LIVIVO - Search results -

Search results

Result 1 - 10 of total 31

Search options

Article: Clinical and Radiological Outcomes of Dura-Splitting versus Duraplasty Techniques in Pediatric Chiari I Malformation: A Systematic Review and Meta-Analysis.

Tavallaii, Amin / Keykhosravi, Ehsan / Ghorbanpour, Ahmad / Shahriari, Ali / Rezaee, Hamid

2023 Volume 18, Issue 3, Page(s) 423–436

Abstract: Type I Chiari malformation is a developmental anomaly with various proposed surgical techniques for its management. The dura-splitting technique is a less invasive approach and involves the resection of the outer layer of the dura while sparing the ... ...

Abstract	Type I Chiari malformation is a developmental anomaly with various proposed surgical techniques for its management. The dura-splitting technique is a less invasive approach and involves the resection of the outer layer of the dura while sparing the internal layer. While this less-known approach may minimize the complication rates, there are concerns about its efficacy and outcome. Therefore, we have performed a systematic review and meta-analysis of available data on clinical and radiological outcomes of this technique in the pediatric population and compared them to the foramen magnum decompression and duraplasty technique. We have followed the Meta-analysis Of Observational Studies in Epidemiology guidelines in this review. Based on our predefined search strategy, we performed a systematic database search. Subsequently, the article screening process was done based on defined inclusion/exclusion criteria. Following the quality assessment of included studies, two authors performed data extraction. Finally, the extracted data were summarized and presented in form of tables. Forest plots were used to demonstrate the results of the meta-analysis. A review of 8 included studies consisting of 615 patients revealed the significant advantage of the dura-splitting technique in terms of shorter operation duration and hospital stay. The recurrence rate and clinical and radiological outcomes were almost similar between the two surgical techniques. Complication rates were significantly lower in the dura-splitting technique. Dura-splitting can be an effective and safe approach for the management of pediatric Chiari I malformation. However, these results are mostly extracted from observational studies and future randomized controlled trials are recommended.
Language	English
Publishing date	2023-05-01
Publishing country	India
Document type	Journal Article ; Review
ZDB-ID	2621446-5
ISSN	2248-9614 ; 1793-5482
ISSN (online)	2248-9614
ISSN	1793-5482
DOI	10.1055/s-0043-1764324
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Article: Characteristics and In-Hospital Outcomes of Pediatric Traumatic Spinal Injuries in A Referral Trauma Center.

Rezaee, Hamid / Keykhosravi, Ehsan / Tavallaii, Amin

Bulletin of emergency and trauma

2021 Volume 9, Issue 4, Page(s) 178–182

Abstract: Objective: To evaluate the characteristics and in-hospital outcomes of traumatic spinal injuries among children admitted to a local trauma center in Iran.: Methods: Patients aged 0-18 years who had been admitted to Shahid Kamyab trauma center for ... ...

Abstract	Objective: To evaluate the characteristics and in-hospital outcomes of traumatic spinal injuries among children admitted to a local trauma center in Iran. Methods: Patients aged 0-18 years who had been admitted to Shahid Kamyab trauma center for acute traumatic spinal injury (Mashhad, Iran) between 2011 and 2018 were evaluated retrospectively. Various demographic, clinical, radiological, and outcome variables were recorded and analyzed. Results: A total of 127,300 trauma patients were evaluated and amongst them, 61 children had spinal trauma. The mean age was 11.1 and there was no significant sex preponderance (54% males). Most of the injuries were occurred in summer (34.4%) and the most common trauma mechanism was motor vehicle accidents (55.7%) followed by falling (36.1%). Almost all patients (95.1%) had vertebral fractures, which were in the cervical, thoracic, and lumbosacral area in order to decrease incidence. 67.2% of patients were managed non-surgically. The mean hospital stay was 8.9 days and 82.0% of patients had been discharged with normal motor function. Conclusion: Pediatric spinal trauma is less studied entity in the field of traumatology due to the lower prevalence of these injuries in pediatric patients worldwide. But our study shows a higher prevalence of such injuries in the pediatric population. Although controversial, the leading cause of these injuries is motor vehicle accidents. Fortunately, short term in-hospital outcome seems to be good in such injuries.
Language	English
Publishing date	2021-10-20
Publishing country	Iran
Document type	Journal Article
ZDB-ID	2722734-0
ISSN	2322-3960 ; 2322-2522
ISSN (online)	2322-3960
ISSN	2322-2522
DOI	10.30476/BEAT.2021.91333.1275
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Pseudoaneurysm formation after placement of a FRED flow diverter stent in a patient with iatrogenic ICA injury during transsphenoidal surgery: A case report.

