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Biomedical subjects

J L Stone

Publications and source records attributed to J L Stone.

At least 55 records · Page 3Linked to original sources

Introduction of the human Horsley-Clarke stereotactic frame.

It is well known that the Horsley-Clarke frame was developed and first used by Robert Henry Clarke and the pioneer neurosurgeon Victor Horsley in 1906 for making lesions in the central nervous system of animals. The Horsley-Clarke frame was extensively used throughout the next 4 decades for excitation and lesion production in animals. Aubrey Mussen, a student of Clarke, designed a stereotactic apparatus for use in humans, but no procedures were actually performed with the instrument. It is less appreciated that a Horsley-Clarke frame was also constructed for human use and first applied for depth electroencephalography by Robert Hayne and Frederic Gibbs in 1947. The assumed relationship between external landmarks and intracranial structures provided initial target localization, and pneumoencephalography confirmed depth electrode position. In many ways, the work of Hayne and Gibbs paralleled the simultaneous efforts of Ernest A. Spiegel and Henry T. Wycis. Events leading to the development of stereotactic frames and their subsequent use in humans for the treatment of epilepsy, movement disorders, and psychosurgery are reviewed.

Animals↗

Evaluating physical functional outcomes: one category of the NOC system.

All professional health care disciplines are now being held accountable to demonstrate the outcomes they produce. It is imperative that nurses demonstrate the difference they make in patient care to justify the cost of professional nursing. Standardized language is needed to aggregate data and report information on nursing interventions and associated outcomes. The Nursing Outcomes Classification (NOC) system is the first comprehensive classification of nursing-sensitive patient outcomes. In this review, the development of this classification system with specific results related to physical functional status and implications of NOC for nursing practice are discussed.

Activities of Daily Living↗

Cavernous angioma of the upper cervical spinal cord. A case report.

STUDY DESIGN: The treatment of a patient with progressive neurologic deficit secondary to a cavernous angioma located in the dorsal midline of the upper-most cervical spinal cord was described. OBJECTIVES: An illustrative case of a patient with an exophytic cavernous angioma of the cervical spinal cord near the cervicomedullary junction was presented, the literature reviewed, and the treatment of these patients discussed. SUMMARY OF BACKGROUND DATA: Cavernous angiomas of the spinal cord were rarely seen, and only more recently appreciated with the advent of MRI scanning. These lesions were usually intramedullary in location. Intradural extramedullary cavernous angiomas, or intramedullary lesions with exophytic extramedullary extension, were particularly rare and usually occurred at the cauda equina. METHODS: The surgical treatment of a patient with an exophytic cavernous angioma of the upper cervical spinal cord was presented. RESULTS: This patient underwent surgery after a hemorrhage that occurred after the patient was treated conservatively for several years. The entire lesion was resected with standard microsurgical technique, and the neurologic symptoms subsequently resolved. CONCLUSIONS: This entity should be suspected in the differential diagnosis of patients with progressive and step-wise deterioration of spinal cord function. Although these patients can be treated conservatively, those with progressive neurologic deficits should undergo microsurgical resection to avert subsequent lesion enlargement or repeated hemorrhage.

Adult↗

Nonmelanoma skin cancer in Japanese ethnic Hawaiians in Kauai, Hawaii: an incidence report.

