Pregnancy and autonomic hyperreflexia in patients with spinal cord lesions

Successful pregnancy in a woman with paraplegia

Pregnancy is a rare occurrence in patients suffering from spinal cord injury (SCI). Pregnancy in these patients presents unique challenges to obstetric care providers, who need to become familiar with the general principles of care in this setting. SCI alters the function of multiple organ systems and chronic medical conditions are common in this patient population. Certain medical complications such as urinary tract infections and autonomic hyper-reflexia, or autonomic dysreflexia, are expectable and can be managed successfully. A multidisciplinary team should care for delivery in these patients. The authors present a case of a pregnancy in a paraplegic woman whose lesion was at the level of T4. She received epidural analgesia and had a caesarian section. From this case, the authors aim to point out the specific concerns of the management of pregnancy and delivery in this setting emphasising the importance of a multidisciplinary team, specially obstetricians and anaesthetists.

Transection of the pelvic or vagus nerve forestalls ripening of the cervix and delays birth in rats

Innervation of the cervix is important for normal timing of birth because transection of the pelvic nerve forestalls birth and causes dystocia. To discover whether transection of the parasympathetic innervation of the cervix affects cervical ripening in the process of parturition was the objective of the present study. Rats on Day 16 of pregnancy had the pelvic nerve (PnX) or the vagus nerve (VnX) or both pathways (PnX+VnX) transected, sham-operated (Sham) or nonpregnant rats served as controls. Sections of fixed peripartum cervix were stained for collagen or processed by immunohistochemistry to identify macrophages and nerve fibers. All Sham controls delivered by the morning of Day 22 postbreeding, while births were delayed in more than 75% of neurectomized rats by more than 12 h. Dystocia was evident in more than 25% of the PnX and PnX+VnX rats. Moreover, on prepartum Day 21, serum progesterone was increased severalfold in neurectomized versus Sham rats. Assessments of cell nuclei counts indicated that the cervix of neurectomized rats and Sham controls had become equally hypertrophied compared to the unripe cervix in nonpregnant rats. Collagen content and structure were reduced in the cervix of all pregnant rats, whether neurectomized or Shams, versus that in nonpregnant rats. Stereological analysis of cervix sections found reduced numbers of resident macrophages in prepartum PnX and PnX+VnX rats on Day 21 postbreeding, as well as in VnX rats on Day 22 postbreeding compared to that in Sham controls. Finally, nerve transections blocked the prepartum increase in innervation that occurred in Sham rats on Day 21 postbreeding. These findings indicate that parasympathetic innervation of the cervix mediates local inflammatory processes, withdrawal of progesterone in circulation, and the normal timing of birth. Therefore, pelvic and vagal nerves regulate macrophage immigration and nerve fiber density but may not be involved in final remodeling of the extracellular matrix in the prepartum cervix. These findings support the contention that immigration of immune cells and enhanced innervation are involved in processes that remodel the cervix and time parturition.

Transurethral Sphincterotomy Provides Significant Relief in Autonomic Dysreflexia in Spinal Cord Injured Male Patients: Long-Term Followup Results

PURPOSE

An evaluation of the results of transurethral sphincterotomy in spinal cord injured patients for the relief of autonomic dysreflexia is presented.

MATERIALS AND METHODS

The study describes experience with the treatment of 46 consecutive spinal cord injured males presenting with frequent symptoms of autonomic dysreflexia and inadequate voiding. The selection criteria include patients injured above the thoracic 6 level with subjective symptoms of autonomic dysreflexia who did not want to be catheterized or were unable to perform intermittent catheterization. Patients were studied with complex urodynamics before and at least 3 months after undergoing transurethral sphincterotomy. During cystometrogram the maximum increase in systolic and diastolic blood pressure was recorded. After transurethral sphincterotomy patients were followed for a mean of 5.4+/-3.1 years (range 1 to 12).

RESULTS

There was subjective relief in autonomic dysreflexia following transurethral sphincterotomy in all patients, which correlated well with a significant decrease in systolic and diastolic blood pressure (p<0.0001). Mean decrease in maximal systolic and diastolic blood pressure after transurethral sphincterotomy was 55+/-25 and 29+/-17 mm Hg, respectively. Mean post-void residual urine decreased significantly from 233+/-151 to 136+/-0.34 ml after transurethral sphincterotomy. However, there was no significant change in mean maximum voiding pressures.

CONCLUSIONS

Blood pressure monitoring during cystometrogram provides an objective assessment of the presence of autonomic dysreflexia due to neurogenic bladder dysfunction, enabling better therapeutic management to control autonomic dysreflexia. Persistence of significant autonomic dysreflexia needs urodynamic evaluation if other factors for autonomic dysreflexia have been excluded.

Labor analgesia for the parturient with neurological disease: what does an obstetrician need to know?