Hasanpour, Mohammad / Golchin, Navid / Mirsardoo, Hojjat / Alagha, Ahmad / Elyassirad, Daniel / Keykhosravi, Ehsan

Neuro-Chirurgie

2023 Volume 70, Issue 1, Page(s) 101520

MeSH term(s)	Humans ; Aneurysm, False/diagnosis ; Aneurysm, False/etiology ; Aneurysm, False/surgery ; Stents/adverse effects ; Pituitary Neoplasms/surgery ; Pituitary Neoplasms/complications ; Iatrogenic Disease
Language	English
Publishing date	2023-12-05
Publishing country	France
Document type	Case Reports ; Letter
ZDB-ID	207146-0
ISSN	1773-0619 ; 0028-3770 ; 0150-9586
ISSN (online)	1773-0619
ISSN	0028-3770 ; 0150-9586
DOI	10.1016/j.neuchi.2023.101520
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Uk I Zs.196: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article: Insights into Stability of Silica Nanofluids in Brine Solution Coupled with Rock Wettability Alteration: An Enhanced Oil Recovery Study in Oil- wet Carbonates

Keykhosravi, Amin / Simjoo, Mohammad

Colloids and surfaces. 2019 Sept. 22,

2019

Abstract: Stability of nanoparticle dispersion in brine solution is a key parameter for a successful nanofluid- based enhanced oil recovery processes. This paper aims to provide a systematic laboratory study to investigate the stability of silica nanoparticles ( ... ...

Abstract	Stability of nanoparticle dispersion in brine solution is a key parameter for a successful nanofluid- based enhanced oil recovery processes. This paper aims to provide a systematic laboratory study to investigate the stability of silica nanoparticles (NPs) in presence of mono and divalent salts, namely NaCl and MgCl2, coupled with their potential to alter wettability of low-permeable, oil-wet carbonates at 80 °C. First, silica nanofluids with different salt concentrations were prepared using sonication process. Results showed that presence of divalent cations significantly hinders the stability of silica nanofluids as compared to monovalent ones. It was found that most of silica NPs was precipitated in presence MgCl2 even at a low concentration of 2000 ppm while no particle precipitation was observed with 10000 ppm NaCl over a two- week period. This was in line with a smaller particle size of silica NPs with 10000 ppm NaCl (73 nm) as compared to MgCl2, 388 nm. Also, we found a noticeable reduction in zeta potential of silica nanofluids with MgCl2, −8 mV, as compared to NaCl, −25 mV. This reveals that the negative surface charge of silica NPs became more neutralized in presence of MgCl2 and thus more chance for agglomeration of silica NPs through the aqueous phase. As to rock- nanofluid interaction, silica nanofluids in presence of NaCl exhibited a higher potential to alter rock wettability to more water-wetness than MgCl2. Such wettability alteration was discussed in terms of adsorption of silica NPs on the carbonate rock followed by a generation of thin layer of silica NPs on the rock surface, leading to an extra pressure on oil droplet. This was in line with SEM- EDX analyses indicting that silica NPs covers the carbonate rock surface. In terms of oil recovery, imbibition of silica nanofluid containing 10000 ppm NaCl provided 14% incremental oil while the lowest oil recovery was obtained for silica nanofluids containing MgCl2 due to their less stability. These results showed that there could be a correlation between the stability of silica nanofluids and their EOR potential, which is strongly dependent on the salt type and concentration.
Keywords	adsorption ; brine solutions ; carbonate rocks ; carbonates ; cations ; droplets ; energy-dispersive X-ray analysis ; imbibition ; magnesium chloride ; nanofluids ; nanoparticles ; neutralization ; oils ; particle size ; scanning electron microscopy ; silica ; sodium chloride ; sonication ; wettability ; zeta potential
Language	English
Dates of publication	2019-0922
Publishing place	Elsevier B.V.
Document type	Article
Note	Pre-press version
ZDB-ID	1500517-3
ISSN	0927-7757
ISSN	0927-7757
DOI	10.1016/j.colsurfa.2019.124008
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Article: Clinical and Radiological Outcomes of Dura-Splitting versus Duraplasty Techniques in Pediatric Chiari I Malformation: A Systematic Review and Meta-Analysis