BACKGROUND: Incidence reports of nonmelanoma skin cancer (NMSC) in Japanese persons are limited. Most studies have relied primarily on hospital records or voluntary reporting systems. OBJECTIVE: Our purpose was to determine the incidence of basal cell carcinoma (BCC), squamous cell carcinoma (SCC), and Bowen's disease (BD) in a defined Japanese population. METHODS: A prospective 5-year population-based incidence study was conducted on the island of Kauai, Hawaii from 1983 through 1987. RESULTS: Thirty Japanese Kauai residents, 12 men and 18 women, developed BCC during the 5-year study period. At the same time, 24 Japanese, 6 men and 18 women, were identified with SCC, and 11 had BD, three men and eight women. When standardized to the Japanese population in Japan, the annual BCC incidence rate was 30 per 100,000 Japanese Kauai residents with an average patient age of 75 years. More than 80% of these BCCs were localized to the head and neck. New BCCs developed in four patients with BCC, but none was a recurrence of a previously treated lesion. Five patients with BCC had SCC or BD concurrently or at other times. The SCC incidence was 23 per 100,000 Japanese Kauai residents with an average patient age of 80 years. The head and neck were again the most common anatomic sites. New SCCs subsequently occurred in two patients, in one of whom a localized recurrence also developed. Five patients with SCC had BCC simultaneously or at other times. The incidence of BD was 13 per 100,000 Japanese Kauai residents with an average patient age of 74 years. The extremities were the most common anatomic sites. One patient later had a new BD lesion and a recurrent BD lesion. Two patients had BCC or SCC at other times. CONCLUSION: We report incidence rates of BCC, SCC, and BD at least 45 times higher in the Japanese population in Kauai, Hawaii than rates for the Japanese population in Japan. Kauai's intense UV radiation and emphasis on outdoor activities may contribute. More Japanese women had NMSC than men, a sex difference not observed in Japan.

Aged↗

Demographics of civilian cranial gunshot wounds: devastation related to escalating semiautomatic usage.

The demographics and outcome of patients with gunshot wounds to the head over the past 10 years at Chicago's Cook County Hospital was examined. The study group consisted of 476 consecutive patients admitted to this urban level I trauma center with a diagnosis of penetrating craniocerebral missile injury. All patients followed a protocol that included aggressive surgical management when indicated. The Glasgow Outcome Score was used to assess outcome. There is an alarming rise in firearm violence in general and craniocerebral injury in particular. Some patients with severe neurologic deficits and massive cerebral damage can benefit from aggressive treatment and make a good recovery. A large proportion of this violence is most likely attributable to gang activity. Factors correlating with poor outcome included hypotension, apnea, bihemispheric injuries, or ventricular penetration. Although aggressive surgical and medical management improves the outcome of these patients, much more stringent preventative measures are required to control this violent epidemic.

Adolescent↗

Keratoacanthoma in Japanese Hawaiians in Kauai, Hawaii.

BACKGROUND: This is the first incidence report of keratoacanthoma (KA) in a Japanese ethnic population. METHODS: The study was designed as a 5-year prospective incidence study using an island-wide survey of Japanese residents in Kauai, Hawaii, during the years 1983 through 1987. RESULTS: Eleven Japanese residents of Kauai, three men and eight women, had KA. The crude incidence is 22.1 per 100,000 Japanese Kauaiian population. Two thirds of the lesions were on the extremities. No recurrence was noted, but a nonmelanoma skin cancer developed in some patients. CONCLUSIONS: The incidence of KA in a Japanese ethnic population is not low. Ultraviolet light exposure must, in part, contribute to the development of KA. This is supported by fact that the incidence of KA in Japanese residents in Kauai is much higher than in Japan and that most of the KAS appear on exposed skin.

Aged↗

Squamous cell carcinoma in Kauai, Hawaii.

BACKGROUND: It is estimated that over 100,000 new cases of squamous cell carcinoma are diagnosed in the United States annually. This number is compounded by an increasing concern over the ozone layer depletion and the continued sunbathing behavior of many individuals. This could be particularly acute in Hawaii, which may have the highest rates of skin cancer in the country. We believe the updated information on skin cancer is essential to address the magnitude of the problem. METHODS: A prospective 5-year population-based incidence study was conducted on Kauai, Hawaii, between 1983 and 1987 to investigate the frequency of squamous cell carcinomas in resident Caucasians. RESULTS: A total of 58 residents, 37 men and 21 women, were identified with an initial episode of squamous cell carcinoma during the 5-year period. The average annual incidence rate per 100,000 Kauai Caucasian residents, standardized to the 1980 U.S. white population, was 153 for men and 92 for women with a combined rate of 118. The average patient age was 66.4 years. The head and neck was the most common anatomic site, with the extremities second. Subsequent new squamous cell carcinoma occurred in 13.8% of patients. Only one patient (2%) developed a recurrence after treatment. Twenty-five patients (43%) had basal cell carcinoma simultaneously or at other earlier times. CONCLUSIONS: In Kauai the incidence rate of squamous cell carcinoma is the highest yet documented in the United States. No consistent trend in incidence rates was appreciated during this 5-year period.

