1/17. The importance of an intact abdominal musculature mechanism in maintaining spinal sagittal balance. Case illustration in prune-belly syndrome.STUDY DESIGN: A rare case of thoracic hypokyphotic deformity secondary to prune-belly syndrome is presented. OBJECTIVES: To discuss the role of an intact abdominal musculature mechanism in maintaining spinal sagittal balance, and to present a case illustration of prune-belly syndrome. SUMMARY OF BACKGROUND DATA: There has been an ongoing debate concerning the integrity of the abdominal musculature unit in maintaining spinal support and stability. It is now believed that intra-abdominal pressure hitherto generated plays an important role in the stabilization of the spine. Congenital aplasia of the abdominal musculature, termed prune-belly syndrome, might therefore result in the loss of spinal function and stability. The literature also is reviewed for the incidence of spinal deformities related to this condition. methods: A unique case of prune-belly syndrome in a 33-year-old man with congenital aplasia of the abdominal musculature is presented. RESULTS: The patient exhibited loss of the spinal sagittal balance, with resultant development of a thoracic hypokyphotic deformity and thoracolumbar scoliosis. CONCLUSIONS: scoliosis appears to be the most commonly reported spinal deformity. Unequal compressive forces on the vertebral endplates may be the proposed mechanism for the spinal deformities. Compensatory lumbar paraspinal overactivity resulting from the inability to generate normal intra-abdominal pressures because of a deficient abdominal wall musculature mechanism seems to be the plausible explanation for the observed thoracic hypokyphatic deformity.- - - - - - - - - - ranking = 1keywords = pressure (Clic here for more details about this article) |
2/17. Cor pulmonale presenting in a patient with congenital kyphoscoliosis following intercontinental air travel.We present the case of a 59-year-old man with congenital kyphoscoliosis who developed cor pulmonale for the first time following intercontinental air travel. Prolonged exposure to the low partial pressure of oxygen in the cabin of the aircraft led to pulmonary hypertension and right heart failure. The case highlights the potential for long-haul air travel to cause decompensation in patients with thoracic deformity and apparently stable cardiorespiratory function. It also emphasises the need for patients and their medical attendants to carefully consider the potential health implications of the hypoxic atmosphere in pressurised aircraft.- - - - - - - - - - ranking = 0.5keywords = pressure (Clic here for more details about this article) |
3/17. Facial pressure sore complicated by mandibular osteomyelitis.A case is reported of an 85-year-old woman with mandibular osteomyelitis secondary to a submental pressure sore. The main aetiological factors in the development of the pressure sore were dementia and severe senile kyphosis. Pressure sores are rare in the head and neck region and, though osteomyelitis is a common complication at other anatomical sites, it has not been previously reported in the mandible.- - - - - - - - - - ranking = 3keywords = pressure (Clic here for more details about this article) |
4/17. Multicore myopathy: respiratory failure and paraspinal muscle contractures are important complications.Three ambulant males with multicore myopathy, a rare congenital myopathy, are reported with nocturnal hypoventilation progressing to respiratory failure at the age of 9, 13, and 21 years. Deterioration in these individuals occurred over several months without any precipitating event. patients had clinical evidence of nocturnal hypoventilation with hypoxaemia and hypercapnia. Forced vital capacity was significantly reduced (20 to 43% of predicted level). These parameters improved on institution of overnight ventilation using a BiPAP pressure support ventilator with face mask or nasal pillows with O2 saturation maintained above 90% overnight and an increase in forced vital capacity by as much as 100% (0.3 to 0.6 litres). This was matched by a symptomatic and functional improvement. Also present in these patients and not previously reported is the association of multicore myopathy with paraspinal contractures which produce a characteristic scoliosis described as a 'side-sliding' spine. This may be improved by spinal bracing or surgery.- - - - - - - - - - ranking = 0.5keywords = pressure (Clic here for more details about this article) |
5/17. Orthodeoxia and platypnea secondary to a patent foramen ovale despite normal right-sided cardiac pressures.Numerous cases of orthodeoxia and platypnea have been reported. Some have been found to be due to intracardiac shunts despite normal intracardiac pressures. In the case presented, a 79-year-old woman was noted to have orthodeoxia and platypnea secondary to a patent foramen ovale (PFO) despite normal intracardiac pressures. She recovered after closure of the PFO. The authors postulate that recent vertebral fractures and subsequent kyphosis, as well as a dilated thoracic aorta, altered intrathoracic relationships and may have led to a stream of venous return being directed across the PFO in the upright position, despite normal intracardiac pressures.- - - - - - - - - - ranking = 3.5keywords = pressure (Clic here for more details about this article) |
