CT腦池造影在腦積水的診斷及治療中的應(yīng)用研究
[Abstract]:Research background and purpose
Hydrocephalus is one of the most common and intractable clinical diseases facing neurosurgeons. Its pathogenesis is complex. Its fundamental treatment is surgery. Medication is mostly temporary. Imaging manifestations include ventricular cistern dilatation, or simple lateral ventricle dilatation. The causes include primary mesencephalic aqueduct obstruction, cyst or tumor compression, or cranium. Some patients have no obvious clinical symptoms. Physical examination or trauma examination found that most patients have clinical symptoms. The mechanism and classification of the occurrence of arachnoid granules are still controversial. There are two main controversies: one is the criteria of obstructive hydrocephalus and communicating hydrocephalus. At present, the diagnosis of hydrocephalus mainly relies on CT and MR imaging besides clinical symptoms. CT and MRI are convenient and less invasive, so they have important value in the diagnosis and follow-up of hydrocephalus. It is reported that diffusion. weighted imaging (DWI) and phase contrast cine can clearly differentiate the obstructive lesions, but this preliminary study confirms that the accuracy is low and the feasibility needs further study. CT cistern imaging injects non-irritating, non-metabolic water-soluble nonionic iodine into the subarachnoid space through lumbar puncture, and then nonionic iodine is injected along the cerebrospinal spine. The fluid circulatory pathway ascends retrogradely and enters the ventricles of each cistern in turn, then reaches the sagittal sinus on the convex surface of the brain to absorb blood. CT spiral scanning can show the patency of the subarachnoid space. The imaging of contrast agents between the cisterns of each ventricle can be seen by three-dimensional reconstruction, and whether the dynamics of the cerebrospinal fluid circulatory pathway has changed to determine the obstruction. Location. Before neuroendoscopy, shunting was always the first method of surgical treatment for hydrocephalus, but the problems after shunting were more complications, prone to blockage of shunt, infection, excessive or insufficient shunting, which eventually led to failure of surgery. McGirt reported 308 cases of hydrocephalus who underwent shunting because of surgical failure. Adjustments were performed 528 times. Foreign bodies were retained in patients after shunting, and the long and tall personal belongings of younger patients may need to be replaced many times. Therefore, how to avoid shunting has always been an important issue for neurosurgeons. With the development of neuroendoscopy, endoscopic treatment of obstructive hydrocephalus has become the preferred operation with surgical strikes. The long-term effect of endoscopic neurosurgery on obstructive hydrocephalus is more than 90%. It has been reported that endoscopic neurosurgery for hydrocephalus caused by ventriculoperitoneal shunt obstruction after shunt surgery has a good prognosis.
In this study, 48 cases of hydrocephalus were examined by CTC and prospectively studied to explore the value of CTC in the diagnosis and treatment of hydrocephalus. There are many different reports about which operation method is the best for the treatment of hydrocephalus. The focus of this paper is to ascertain the type of hydrocephalus by CTC, choose the correct operation method and reduce the pain of patients.
Method
1, CT cisterography in the diagnosis of hydrocephalus
CT cisternography was performed in 48 patients with hydrocephalus from February 2011 to December 2012 in neurosurgery department of our hospital. The types of hydrocephalus were diagnosed and the treatment methods were selected according to the results of CT cisternography.
2, CT cisterography in hydrocephalus after endoscopic three ventriculostomy.
Twenty-four patients with obstructive hydrocephalus underwent three-ventricular floor fistula. Eight patients were randomly selected for a one-week follow-up of CTC. The improvement of cerebrospinal fluid pathway after three-ventricular floor fistula was analyzed according to the diffusion of contrast media. Follow up of imaging data.
2, statistical processing
All the results were analyzed by SPSS13.0 software. T test, variance analysis and chi-square test were used. P < 0.05 was regarded as statistically significant.
Result
1. The application of CT ventriculography in the diagnosis of hydrocephalus.
1.1. Imaging findings: All 48 patients underwent cranial CT examination before operation, 40 patients underwent cranial MR examination, 48 patients underwent CT cisternography, of which 22 patients underwent ventricular cisternography, ventricular cisternography and subarachnoid cavity contrast medium filling, which confirmed communicating hydrocephalus; 26 patients had different degrees of infarction in the diffusion pathway of contrast medium. Obstruction is diagnosed as non communicating hydrocephalus.
(1) communicating hydrocephalus: bilateral ventricles of cistern imaging with persistent detention were diagnosed as communicating hydrocephalus. Contrast agent diffused to lateral ventricle and third ventricle, fourth ventricle and fourth ventricle were seen in coronal image. Contrast agent diffused from occipital cistern to fourth ventricle to third ventricle and bilateral ventricle through midbrain aqueduct. The cistern and supratentorial subarachnoid space were well filled.
