Ahmed Zohdi - Academia.edu (original) (raw)

Papers by Ahmed Zohdi

Minimally Invasive Neurosurgery, Oct 1, 2006

The aim of this study is to discuss the variations in the morbid anatomy of colloid cysts with it... more The aim of this study is to discuss the variations in the morbid anatomy of colloid cysts with its impact on the choice of endoscopic approach through a standard Kocher's burr hole. Methods: This study was conducted on 18 patients between 1996 and 2006. All patients were operated through a single burr hole at Kocher's point using a rigid endoscope with a single working channel. The anatomical variations of the cyst and the foramen of Monro dictated the use of the transforaminal approach, the transseptal interforniceal approach or both. Results: There were no mortalities or significant morbidities. The operative time ranged between 90 to 240 minutes (with a mean of 110 minutes). Five patients (27.7 %) developed remediable postoperative chemical meningitis successfully controlled with steroids. Postoperative transient memory disturbance was observed in 3 patients (16.7 %). One patient had a postoperative CSF leak that stopped spontaneously. Aspiration of the cyst's contents showed variable degrees of resistance to aspiration. The period of follow-up ranged between 5 months to 8 years and 3 months (mean: 4 years and 2 months). None of our patients showed radiological evidence of cyst recurrence during the follow-up period. Conclusion: Through a single right pre-coronal burr hole at Kocher's point, several endoscopic manoeuvres can be done. These include aspiration of the contents or its piecemeal removal, combined balloon squeeze and aspiration, foraminoplasty, pellucidotomy, coagulation of cyst capsule and ETV. The choice of the appropriate approach is largely dependent on the location of the cyst and the shape of the foramen of Monro. Coronal MRI may aid in preoperative evaluation of the tucked up retroforaminal growth of the cyst. We had no recurrence in our series with a follow-up reaching more than 8 years. This could be attributed to both the marsupialization and coagulation done for the remaining cyst capsule.

min - Minimally Invasive Neurosurgery, 1998

Seventy-eight cases of late-onset, non-communicating hydrocephalus were operated upon by third ve... more Seventy-eight cases of late-onset, non-communicating hydrocephalus were operated upon by third ventriculocisternostomy. The distortion in the anatomy of the dilated third ventricular floor dictated the selection of the target area. The optimal site for the perforation was the translucent, bluish and thinned out part of the floor. This was variable and in 76.9% not in the midline with more than one fenestra done in 35.9%. the size of the ventriculocisternostomy needed not be around 5 mm. Smaller sized openings in a taut floor (60.3%) served the same purpose as bigger ones in a redundant area (39.7%). The success of the procedure could be predicted from the profuse downward flow of cerebrospinal fluid through the perforation, &amp;quot;Whirl Sign&amp;quot;. An acceptable assurance of our results was confirmed both clinically and radiologically. The outcome in our series had four grades, namely cured in 78.2%, ameliorated, but still needed diversion, in 16.7%, status quo in 2.5%, and complicated in 2.5%.

Springer eBooks, 1991

The development of technical standards in neurosurgery has led to solution of formerly difficult ... more The development of technical standards in neurosurgery has led to solution of formerly difficult problems without great risks to patients. One of these problems is the surgery of vascular lesions involving the cavernous sinus region.

Journal of Neurological Surgery Part A: Central European Neurosurgery

Background: The 12-year collaboration between Greifswald and Cairo Universities in Neurosurgery h... more Background: The 12-year collaboration between Greifswald and Cairo Universities in Neurosurgery has recently reached stable steps in post-graduate education represented in the bi-institutional fellowship of Neuro-endoscopy. Aim: We present our new experience of upgrading the level of bi-institutional collaboration to serve for highly skilled undergraduate training. Methods: we started a summer school program for the Egyptian medical students, with the target of allowing better orientation with the specialty Results: 10 candidates (6 males and 4 females) were selected to participate in the program. All candidates successfully finished the summer school and stated they would recommend this activity to their colleagues. Conclusion: We recommend the summer school activities either within the host university or abroad in a collaborate university to the students that would be preselected to fit in the planned program. It is our opinion this would assist the young generations in choosing t...

Journal of Neurosurgery: Pediatrics

OBJECTIVE Hydrocephalus is the most common brain disorder in children and is more common in low- ... more OBJECTIVE Hydrocephalus is the most common brain disorder in children and is more common in low- and middle-income countries. Research output on hydrocephalus remains sparse and of lower quality in low- and middle-income countries compared with high-income countries. Most studies addressing hydrocephalus epidemiology are retrospective registry studies entailing their inherent limitations and biases. This study aimed to investigate child-related, parental, and socioeconomic risk factors of congenital hydrocephalus (CH) in a lower-middle-income country. METHODS An investigator-administered questionnaire was used to query parents of patients with CH and controls who visited the authors’ institution from 2017 until 2021. Patients with secondary hydrocephalus and children older than 2 years of age at diagnosis were excluded. Uni- and multivariable logistic regression was performed to identify the factors affecting CH development. RESULTS Seven hundred forty-one respondents (312 cases and...