Tavallaii, Amin / Keykhosravi, Ehsan / Ghorbanpour, Ahmad / Shahriari, Ali / Rezaee, Hamid

Asian Journal of Neurosurgery

2023 Volume 18, Issue 03, Page(s) 423–436

Abstract	Type I Chiari malformation is a developmental anomaly with various proposed surgical techniques for its management. The dura-splitting technique is a less invasive approach and involves the resection of the outer layer of the dura while sparing the internal layer. While this less-known approach may minimize the complication rates, there are concerns about its efficacy and outcome. Therefore, we have performed a systematic review and meta-analysis of available data on clinical and radiological outcomes of this technique in the pediatric population and compared them to the foramen magnum decompression and duraplasty technique. We have followed the Meta-analysis Of Observational Studies in Epidemiology guidelines in this review. Based on our predefined search strategy, we performed a systematic database search. Subsequently, the article screening process was done based on defined inclusion/exclusion criteria. Following the quality assessment of included studies, two authors performed data extraction. Finally, the extracted data were summarized and presented in form of tables. Forest plots were used to demonstrate the results of the meta-analysis. A review of 8 included studies consisting of 615 patients revealed the significant advantage of the dura-splitting technique in terms of shorter operation duration and hospital stay. The recurrence rate and clinical and radiological outcomes were almost similar between the two surgical techniques. Complication rates were significantly lower in the dura-splitting technique. Dura-splitting can be an effective and safe approach for the management of pediatric Chiari I malformation. However, these results are mostly extracted from observational studies and future randomized controlled trials are recommended.
Keywords	Chiari malformation type I ; dura-splitting ; duraplasty ; outcome ; pediatric
Language	English
Publishing date	2023-05-01
Publisher	Thieme Medical and Scientific Publishers Pvt. Ltd.
Publishing place	Stuttgart ; New York
Document type	Article
ZDB-ID	2621446-5
ISSN	2248-9614 ; 1793-5482 ; 2248-9614
ISSN (online)	2248-9614
ISSN	1793-5482 ; 2248-9614
DOI	10.1055/s-0043-1764324
Database	Thieme publisher's database

Order via subito

Article ; Online: Role of available adjuvant therapies following surgical resection of atypical choroid plexus papilloma-a systematic review and pooled analysis.

Tavallaii, Amin / Keykhosravi, Ehsan / Rezaee, Hamid / Kianbakht, Camellia

Neuro-oncology advances

2020 Volume 2, Issue 1, Page(s) vdaa139

Abstract: Background: Atypical choroid plexus papilloma is a recently introduced entity with intermediate pathological characteristics. These tumors are relatively rare and the optimal management of these tumors is a matter of debate. Therefore, we performed a ... ...

Abstract	Background: Atypical choroid plexus papilloma is a recently introduced entity with intermediate pathological characteristics. These tumors are relatively rare and the optimal management of these tumors is a matter of debate. Therefore, we performed a systematic review and pooled analysis about the effects of adjuvant therapies on outcome measures of these patients. We also compared these effects on totally and partially resected tumors and pediatric and adult populations. Methods: A systematic search of 3 databases based on inclusion/exclusion criteria was performed. Data extraction was separately performed by 2 authors, and the summarized data were presented in the form of tables. Pooled estimates of different outcome measures were calculated for each adjuvant therapy and presented separately for studies with pediatric, adult, or mixed populations. Results: A review of 14 included studies consisting of 144 patients revealed the effect of adjuvant treatment on reduction of tumor recurrence, metastasis, and reoperation rates and increasing survival rates in patients with subtotal tumor resection. This advantage was not seen in the case of gross total tumor resection. Almost all outcome measures were more favorable in the pediatric population. Conclusions: It can be concluded that whenever gross total resection is not feasible, the implementation of adjuvant therapy can improve the outcome and prognosis. In other cases, it should be decided on an individual basis. Also, more aggressive behavior and higher rates of recurrence and mortality in the adult population suggest the consideration of more aggressive adjuvant treatments for adult patients.
Language	English
Publishing date	2020-10-25
Publishing country	England
Document type	Journal Article
ZDB-ID	3009682-0
ISSN	2632-2498 ; 2632-2498
ISSN (online)	2632-2498
ISSN	2632-2498
DOI	10.1093/noajnl/vdaa139
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Acute presentation of papillary glioneuronal tumor due to intra-tumoral hemorrhage in a toddler: an odd presentation of a rare pathology.