(2) Non-communicating hydrocephalus: most of them are obstructive hydrocephalus. The images of cistern have no fixed features, and there are different manifestations because of different obstructive sites. The lateral ventricle is not usually developed. Contrast media of some patients with obstructive hydrocephalus remain in the occipital cistern and basal cistern for a long time.
1.2, the comparison between CTC and routine CT/MRI diagnosis.
The results of CT cistern imaging showed that 26 cases were non-communicating hydrocephalus, of which 15 cases were diagnosed as obstructive hydrocephalus by routine CT/MRI, which accorded with the results of CTC. In the examination, 2 cases were diagnosed as obstructive by traffic diagnosis, 5 cases were diagnosed as communicating by obstruction, and the diagnostic accuracy was 85.4%.
1.3, the effect of intracranial pressure on the diffusion of contrast agents.
In order to investigate the effect of intracranial pressure on the diffusion of contrast media, 41 cases of ventriculo-cisternography were retrospectively analyzed. The ventriculo-cisternography in 41 cases was filled with contrast media, and the same contrast mode and diffusion time were used. Two groups, one group of lumbar puncture pressure (> 200 mm H2O) and the other group of lumbar puncture pressure in the normal range, that is, 200 mm H2O, were compared by two groups of contrast media in the ventricular cistern CT value (Hu).
2. Application of CTC in hydrocephalus endoscopic three Ventriculostomy
(1) MRI was performed in 24 patients 6 months after operation. The ventricular cistern was significantly reduced in 14 of them, and the symptoms of headache and dizziness disappeared before operation. Among them, 3 patients with preoperative disturbance of consciousness were significantly improved after operation; 5 patients with slight reduction of ventricular cistern and obvious improvement of clinical symptoms; 6 patients with no significant changes in imaging, 4 of them were significantly improved in clinical symptoms. 1 cases were improved after ventriculoperitoneal shunt for hydrocephalus.
(2) 24 patients were examined by lumbar puncture 3 days after operation, and mannitol injection was used intravenously before lumbar puncture excluding lumbar puncture. Among them, 13 cases had lumbar puncture pressure of 70-100 mm H2O, 6 cases had lumbar puncture pressure of 110-150 mm H2O, 3 cases had lumbar puncture pressure of 160-180 mm H2O, and 2 cases had lumbar puncture pressure of more than 180 mm H2O. Good.
(3) Eight cases were randomly selected one week after operation for CTC reexamination. The results showed that the ventricles of 8 cases were filled with contrast media. Three cases had evident dilatation of the fourth ventricle before operation, and the fourth ventricle was significantly reduced after operation.
conclusion
1. CT cisternography plays an important role in the diagnosis of hydrocephalus, especially in the differential diagnosis between obstructive hydrocephalus and communicating hydrocephalus. CTC provides a reliable basis for the surgical treatment of hydrocephalus and the choice of surgical methods. CTC has a higher diagnostic accuracy than conventional CT/MRI.
2. It is safe and effective to perform CT cisternography at a reasonable dose. Although CT cisternography is a invasive method, it is a simple, safe, reliable and rapid method for definite diagnosis of hydrocephalus.
3. Intracranial pressure does not affect the effect of contrast media diffusion in CT ventriculo cisternography via lumbar puncture. ConclusionIntracranial pressure can be neglected to increase or decrease the dose of contrast media in CT ventriculo cisternography to further improve the safety and effectiveness of contrast media.
4. Postoperative CTC can evaluate the effect of hydrocephalus. It is necessary for patients with obstructive hydrocephalus who can not be diagnosed clearly by CT and MR to have CTC. Neuroscopic fistula should be considered when the operation indication is reached. Evaluate the effect of operation.
5. Neuroendoscopic surgery has the advantages of small injury, short operation time, direct vision, clear imaging, wide visual angle, quick recovery, fewer complications, and good long-term effect. Compared with the previous simple ventriculoperitoneal shunt, the emergence of neuroendoscopy undoubtedly reduces the patient's long-term pain and inconvenience with the tube. Neuroendoscopic fistula surgery is effective for obstructive hydrocephalus. Treatment.
The innovation of this research
1. CT cisternography is a reliable criterion for the diagnosis of hydrocephalus, especially for the diagnosis of obstructive and communicating hydrocephalus which is difficult to differentiate, and provides a basis for guiding treatment and preliminary curative effect.
2, through CTC examination, there is a safe and reliable diagnostic method for hydrocephalus classification.
3, CTC is a reliable index to evaluate the effect of endoscopic three ventriculostomy.
【學(xué)位授予單位】:南方醫(yī)科大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2013
【分類(lèi)號(hào)】:R816.1;R742.7
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