Neurosurgery, 2021

To the Editor: Despite the fast progress in the field of neurosurgical training, there are still ... more To the Editor: Despite the fast progress in the field of neurosurgical training, there are still challenges in delivering the needed knowledge and skills to young neurosurgeons all over the world. 1-3 The collaboration between several neurosurgical institutes in developed and developing countries resulted in several research and clinical achievements. 4-6 In our experience, we started a new trend of collaboration that served in several types of academic, research, and clinical developments. The collaboration between the two neurosurgical institutes in Greifswald and Cairo Universities began 10 yr ago with a primary doctor exchange program. After 2 yr, a coordinator was appointed to serve as an academic and research liaison between the two medical institutes in Germany and Egypt, who accordingly kept an opened bridge for further research and clinical work. 7-9 Recently, with the support of the German Academic Exchange Service (DAAD), a new teaching tool was developed to cope with FIGURE. Showing the pathway toward accomplishment of all fellowship requirements.

ISMINS Educational Meeting in 15th NAM Annual Scientific Meeting/Annual General Meeting, 2015

Interdisciplinary Neurosurgery

Background: Brain abscess accounts for 8% of intracranial lesions in developing countries, where ... more Background: Brain abscess accounts for 8% of intracranial lesions in developing countries, where as in the west it accounts about 1-2%. The ideal way in management of intracranial abscesses remains a matter of controversy. Objectives: Our aim in this study is to put an updated protocol of antibiotics for management of brain abscesses and to evaluate it regarding clinical and radiological outcome, recurrence rate, duration of antibiotic usage, and the duration of hospital stay. Patients and Methods: This study was done over 30 patients presenting between November 2013 and June 2015 with intracranial abscesses managed either medically or surgically by aspiration through a bur hole, excision with open craniotomy, with a specific protocol of antibiotics and then followed up clinically and radiologically. Results: There were twenty male (66.7%) and ten females (33.3%). A nearby cranial infection was the most common predisposing factor in fourteen patients (46.6%). The temporal lobe was t...

British Journal of Neurosurgery

The Medical Journal of Cairo University, 2021

Asian Journal of Neurosurgery, 2013

groups, infants younger than one year of age have a higher failure rate for ETVs compared with ol... more groups, infants younger than one year of age have a higher failure rate for ETVs compared with older children. [5-8] The conclusion has been drawn that patients younger than one year of age are not candidates for ETV and should undergo placement of a V-P shunt instead. [9] Materials and Methods The study was done prospectively in the Neurosurgery Department, Pediatric Unit of the Specialized Children University Hospital, on infants admitted in the period from September 2009 through April 2010, suffering from obstructive hydrocephalus. The study was carried out to study the success rate of ETV as a treatment for hydrocephalus in such age group, in cases of evident failure clinically by progressive head enlargement or cerebrospinal fluid (CSF) leak proved radiologically by enlargement of the ventricles and/or periventricular permeation, a V-P shunt is applied. Inclusion criteria i. Age of six months or less. ii. Obstructive hydrocephalus (Aqueductal stenosis). iii. Normal or collapsed fourth ventricle.

Objective: This study assessed the success rate of ETV in patients below 2 years of age regardles... more Objective: This study assessed the success rate of ETV in patients below 2 years of age regardless the etiology of obstructive hydrocephalus. Method: We collected 35 patients of obstructive hydrocephalus aged below 2 years at time of ETV from 12/1994 till 12/2012 treated by ETV either as[for full text, please go to the a.m. URL]

After posterior fossa surgery, hydrocephalus may persist or evolve. Proper management of this com... more After posterior fossa surgery, hydrocephalus may persist or evolve. Proper management of this complication requires timely detection. Postoperative intracranial pressure monitoring has been used in ten patients harboring posterior fossa tumours. Only two patients ultimatelyhad to be shunted. This tool has proved to be safe and reliable for early detection and management of persistent hydrocephalus following posterior fossa surgery.

cases of pineal region tumours in the pediatric age group constitute the subject of this study. A... more cases of pineal region tumours in the pediatric age group constitute the subject of this study. After thorough investigations both clinical, radiological and laboratory, they were all operated upon by a ventriculo-peritoneal shunt to divert the cerebrospinal fluid. This was followed in 15 cases by the favoured occipital transtentorial approach and in one by the supracerebellar infratentorial approach. The microsurgical bipolar suction irrigation technique was used in all cases. The aim was to decompress as much as possible of the lesion mounting to complete excision and to attain ample biopsy for tissue diagnosis. There were no surgical mortalities. The outcome was excellent in 14 cases, one surgical morbidity in a highly invasive tumour, one incident of transient visual field defect and only one mortality due to haematemesis two weeks postoperative. ALTHOUGH pineal region tumours are responsible for only a small percentage (0.4 to 1%) of neoplasms of the brain, yet they have raked ...

Purpose: Monitoring of somatosensory evoked potentials (SSEPs) serves as an early warning system ... more Purpose: Monitoring of somatosensory evoked potentials (SSEPs) serves as an early warning system to detect spinal cord injury and is correlated with postoperative sensory findings. It is an indirect indicator of motor function. This study aimed to evaluate the usefulness of intraoperative SSEPs monitoring as a stand-alone tool during spinal surgeries when motor evoked potentials are not available, to prevent and predict new postoperative neurologic deficits. Motor evoked potentials were not used as the equipment needed to record them was not available at the time of this study. Methods: This study included 50 patients, aged 14 to 67 years, undergoing extramedullary manipulations, decompression of an epidural abscess or neoplasm, removal of intramedullary tumor, or arteriovenous malformation or spine correction procedures. Somatosensory evoked potentials were analyzed for latency and peak-to-peak amplitude. Critical SSEP changes were defined as a 50% decrease in amplitude or a 10% in...