Johannes Hendrik Davis

Johannes Hendrik Davis
Stellenbosch University | SUN · Division of Orthopaedic Surgery

MBChB; MMed; FC Orth

About

22
Publications
2,587
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114
Citations
Introduction
Johannes Hendrik Davis currently works at the Division of Orthopaedic Surgery, Stellenbosch University as well as the Institute of Orthopaedics and Rheumatology, in Stellenbosch South Africa. Johannes does research in Infectious Diseases, and Orthopedic Spinal Surgery. Their most recent publication is 'Closed traction reduction of cervical spine facet dislocations: Compelled by law'.

Publications

Publications (22)
Article
Full-text available
Purpose To investigate variation in treatment decisions among spine surgeons in South Africa and the association between surgeon characteristics and the treatment they select. Methods We surveyed 79 South African spine surgeons. We presented four vignettes (cervical spine distractive flexion injury, lumbar disc herniation, degenerative spondylolis...
Article
Full-text available
BACKGROUND: Thirty-day readmission rate and 30-day reoperation rate are recognised indicators of perioperative quality of care. While these indicators have been reported in numerous studies from developed countries, little is known about readmission and reoperation following spinal surgery in South Africa. The main aim of this study was to describe...
Conference Paper
Background Spinal tuberculosis (TB) is a potentially severe form of TB that accounts for 50% of all musculoskeletal TB cases. The condition presents with non-specific symptoms often resulting in delayed diagnosis. Therefore, there is an urgent need for new tools that can aid early diagnosis. Host transcriptomic biosignatures have shown promise in t...
Article
Full-text available
Background It is generally understood that the profile of spine surgery varies by setting, based on factors such as the age profile of the population, the economic context and access to healthcare. Relatively little is known about the profile of spine surgery in South Africa, although one previous report from the public healthcare sector suggested...
Article
Full-text available
Purpose Studies from developed countries suggest a dramatic increase in the utilization of spine surgery in recent decades, however less is known about spine surgery rates in the developing world. The aim of this study was to investigate ten-year trends in the incidence of spine surgery within South Africa’s largest open medical scheme. Methods Th...
Article
Full-text available
Culture remains the gold standard to diagnose spinal tuberculosis (STB) despite the paucibacillary nature of the disease. Current methods can take up to 42 days to yield a result, delaying the ability to rapidly detect drug resistance. Studies have demonstrated the use of supplementation with culture filtrate (CF) from an axenic culture of Mycobact...
Article
Full-text available
Background: Severe kyphotic deformity in young children may have devastating outcomes when neglected.Halo-pelvic traction has been shown to be very effective as part of the treatment for severe kyphosis, but little is known about application of this technique in very young individuals. The aim of this case series was to provide novel insights int...
Article
Background Monitoring treatment response is an important precaution in spinal tuberculosis (TB), particularly when the condition was clinically diagnosed rather than bacteriologically confirmed and when drug susceptibility testing was not performed. Conventional monitoring measures have limitations and there is a need for favourable alternatives. T...
Article
Full-text available
Introduction: children with spinal tuberculosis (TB) are at risk of kyphotic deformity both during and after the active phase of the disease. Management guidelines include follow-up until skeletal maturity. Little is known about adherence to this recommendation. This study aimed to investigate loss to long-term spine clinic follow-up (LTFU) among...
Article
Full-text available
Background Spinal tuberculosis (TB) may have a variable, non-specific presentation including back pain with- or without- constitutional symptoms. Further tools are needed to aid early diagnosis of this potentially severe form of TB and immunological biomarkers may show potential in this regard. The aim of this study was to investigate the utility o...
Article
Objectives 18F-Fluorodeoxyglucose (FDG) Positron Emission Tomography- Computed Tomography (PET/CT) scans can be used to assess healing following treatment for spinal tuberculosis (TB) but have limited accessibility and high cost. This study investigated the association between immune biomarkers and FDG-PET/CT activity after ≥9 months of treatment f...
Article
Full-text available
Background: Patients diagnosed with spinal tuberculosis (TB) at a major tertiary hospital in Western Cape Province, South Africa, are required to attend regular follow-up at the hospital’s outpatient spine clinic and to remain on TB treatment for at least 9 months. This follow-up and lengthy treatment is intended to allow for specialist monitoring...
Article
Full-text available
Aims: The aim of the study was to investigate the differences in participant characteristics between positive and negative, positron emission tomography with 2-deoxy-2-[fluorine-18]fluoro-D-glucose integrated with computed tomography (18F-FDG PET/CT) activity at the spinal tuberculosis (TB) site following 12 months of the appropriate chemotherapy t...
Article
Full-text available
RESEARCH The urgency of closed reduction of acute low-velocity cervical facet dislocations has recently been highlighted by the Constitutional Court of South Africa (SA), following a permanent spinal cord injury that a young rugby player sustained during a club-level match. The court found that if emergency care of the complainant had resulted in r...
Article
Full-text available
Aim: The first aim was to investigate the overall burden and clinical profile of spinal pathology presenting to the Tygerberg Hospital Spinal Unit over a one-year period. The second aim was to determine resource use associated with spine pathology admissions. Methods: Overall burden was investigated by performing a retrospective review of all patie...
Article
The aim of this retrospective review was to assess the overall burden and trend in spinal tuberculosis (TB) at tertiary hospitals in the Western Cape Province of South Africa. All spinal TB cases seen at the province's three tertiary hospitals between 2012 and 2015 were identified and clinical records of each case assessed. Cases were subsequently...
Article
Full-text available
BACKGROUND: The escalating global pandemic of tuberculosis infections results in 8 million new cases diagnosed each year. The thoracic and thoracolumbar spine is the most prevalent area involved in musculoskeletal tuberculosis. Deformity with associated neurological compromise, requiring extended in-patient treatment and rehabilitation, is common....
Article
Full-text available
Background: Current recommendations for spinal tuberculosis (TB) not requiring open surgery include core needle biopsy to confirm TB and determine drug sensitivity. International figures show the positive culture yield from core needle biopsies is 50 -- 83%.Objectives. To (i) assess the yield of percutaneous needle biopsies; (ii) identify factors...
Article
Full-text available
STUDY DESIGN: Retrospective study of 31 patients treated for adolescent idiopathic scoliosis utilising posterior double rod constructs with a limited number of strategically placed screws. OBJECTIVE: Review of the radiological and clinical outcomes of strategic screw placement in posterior double rod constructs with respect to implant density. SUMM...
Article
Full-text available
Primary spinal tumours make up 11% of primary musculoskeletal tumours, and 4.2% of spinal tumours.1 Six per cent of these spinal tumours are to be considered malignant.2 The intrinsic rarity of these tumours therefore make it very difficult for a single spinal surgeon to amass a large enough number of surgical cases to string together a valid and w...
Article
Full-text available
This article reports on the radiographic outcome of unstable thoracolumbar fractures managed with short segment posterior instrumentation as standalone treatment. Short segment posterior instrumentation is the method of choice for unstable thoracolumbar injuries in our unit. It is considered to be adequate treatment in cases with an intact posterio...

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