Tavallaii, Amin / Keykhosravi, Ehsan / Rezaee, Hamid

British journal of neurosurgery

2020 Volume 37, Issue 3, Page(s) 399–404

Abstract: Background and importance: Papillary glioneuronal tumor is a recently known entity in central nervous system tumors. These benign WHO grade I tumors are mostly seen in young adults. Pediatric PGNT is rare and there is no report of these tumors in ... ...

Abstract	Background and importance: Papillary glioneuronal tumor is a recently known entity in central nervous system tumors. These benign WHO grade I tumors are mostly seen in young adults. Pediatric PGNT is rare and there is no report of these tumors in toddlers. Headache, nausea/vomiting and seizure are most common clinical symptoms. Acute presentation with focal neurological deficits or loss of consciousness are not amongst the expected presentations. These tumors are typically cystic with enhancing mural nodule. Although case with chronic intermittent microhemorrhages are reported in the literature but overt intra-tumoral hemorrhage is an odd radiological presentation with just one reported case in the literature. Clinical presentation: We present an extremely rare case of PGNT presenting with sudden onset hemiparesis and impaired consciousness due to acute intra-tumoral hemorrhage in a toddler which was surgically treated with favorable outcome. Conclusion: PGNTs can also be seen in very young children even in toddlers. Also, it should be kept in mind that these tumors have potential for overt intra-tumoral hemorrhage and acute presentation with focal neurological deficits mimicking more common pathologies which should be considered to plan optimal patient management.
MeSH term(s)	Young Adult ; Humans ; Child ; Child, Preschool ; Brain Neoplasms/pathology ; Magnetic Resonance Imaging ; Neoplasms, Neuroepithelial/pathology ; Central Nervous System Neoplasms ; Radiography
Language	English
Publishing date	2020-08-12
Publishing country	England
Document type	Case Reports ; Journal Article
ZDB-ID	639029-8
ISSN	1360-046X ; 0268-8697
ISSN (online)	1360-046X
ISSN	0268-8697
DOI	10.1080/02688697.2020.1800588
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 2210: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article: A Giant Sacrococcygeal Chordoma: A Case Report.

Keykhosravi, Ehsan / Rezaee, Hamid / Tavallaii, Amin / Tavassoli, Ahmadreza / Maftouh, Mona / Aminzadeh, Behzad

Brain tumor research and treatment

2022 Volume 10, Issue 1, Page(s) 29–33

Abstract: Sacrococcygeal chordoma is a rare malignant bone tumor. Although there are tough membranes such as the periosteum and presacral fascia (which resist transgression by the tumors), chordoma usually invades the rectal wall. The serious problem with these ... ...

Abstract	Sacrococcygeal chordoma is a rare malignant bone tumor. Although there are tough membranes such as the periosteum and presacral fascia (which resist transgression by the tumors), chordoma usually invades the rectal wall. The serious problem with these tumors is the late diagnosis and its high likelihood to become enlarged. The main treatment options for this tumor is surgical resection, radiotherapy, and chemotherapy. Due to the tumor vicinity to important organs such as bladder and its neurovascular structures, it makes surgical excision extremely challenging. The aim of this study is to describe a 50-year-old man with a giant sacrococcygeal mass. The novelty of this case report is the huge and unique size of the tumor which has not reported previously as well the special surgical approaches performed to remove the tumor.
Language	English
Publishing date	2022-02-03
Publishing country	Korea (South)
Document type	Case Reports
ZDB-ID	3018737-0
ISSN	2288-2413 ; 2288-2405
ISSN (online)	2288-2413
ISSN	2288-2405
DOI	10.14791/btrt.2022.10.e12
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Infantile Spasms, Clinical Manifestations of a Rare Brain Tumor: A Case Report and Literature Review.

