral oxymetry. Method: 62 patients have posterior fossa tumour will include the study. Patients will divide to 2 groups according to the surgical position, the prone (n=31) or the sitting (n=31). Patients heart rate, mean blood pressure (MAP), cerebral oxygen saturation (SctO2), peripheral oxygen saturation (SpO2), BIS values will record before the induction of anesthesia. Five minutes after the standard anesthesia induction all values will record and it will accept as a baseline. After that all these parameters will record in each 3 minutes until the beginning of surgery. Mean while, more than 5 % reduction in SctO2 and more than 20 % reduction in SctO2 and/or MAP will record. As well as, if the SctO2 reduces than 55 and 60 %, it will record.
An optimal analgesic therapy is very important for postoperative recovery. In recent years, several studies showed that the prevalence of the moderate to severe pain after craniotomy ranged from 69 to 87% of patients. In a previous study, the investigators showed that the use of morphine based patient controlled analgesia prevented moderate to severe postoperative pain in patients undergoing supratentorial craniotomy. Morphine related side effects such as sedation, miosis, respiratory depression, nausea and vomiting produce a general reluctance for their use in neurosurgery. Therefore, all patients were closely observed to detect opioid related side effects in the intensive care unit for 24 hours following surgery in the previous study. The Integrated Pulmonary Index (IPI) is a new tool that calculates respiratory and hemodynamic parameters noninvasively. In the present study the investigators will use different doses of morphine based PCA and the IPI system to determine more effective and safer morphine dose for postoperative analgesia following supratentorial craniotomy.
Oxygen reserve index (ORI) measured by multiple wave pulse co-oximeter is a new technological development in medical science. Our aim in this study is to identify the correlation between arterial oxygen pressure (PaO2) and ORI, and to identify the specificity and sensitivity of ORI as a tool to prevent hypoxia and hyperoxia in abdominal surgery patients.
Identification of the embryo with the highest potential to implant and establish an ongoing pregnancy is a primary aim in human assisted reproduction. This task is undertaken every day by embryologists worldwide during the treatment of couples that wish to conceive by IVF. The optimal scenario is the transfer of a single embryo which gives rise to a singleton pregnancy. The current limitations in determination of embryos that have the highest implantation potential probably contribute to the low rates of pregnancy during IVF treatments. Hence, since the beginning of IVF, how to improve embryo selection has been a 'hot research topic.' Morphology has been a very obvious parameter to assess embryos as it provides a chance to evaluate them from the oocyte stage all the way to the blastocysts stage. Hence, in the first era of IVF, there were number of studies that evaluated this parameter and associated morphology with IVF success rates. On the other hand, it has been previously stated that the slight increase in pregnancy rates during IVF treatment is mostly likely a result of better practices in laboratory than morphological evaluation. Due to the limitations of morphological evaluation, several researchers have investigated adjunctive non-invasive approaches for the assessment of the embryo, such as the metabolomic profiling. Recently mass spectroscopic (MS) approaches have been utilized in limited settings. Samples needed minimal preparation; analytical analysis was rapid and large amounts of data was available. Hence, MS might be a promising approach for metabolomic profiling of embryo culture media.
"Effect of intraoperative nerve monitoring on voice quality during thyroid surgery" Thyroidectomy is a quite often surgical procedure applied by both head and neck surgeons and endocrine surgeons.Recent advances in surgical and technological area achieve a remarkable decrease in the complication rates. In case of these advances, patients still have fear related with their voice. In this study, investigators aimed to investigate voice changes during thyroid surgery and effect of intraoperative nerve monitoring to the voice quality.
Human skin undergoes some morphological changes with the effects of chronological aging and photoaging, these are especially remarkable in the facial skin. Changes in pigmentation, sallowness, deep wrinkling, laxity and elastosis are the main changes seen in photoaging and chronologic aging of skin. With the increasing demand, it needs to provide new approach for the prevention and treatment of these morphological changes. Fibroblasts have a key role on skin aging. It is known that platelet rich plasma activates the fibroblasts and increases the synthesis of collagen and other type of matrix components. Because of these specialities, platelet rich plasma is thought to be effective on skin aging.
The investigators will be evaluated the effects of a single loading dose of remifentanil (1µg/kg), administered as an adjunct to sevoflurane, on duration of hemodynamic profile, seizure activity, and recovery times during electroconvulsive therapy (ECT) in patients with major depression
The purpose of this study is to assess the effectivity of using hypertonic nasal solutions alone on the symptom scores and nasal eosinophil levels of allergic rhinitis patients, retrospectively.
This prospective clinical trial evaluates the effect of a two dose GnRH agonist administered in the luteal phase on the outcome of ART cycles stimulated with the long GnRH agonist and GnRH antagonist protocol.
To compare the effect of two different agents deksmedetomidine, remifentanil and placebo, agitation and recovery condition, on nasal septum operation.