6/17. spinal cord injury in children.The spinal injured child has speical needs owing to the processes of physical, mental and social growth. goals of physical treatment programs include prevention of: genitourinary complications; contractures; pressure sores; long bone fractures, hip subluxation and dislocation; spinal deformity. Nonoperative treatment of spinal deformity employing external support should be initiated when the potential for spinal deformity exists. External support delays the development of spinal deformity, improves sitting balance and allows free upper extremity use. The overall treatment programs must consider altered body proportions, immaturity of strength and coordination. Case examples of children with spinal injury are presented above to illustrate specific problems stemming from immaturity of physical, cognitive, and social development. Spinal surgery can be a conservative measure in the growing child when there is radiologic evidence of progressive spinal deformity. Posterior spinal fusion with Harrington instrumentation and external support permits immediate return to vertical activity.- - - - - - - - - - ranking = 0.5keywords = pressure (Clic here for more details about this article) |
7/17. Management of respiratory deterioration in a pregnant patient with severe kyphoscoliosis by non-invasive positive pressure ventilation.The problem of kyphoscoliosis in combination with pregnancy is uncommon and published cases are rare. Until now, little and controversial information on the outcome, optimal management and course of pregnancy in patients with kyphoscoliosis has been available. The majority of maternal deaths seem to be attributed to cardiorespiratory failure, while obstetric complications account for relatively few complications. We present the case of a 34-year old pregnant woman with congenital kyphoscoliosis and a forced vital capacity (FVC) of about one liter. A further deterioration of lung function was expected. In fact, severe limitations in exercise capacity (bed rest), fatigue and hypersomnolence, as well as a severe increase in pulmonary hypertension occurred during the second and third trimester. Nasal intermittent positive pressure ventilation (NIP-PV) with bilevel positive airway pressure (BiPAP) was started in the 20th week of gestation and adapted throughout pregnancy. Nasal BiPAP was well-tolerated and corrected exercise tolerance, fatigue and nocturnal oxygen desaturations. At 32 weeks of gestation, the patient was admitted for an elective Caesarean section under combined spinal-epidural anaesthesia with ongoing NIPPV, and delivered a healthy baby. Home nocturnal ventilatory support was continued as nocturnal episodic desaturations were also assessed during the postpartum period. At time of discharge, the patient's exercise capacity and lung function were nearly equal to levels before pregnancy. We conclude that pregnancy in selected kyphoscoliotic patients with severe limitations in lung function is relatively safe for both the mother and the child when NIPPV is used for overcoming respiratory deterioration and for preventing further cardiorespiratory failure.- - - - - - - - - - ranking = 3keywords = pressure (Clic here for more details about this article) |
8/17. hypotension-induced loss of intraoperative monitoring data during surgical correction of scheuermann kyphosis: a case report.STUDY DESIGN: Presentation of a case report of Scheuermann kyphosis surgical correction. OBJECTIVE: To describe a scenario where both neurogenic mixed evoked potentials and somatosensory-evoked potentials were lost due solely to hypotension before any correction of a kyphotic spinal deformity was performed. SUMMARY OF BACKGROUND DATA: Multimodality intraoperative neurophysiologic monitoring of the spinal cord has become widely utilized during surgical correction of scoliotic and kyphotic deformities. Most spinal surgeries also benefit from a state of hypotension to minimize blood loss, but unchecked and persistent hypotension may lead to inadequate perfusion to the spinal cord, resulting in spinal cord dysfunction noted by diminution of neuromonitoring data. methods: An 18-year-old boy with a 95 degrees Scheuermann kyphosis underwent a posterior spinal fusion for correction of his deformity. Intraoperative neurophysiologic monitoring consisting of neurogenic mixed evoked potentials and somatosensory-evoked potentials were performed throughout surgery. RESULTS: After placement of segmental pedicle screw fixation points and multiple osteotomies, before