Adult↗

Use of the Horsley-Clarke stereotactic frame in humans.

It is well known that the Horsley-Clarke frame (HCF) was developed and engineered by the British physicians Robert Henry Clarke and Victor Horsley in 1906 for use in animals. It is less appreciated that the HCF was also used by the Frederic Gibbs group in 1947 for studies of human epileptics. Subcortical depth electrodes were placed using the relationship between external landmarks and intracranial structures and confirmed by pneumoencephalography. Events leading to the development of the HCF and its subsequent use in humans for depth recordings, and lesion production in the treatment of epilepsy, movement disorders, and psychosurgery are discussed.

Animals↗

Gunshot wounds to the head in civilian practice.

An aggressive surgical strategy was applied to cranial gunshot wound victims at Cook County Hospital in Chicago from 1983 to 1992. A series of 480 patients with an overall mortality rate of 34% is presented. A total of 150 patients underwent craniotomy with an operative mortality rate of 21%. Criteria for operation were Glasgow Coma Scale scores of 3 through 7 without hypotension or fixed and dilated pupils or Glasgow Coma Scale scores of 8 through 15 with intracranial bone fragments or significant clot. This study supports previous reports that even patients with severe neurological deficits and massive cerebral damage can benefit from aggressive treatment and make satisfactory recoveries.

Adolescent↗

Patients with Glasgow Coma Scale scores 3, 4, 5 after gunshot wounds to the brain.

Even this information is only partial. To study fully the effects of treatment would require optimal care at all points from time of injury, including rapid prehospital resuscitation, rapid transport to an optimally equipped and staffed hospital, immediate evaluation and treatment of the initial injury and all complications, rapid and comprehensive rehabilitation, and supportive and flexible home and work settings for the patient on discharge. Patients would need to be stratified for premorbid characteristics, including intelligence, personal traits, and training. Prolonged follow-up, possibly for several years, would be required to determine true outcome. No current study contains sufficient numbers of patients treated optimally and studied for prolonged periods, but this should be done. One way of looking at such patients is to decide that many should be treated to salvage a few. The other way of looking at them is that so many must receive care, at great emotional and economic cost to themselves and others, that such treatment is inappropriate for any of them. Treating all such patients would be a major undertaking. If most of these patients were treated vigorously, a great proportion of them would still die but probably not for a number of days. During this period, their families would be under extreme stress. Once stabilized and receiving ongoing care, some patients would enter a permanent vegetative state and survive for prolonged periods until their prognosis was clear and care was withdrawn, again causing family stress as well as high cost. Some would likely survive although impaired. The charges and real costs of care for all these patients would be tremendous. The question therefore arises as to how to decide what to do about caring for a large group of patients whose maximal care would be costly in emotional and financial terms, particularly at a time when it is recognized that resources for medical care are going to be limited. When discussing such patients as a group with a view toward developing practice guidelines, many considerations must be brought to bear. One consideration is the certainty of the prognosis in both a quantitative and a qualitative sense in an individual case. It is not clear that one can be certain in patients except when there are overwhelmingly unfavorable features. As has been noted, even patients who have been shot through the geographic center of the brain and are posturing can make excellent recoveries. This would push toward aggressive treatment for many patients. Decision making must therefore be considered in terms of bioethics. The major principle-based systems of bioethics are deontologic, arising from accepted principles, and utilitarian, arising from effect on outcome. A virtue-based ethic for physicians arising from "the caring bond and the public trust" is being revived as a balance to analytical ethics. A similar orientation from the point of view of patients is communitarian ethics, that is asking for only what is reasonable and not so much as might harm others. Some of the issues to be considered include the sanctity of life while taking into account the criteria for life--vegetative function versus some level of mental function. One must also review each decision from the viewpoints of all the parties involved--patients, family and friends, physicians, and society--in the context of a heterogeneous society in which individual rights and tolerance enforced by law are primary features. In the patients' terms, there is a desire and right to medical care to maintain a healthy productive life. Even if impaired to some extent, patients may still have an interest in living. Balancing benefits and burdens of life is a complex problem. There is also the right, based on patients' values, to refuse care if there is the wish not to take a chance of having a significantly compromised existence. Such declaration before injury should be honored...