Hosseinzadeh, Rezvan / Tavallaii, Amin / Keykhosravi, Ehsan / Behnamfar, Morteza / Banaei, Mahnaz / Babaei, Meisam

Iranian journal of child neurology

2022 Volume 16, Issue 2, Page(s) 161–166

Abstract: Desmoplastic infantile ganglioglioma (DIG) has a favorable prognosis and is classified as a benign infantile brain tumor. The DIG is more common in children under 2 years of age than in other age groups. This report introduces a 5.5 month-old infant who ... ...

Abstract	Desmoplastic infantile ganglioglioma (DIG) has a favorable prognosis and is classified as a benign infantile brain tumor. The DIG is more common in children under 2 years of age than in other age groups. This report introduces a 5.5 month-old infant who was referred with infantile spasms and diagnosed with a brain tumor. Brain magnetic resonance imaging showed a large heterogeneous mass in the right hemisphere with shifting to the other side. The patient underwent surgery. The extra-axial mass was completely resected, and the diagnosis of DIG grade I was confirmed by pathology. After one year, patient development was normal, and the seizures did not recur. In addition, the general condition was good. With a brief review and search in the literature, 13 case reports were identified 9 of which were male cases. The mean age of initial manifestation to final tumor diagnosis was 4 months. Out of 13 patients, 8 cases were reported with the mass origin in the right hemisphere. The most commonly observed tumors were glioma (n=4) and hypothalamic hamartoma (n=3). Except for three patients who died, the remaining had a complete recovery after tumor removal with a seizure-free interval at follow-up.
Language	English
Publishing date	2022-03-14
Publishing country	Iran
Document type	Case Reports
ZDB-ID	2542305-8
ISSN	2008-0700 ; 1735-4668
ISSN (online)	2008-0700
ISSN	1735-4668
DOI	10.22037/ijcn.v16i4.34911
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Functional Outcome and Mortality Predictors in Patients with Cerebral Ischemic Infarction After Decompressive Craniectomy: Cross-Sectional Study.

Rostami, Amin / Elyassirad, Daniel / Vatanparast, Mahsa / Abouei Mehrizi, Mohammad Ali / Hasanpour, Mohammad / Rezaee, Hamid / Haghir, Amirhosein / Keykhosravi, Ehsan

World neurosurgery

2023 Volume 182, Page(s) e847–e853

Abstract: Objective: Surgeons commonly perform Decompressive craniectomy (DC) to manage patients with cerebral ischemic infarction. However, there are conflicting data on the long-term functional outcomes following DC. Therefore, this study aims to determine the ... ...

Abstract	Objective: Surgeons commonly perform Decompressive craniectomy (DC) to manage patients with cerebral ischemic infarction. However, there are conflicting data on the long-term functional outcomes following DC. Therefore, this study aims to determine the functional outcome of patients with cerebral ischemic infarction after DC. Methods: This prospective and retrospective cross-sectional study included 148 patients with cerebral ischemic infarction who underwent DC at Ghaem Hospital, Mashhad, Iran, from March 2011 to March 2021. The Modified Rankin Scale (mRS) assesses disability in these patients and determines the recovery and degree of long-term functional outcomes. Demographic and clinical data were extracted and recorded in a researcher-made questionnaire. Results: In summary, the follow-up revealed a survival rate of 39.2% among patients with ischemic stroke. The comparison of the mean infarct volume in patients with various mRS scores showed that the mean infarct volume was significantly higher in patients with unfavorable functional outcomes, based on mRS scores at discharge (P = 0.05), 3 months mRS (P < 0.01), and mRS score at final follow-up (P = 0.01). Final mortality was higher in patients with higher mRS scores at discharge, after 3 months, and final follow-up (P < 0.01). Older age and infarction volume can predict mRS and mortality in patients with ischemic stroke (P < 0.01). Conclusions: The present study showed that mortality and mRS scores at various times are associated with infarction volume and older age in patients with ischemic stroke.
MeSH term(s)	Humans ; Treatment Outcome ; Cross-Sectional Studies ; Decompressive Craniectomy ; Infarction, Middle Cerebral Artery/surgery ; Retrospective Studies ; Prospective Studies ; Ischemic Stroke/surgery
Language	English
Publishing date	2023-12-13
Publishing country	United States
Document type	Journal Article
ZDB-ID	2534351-8
ISSN	1878-8769 ; 1878-8750
ISSN (online)	1878-8769
ISSN	1878-8750
DOI	10.1016/j.wneu.2023.12.058
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 1159: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

To top

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito