Ashraf Yassin Amer - Academia.edu (original) (raw)
Papers by Ashraf Yassin Amer
The Medical Journal of Cairo University, Sep 1, 2018
Background: Scaphoid non-unions pose a great challenge to surgeons because of the multiple factor... more Background: Scaphoid non-unions pose a great challenge to surgeons because of the multiple factors that may contribute to their causation. The etiology of the nonunion may be because of anatomic variations, fracture configuration, vascular problems, underlying metabolic problems, or the inadequacy of initial treatment. Percutaneous management of scaphoid non-unions offers the advantage of inducing minimal trauma to the soft tissues while adequately stabilizing the fracture site to induce union in a high percentage of cases. This study proves that percutaneous fixation of delayed or nonunited scaphoid fractures result in predictable satisfactory union rate and functional outcome, it proves that percutaneous Herbert's screw insertion carries no risk of damage to soft tissues or vascular supply. Also, the gap is not the determinant of time to union but actually it is the time since injury; the longer the time since injury the longer the time to union as long as the scaphoid alignment is maintained i.e. no humpback deformity.
Journal of Clinical Neuroscience, 2012
The purpose of this study was to assess the clinical and radiological outcomes of minimally invas... more The purpose of this study was to assess the clinical and radiological outcomes of minimally invasive transforaminal lumbar interbody fusion (MI-TLIF) surgery for lumbar spondylolisthesis. A prospective analysis was conducted of 23 consecutive patients with grade I or grade II lumbar spondylolisthesis who underwent a MI-TLIF using image guidance between August 2008 and September 2010. The patient group comprised 13 males and 10 females (mean age 57 years), 22 of whom underwent single level fusion and one patient with a two level fusion. All patients underwent postoperative CT scans to assess pedicle screw and cage placement and fusion at six months. The Oswestry Disability Index (ODI) scores were recorded preoperatively and at the six-month follow-up. We found that 22 of 23 (95.7%) patients showed evidence of fusion at six months with a mean improvement of 26.7 on ODI scores. The mean length of hospital stay was four days. The mean operative time was 172 minutes. Anatomical reduction of the spondylolisthesis was complete in 16 patients and incomplete in seven. Regarding complications, we observed: one of 94 (1.1%) pedicle screws misplaced, which did not require revision postoperatively; one of 23 patients (4.3%) with a pulmonary embolism and one of 23 (4.3%) patients with transient nerve root pain. There were no occurrences of infection and no postoperative cerebrospinal fluid leaks. We conclude that MI-TLIF offers patients a safe and effective surgical option for lumbar spondylolisthesis treatment. Furthermore, it may offer patients additional advantages in terms of postoperative pain and recovery.
This study assesses the difference between Minimally Invasive Transforaminal Lumbar Interbody Fus... more This study assesses the difference between Minimally Invasive Transforaminal Lumbar Interbody Fusion (MI-TLIF) surgery and conventional open TLIF surgery incases of lytic spondylolisthesis regarding pain, disability, hospital stay and complications. Lytic Spondylolisthesis patients may require fusion of one or more spinal segments. The chances of achieving a successful lumbar spinal fusion have increased. TLIF technique is gradually being accepted in these cases and widely used by most spinesurgeons. Minimally invasive TLIF is a recent trend for spinal fusion. This is a prospective randomized comparative study conducted from March 2016 to December 2018 that included 40 patients with low grade lytic spondylolisthesis who underwent TLIF. 20 patients underwent MI-TLIF through percutaneous posterior lumbar pedicular screw fixation, microscopic minimally invasive transform aminal discectomy and interbody cage fusion (patients group A) and another 20 patients underwent conventional open p...
International Journal of Neurosurgery, 2020
This study aims to assess the difference between minimal invasive TLIF surgery and conventional T... more This study aims to assess the difference between minimal invasive TLIF surgery and conventional TLIF surgery in cases of lytic spondylolisthesis, as regards pain, disability, hospital stay and complications. Lytic Spondylolisthesis patients may require fusion of one or more spinal segments to treat their condition adequately. The chances of achieving a successful lumbar spinal fusion has increased. TLIF technique is gradually being accepted in these cases and widely used by most spine surgeons. Minimal invasive TLIF is a recent trend for spinal fusion. This is a prospective randomized comparative study conducted from March 2016 to December 2018 included forty patients with low grade lytic spondylolisthesis that underwent surgeries. Twenty patients underwent MI-TLIF through percutaneous posterior lumbar pedicular screw fixation, microscopic minimally invasive transformational discectomy and interbody cage fusion (patients group "A") and another twenty patients underwent traditional open posterior lumbar pedicular screw fixation and TLIF (control group "B"). In our results, both surgical techniques showed improvement in pain and function within 12 months (follow up period), but group A showed statistically significant improvement in pain and function in the 1 st three months. Regarding blood loss, need for transfusion and hospital stay, group A showed statistically significant better results. As a conclusion, minimally invasive TLIF is a better option in surgical management of spondylolisthesis especially in the early postoperative period.
The Medical Journal of Cairo University, Sep 1, 2018
Background: Scaphoid non-unions pose a great challenge to surgeons because of the multiple factor... more Background: Scaphoid non-unions pose a great challenge to surgeons because of the multiple factors that may contribute to their causation. The etiology of the nonunion may be because of anatomic variations, fracture configuration, vascular problems, underlying metabolic problems, or the inadequacy of initial treatment. Percutaneous management of scaphoid non-unions offers the advantage of inducing minimal trauma to the soft tissues while adequately stabilizing the fracture site to induce union in a high percentage of cases. This study proves that percutaneous fixation of delayed or nonunited scaphoid fractures result in predictable satisfactory union rate and functional outcome, it proves that percutaneous Herbert's screw insertion carries no risk of damage to soft tissues or vascular supply. Also, the gap is not the determinant of time to union but actually it is the time since injury; the longer the time since injury the longer the time to union as long as the scaphoid alignment is maintained i.e. no humpback deformity.
Journal of Clinical Neuroscience, 2012
The purpose of this study was to assess the clinical and radiological outcomes of minimally invas... more The purpose of this study was to assess the clinical and radiological outcomes of minimally invasive transforaminal lumbar interbody fusion (MI-TLIF) surgery for lumbar spondylolisthesis. A prospective analysis was conducted of 23 consecutive patients with grade I or grade II lumbar spondylolisthesis who underwent a MI-TLIF using image guidance between August 2008 and September 2010. The patient group comprised 13 males and 10 females (mean age 57 years), 22 of whom underwent single level fusion and one patient with a two level fusion. All patients underwent postoperative CT scans to assess pedicle screw and cage placement and fusion at six months. The Oswestry Disability Index (ODI) scores were recorded preoperatively and at the six-month follow-up. We found that 22 of 23 (95.7%) patients showed evidence of fusion at six months with a mean improvement of 26.7 on ODI scores. The mean length of hospital stay was four days. The mean operative time was 172 minutes. Anatomical reduction of the spondylolisthesis was complete in 16 patients and incomplete in seven. Regarding complications, we observed: one of 94 (1.1%) pedicle screws misplaced, which did not require revision postoperatively; one of 23 patients (4.3%) with a pulmonary embolism and one of 23 (4.3%) patients with transient nerve root pain. There were no occurrences of infection and no postoperative cerebrospinal fluid leaks. We conclude that MI-TLIF offers patients a safe and effective surgical option for lumbar spondylolisthesis treatment. Furthermore, it may offer patients additional advantages in terms of postoperative pain and recovery.
This study assesses the difference between Minimally Invasive Transforaminal Lumbar Interbody Fus... more This study assesses the difference between Minimally Invasive Transforaminal Lumbar Interbody Fusion (MI-TLIF) surgery and conventional open TLIF surgery incases of lytic spondylolisthesis regarding pain, disability, hospital stay and complications. Lytic Spondylolisthesis patients may require fusion of one or more spinal segments. The chances of achieving a successful lumbar spinal fusion have increased. TLIF technique is gradually being accepted in these cases and widely used by most spinesurgeons. Minimally invasive TLIF is a recent trend for spinal fusion. This is a prospective randomized comparative study conducted from March 2016 to December 2018 that included 40 patients with low grade lytic spondylolisthesis who underwent TLIF. 20 patients underwent MI-TLIF through percutaneous posterior lumbar pedicular screw fixation, microscopic minimally invasive transform aminal discectomy and interbody cage fusion (patients group A) and another 20 patients underwent conventional open p...
International Journal of Neurosurgery, 2020
This study aims to assess the difference between minimal invasive TLIF surgery and conventional T... more This study aims to assess the difference between minimal invasive TLIF surgery and conventional TLIF surgery in cases of lytic spondylolisthesis, as regards pain, disability, hospital stay and complications. Lytic Spondylolisthesis patients may require fusion of one or more spinal segments to treat their condition adequately. The chances of achieving a successful lumbar spinal fusion has increased. TLIF technique is gradually being accepted in these cases and widely used by most spine surgeons. Minimal invasive TLIF is a recent trend for spinal fusion. This is a prospective randomized comparative study conducted from March 2016 to December 2018 included forty patients with low grade lytic spondylolisthesis that underwent surgeries. Twenty patients underwent MI-TLIF through percutaneous posterior lumbar pedicular screw fixation, microscopic minimally invasive transformational discectomy and interbody cage fusion (patients group "A") and another twenty patients underwent traditional open posterior lumbar pedicular screw fixation and TLIF (control group "B"). In our results, both surgical techniques showed improvement in pain and function within 12 months (follow up period), but group A showed statistically significant improvement in pain and function in the 1 st three months. Regarding blood loss, need for transfusion and hospital stay, group A showed statistically significant better results. As a conclusion, minimally invasive TLIF is a better option in surgical management of spondylolisthesis especially in the early postoperative period.