Several neurological disorders including multiple sclerosis, myasthenia gravis, epilepsy, spinal cord injury, and subarachnoid hemorrhage are encountered with increasing frequency in pregnant women worldwide. Although there is absence of uniform anesthetic guidelines for pregnant patients with most of these (and other) neurological disorders, and the decision whether or not to administer regional anesthesia is based on an individual risk-to-benefit ratio on a case-by-case basis, few of these disorders contraindicate the use of neuraxial anesthesia. This article attempts to review the specific concerns for administration of labor analgesia posed by multiple sclerosis, myasthenia gravis, epilepsy, paraplegia and subarachnoid hemorrhage.

Placebo controlled, randomised, double blind study of the effects of botulinum A toxin on detrusor sphincter dyssynergia in multiple sclerosis patients

OBJECTIVE

The purpose of the study was to evaluate the efficacy and safety of botulinum A toxin in the treatment of detrusor sphincter dyssynergia in multiple sclerosis patients.

METHODS

This was a multicentre, placebo controlled, randomised, double blind study. Patients with chronic urinary retention were included if they had post-voiding residual urine volume between 100 and 500 ml. They received a single transperineal injection of either botulinum A toxin (100 U Allergan) or placebo in the sphincter and also 5 mg slow release alfuzosin bid over 4 months. Main endpoint was post-voiding residual urine volume assessed 1 month after injection. Follow up duration was 4 months. Statistical analysis was performed using a sequential method, the triangular test.

RESULTS

The study was stopped after the fourth analysis (86 patients had been included: placebo: 41, botulinum A toxin: 45). At inclusion, there was no significant difference between groups whichever variable was considered. Mean (standard deviation) post-voiding residual urine volume was 217 (96) and 220 (99) ml in placebo and botulinum A toxin groups, respectively. One month later, post-voiding residual urine volume was 206 (145) and 186 (158) ml (p = 0.45) in placebo and botulinum A toxin groups, respectively. However, compared to placebo, botulinum A toxin significantly increased voiding volume (+54%, p = 0.02) and reduced pre-micturition (-29%, p = 0.02) and maximal (-21%, p = 0.02) detrusor pressures. Other secondary urodynamic endpoints and tolerance were similar in the two groups.

CONCLUSIONS

In multiple sclerosis patients with detrusor sphincter dyssynergia, a single injection of botulinum A toxin (100 U Allergan) does not decrease post-voiding residual urine volume.

[The impact of spinal cord injury on sexuality and reproduction]

Spinal cord injury is known to have a major impact on human sexual function. The disturbances depend on the level and completeness of the lesion. The majority of people affected by spinal cord injury are young and in their reproductive years. In these cases sexuality reflects an important aspect of personality, and therefore special attention needs to be given to this issue during rehabilitation. Sexual rehabilitation encompasses both comprehensive information and consultation as well as diagnosis and treatment of disturbed sexual functions. Successful rehabilitation and integration depend also on restoration of sexual function or adequate therapy of sexual dysfunction. This review will consider the present knowledge about the impact of spinal cord injury on female and male sexual function, the currently available treatment options as well as the aspects of fertility and reproduction in this patient population.

Obstetric Management of the Patient With Spinal Cord Injury

Pregnancies in spinal cord-injured patients present unique clinical challenges to obstetric providers. Spinal cord injury (SCI) alters the function of multiple organ systems, and chronic medical conditions are extremely common in this patient population. Autonomic dysreflexia (ADR) is a potentially life-threatening complication of SCI, usually involving patients with spinal cord lesions at or above the T6 level. Intrapartum care of women with SCI is particularly complicated, and labor is the period during which ADR is most likely to arise. A multidisciplinary team in a unit capable of invasive hemodynamic monitoring should deliver these patients. Epidural anesthesia should be administered early in labor to prevent ADR. If proper precautions are taken, most patients with SCI will have successful vaginal deliveries at term.

Anesthesia for Cesarean section in a patient with paraplegia resulting from tumour metastases to spinal cord

PURPOSE

Spinal cord injured patients present multiple unique challenges to the anesthesiologist. These include choice of muscle relaxant and management of autonomic hyperreflexia. We report the anesthetic management for Cesarean delivery in a patient who was paraplegic due to spinal canal metastases. Preeclampsia and fever complicated this case.

CLINICAL FEATURES

The patient presented at 29 wk gestation with progressive paraplegia at the T10 level due to metastatic osteosarcoma. She had a decompressive laminectomy without improvement in her paralysis. She subsequently developed preeclampsia at 31 wk gestation, and underwent Cesarean delivery for breech presentation under general anesthesia. Anatomical concerns left us unsure of the efficacy or safety of neuraxial anesthesia.

CONCLUSIONS

Preeclampsia and autonomic hyperreflexia are generally indications for regional anesthesia for Cesarean section. Tumour in her spinal canal and laboratory abnormalities including thrombocytopenia and a potential urosepsis dissuaded us from this option. Additionally, rapid sequence induction and intubation were not preferred due to paraplegia, leading us to secure the airway fibreoptically.