any instrumented correction of the deformity, all lower extremity neuromonitoring data were acutely lost. The surgeon was immediately warned of the data loss, with the mean arterial pressure noted to be 50 mm Hg. The mean arterial pressure was raised with the use of epinephrine bolus and dopamine infusion. Subsequently, all lower extremity neuromonitoring data returned. A Stagnara wake-up test was performed, which the patient passed, and the surgical correction was performed with his pressure maintained on a dopamine infusion. He awakened without neurologic deficits and had an uneventful recovery. CONCLUSIONS: Although a state of mild hypotension may be beneficial to limit blood loss during spinal deformity corrective surgery, acute and/or prolonged hypotension may jeopardize spinal cord vascularity and should be avoided especially during surgical treatment of high-risk deformities such as kyphosis. Early warning by multimodality physiologic neuromonitoring appears to be a useful method to alert surgeons of the potentially devastating problem of hypotension-induced spinal cord dysfunction and allows immediate corrective actions.- - - - - - - - - - ranking = 1.5keywords = pressure (Clic here for more details about this article) |
9/17. Anterior spinal decompression and fusion for cervical flexion myelopathy in young patients.OBJECT: The mechanism underlying cervical flexion myelopathy (CFM) is unclear. The authors report the results of anterior decompression and fusion (ADF) in terms of neurological status and radiographically documented status in young patients and discuss the pathophysiological mechanism of the entity. methods: Twelve patients underwent ADF in which autogenous iliac bone graft was placed. The fusion area was one segment in four cases, two segments in seven, and three segments in one. Neurological status, as determined by the Japanese Orthopaedic association (JOA) score, radiographic findings, and intraoperative findings were evaluated. The mean follow-up period was 63.3 months (range 20-180 months). Grip strength was significantly improved and sensory disturbances resolved completely. Intrinsic muscle atrophy, however, persisted in all patients at the final follow-up examination. Local kyphosis in the flexed-neck position at the fusion levels was corrected by surgery. Preoperative computerized tomography myelography revealed that the cord compression index, which was calculated by anteroposterior and transverse diameters of the spinal cord, decreased to 33 /- 6.2% in the flexed-neck position from 39.7 /- 9.9% in the extended-neck position. The anterior dura mater-spinal cord distance decreased to 1.9 /- 0.7 mm in the flexed-neck position from 4 /- 1.2 mm in extended-neck position. The posterior dura mater-spinal cord distance increased to 2.5 /- 1.1 mm in the flexed-neck position from 1.3 /- 0.5 mm in the extended-neck position. CONCLUSIONS: Postoperative neurological status was improved in terms of grip strength, sensory disturbance, and JOA score, and local kyphosis in the flexed-neck position at the fusion levels was reduced and stabilized by ADF. In most cases local kyphosis in the flexed-neck position was demonstrated at the corresponding disc level, as were cervical cord compression and decrease of the anterior wall of the dura mater-spinal cord distance in the flexed-neck position. Therefore, the contact pressure between the spinal cord and anterior structures (intact vertebral bodies and intervertebral discs) in the mobile and kyphotic segments was considered to contribute to the onset of CFM. The ADF-related improvement of the clinical symptoms, preventing kyphotic alignment in flexion and decreasing movement of the cervical spine, supports the idea of a contact pressure mechanism. Furthermore, short ADF performed only at the corresponding segments can preserve more mobile segments compared with posterior fusion. Thus, ADF should be the first choice in the treatment of CFM.- - - - - - - - - - ranking = 1keywords = pressure (Clic here for more details about this article) |
10/17. Acute airway obstruction, hypertension and kyphoscoliosis.An elderly woman developed acute respiratory obstruction after choking on a bolus of food. On rigid bronchoscopy no foreign body, or anatomical obstruction was seen, but airway obstruction recurred during emergence from general anaesthesia, and was thought to be functional in nature. A recurring airway obstruction followed, relieved by induction of anaesthesia and by sedation. This was subsequently demonstrated to be caused by a tortuous aorta which impinged intermittently on the anterior tracheal wall, as a result of kyphoscoliosis of the thoracic spine. We attribute the relief of airway obstruction by general anaesthesia to a reduction in arterial blood pressure.- - - - - - - - - - ranking = 0.5keywords = pressure (Clic here for more details about this article) |
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