Assessing the knowledge of future internists and gynecologists in caring for a woman with tetraplegia

OBJECTIVE

To assess the knowledge base and comfort level of potential physician "gatekeepers" when treating women with spinal cord injuries. Residents with at least 1 year of training in either internal medicine (IM) or obstetrics and gynecology (Ob/Gyn) from a large academic urban medical center were surveyed.

STUDY DESIGN

This study used a written questionnaire that included a case scenario of a young woman with C6 tetraplegia who presented to her primary care physician for a routine visit. Information about the patient from her history and physical and laboratory exams was presented in stages, followed by open-ended queries to elicit information about the residents' problem-solving processes and management strategies.

RESULTS

Thirty-eight percent (30 of 79) of the IM residents and 64% (14 of 22) of the Ob/Gyn residents completed the questionnaire. Significant deficits in knowledge about physical accessibility, spasticity management, and potential disability-related medical complications in pregnancy were found. More Ob/Gyn residents were aware of the risk of autonomic hyperreflexia than IM residents, whereas the IM residents demonstrated greater awareness of neurogenic bladder and skin problems. Both groups indicated they were not very comfortable in managing the patient's care.

CONCLUSIONS

The results raise concern about the adequacy of the training of primary care physicians to meet the needs of people with severe disabilities.

Anaesthesia for chronic spinal cord lesions

Increasing numbers of patients with spinal cord injury present for surgery or obstetric care. Spinal cord injury causes unique pathophysiological changes. The most important peri-operative dangers are autonomic dysreflexia, bradycardia, hypotension, respiratory inadequacy and muscle spasms. Autonomic dysreflexia is suggested by headache, sweating, bradycardia and severe hypertension and may be precipitated by surgery, especially bladder distension. Patients with low, complete lesions, undergoing surgery below the level of injury, may safely do so without anaesthesia provided there is no history of autonomic dysreflexia or troublesome spasms. An anaesthetist should be present to monitor the patient in this situation. General anaesthesia of sufficient depth is effective at controlling spasms and autonomic dysreflexia but hypotension and respiratory dysfunction are risks. There is a growing consensus that spinal anaesthesia is safe, effective and technically simple to perform in this group of patients. We present a survey of 515 consecutive anaesthetics in cord-injured patients and a review of the current literature on anaesthesia for patients with chronic spinal cord lesions.

Pregnancy in spinal cord injured women

The management of pregnancy, labor, and delivery in women with spinal cord injury (SCI) has received increased attention by investigators and clinicians in recent years. Physicians who care for women with SCI need to become familiar with the general principles of care during pregnancy. This article presents a summary of publications identified by a MEDLINE search of the topics spinal cord injury, paraplegia, tetraplegia, and pregnancy, and by reviewing the reference lists of these articles. The current medical literature suggests excellent overall maternal and neonatal outcome. Certain medical complications such as urinary tract infections and autonomic hyperreflexia are predictable and can be managed successfully. Obstetrical management is changed little by SCI but needs to account for the risk of unattended delivery in the patient with a high level of lesion.

Pregnancy, labor and delivery in a woman with a damaged spinal cord

We report here a case involving the pregnancy, labor and delivery of a woman with a damaged spinal cord. In our case, even though the cord was damaged below the Th11, continuous epidural anesthesia was needed to prevent autonomic hyperreflexia. The patient's and infant's subsequent courses were normal.

Autonomic hyperreflexia with spinal cord injury

Autonomic hyperreflexia occurs in up to 85 percent of individuals with spinal cord injuries above the major splanchnic sympathetic outflow. In such cases, paroxysmal reflex sympathetic activity develops in response to noxious stimuli below the level of the neurologic lesion. The clinical features of autonomic hyperreflexia are due largely to reflex sympathetic adrenergic and cholinergic discharges with dysfunctional supraspinal regulatory control. Cephalgia, diaphoresis, flushing, tachycardia or bradycardia, and paroxysmal hypertension are most commonly observed. Although a variety of stimuli can provoke autonomic responses of variable magnitudes, bladder and bowel distention continue to account for most episodes. Removal of the offending stimulus is important to restoring the autonomic nervous system to its baseline activity. Current understanding of the pathophysiology, clinical features, and medical management of this fascinating but potentially serious complication of spinal cord injury are reviewed.

The impact of spinal cord injury on female sexuality, menstruation and pregnancy: a review of the literature

Spinal cord injury (SCI) results in alterations in sexual functioning. This area has been studied in depth in males; however, the literature pertaining to female sexual dysfunction after injury is sparse and focused primarily on menstruation and pregnancy. This report reviews the literature on female sexuality, menstruation and pregnancy after SCI and discusses the findings.

Management of the pregnant woman with spinal cord injuries

This paper forms part of an ongoing prospective study of pregnancy and labour in women with spinal cord injuries and combines a prospective and retrospective analysis of 17 pregnancies in 15 women with spinal injuries. The management and outcome in those 17 pregnancies is reviewed.