Brain Injuries↗

Intradural thoracic disc herniation.

STUDY DESIGN: Patients with intradural herniation of an intervertebral disc were identified and managed surgically. OBJECTIVES: Illustrative cases of patients with intradural herniated discs at the mid-thoracic level are presented, the literature is reviewed, and the management of these patients is discussed. SUMMARY OF BACKGROUND DATA: Intradural herniation of an intervertebral disc is rare and most common at the lumbar level, but isolated cases have been reported at other levels. Cases reports of this entity have been published, but the surgical details have not been adequately addressed. METHODS: In this report, two patients with calcified intradural herniated discs at the mid-thoracic level are presented. RESULTS: Both patients had progressive paraparesis and had calcified disc material in the mid-thoracic canal. Both were treated successfully with a posterolateral extracavitary costotransversectomy and hemilaminotomy using intraoperative ultrasound and somatosensory-evoked potential monitoring. CONCLUSIONS: This entity should be suspected when a calcified disc within the spinal canal is being treated. The optimal exposure is a posterolateral extracavitary costotransversectomy with a hemilaminotomy. Alternative approaches to a typical thoracic disc would be problematic in managing these patients.

Dura Mater↗

An estrogen receptor genetic polymorphism and the risk of primary and secondary recurrent spontaneous abortion.

OBJECTIVE: A case-control study was undertaken to assess the association between an estrogen receptor gene variant and the risk of recurrent spontaneous abortions. STUDY DESIGN: The frequency of the estrogen receptor gene variant in blood lymphocyte deoxyribonucleic acid and other selected maternal characteristics was compared among 60 primary recurrent aborters, 61 secondary recurrent aborters, and 43 women who had had at least two live births but no spontaneous abortions. RESULTS: No association was evident between the estrogen receptor gene variant and the risk of either primary or secondary recurrent abortion. There were data suggesting that primary recurrent aborters in particular were more likely to report a family history of recurrent abortion and a family history of breast cancer. CONCLUSIONS: These findings indicate that the estrogen receptor polymorphism is not a genetic marker for recurrent spontaneous abortions. Therefore, as suggested by previous investigations, this polymorphism appears to be a marker for breast cancer risk only among the subgroups who have had a history of repeated abortions.

Abortion, Habitual↗

Bowen's disease (squamous cell carcinoma in situ) in Kauai, Hawaii. A population-based incidence report.

BACKGROUND: The incidence of Bowen's disease (squamous cell carcinoma in situ) is rarely investigated. OBJECTIVE: Our purpose was to report the incidence of Bowen's disease in a defined Caucasian population in Kauai, Hawaii. METHODS: We conducted a prospective 5-year population study. RESULTS: We found 71 Caucasian residents, 44 men and 27 women, who had an initial episode of Bowen's disease during the 5-year period. The average annual incidence rate per 100,000 Caucasian residents of Kauai, standardized to the 1980 U.S. Caucasian population, was 174 for men and 115 for women, with a combined rate of 142. The incidence increased in older age groups. The mean age of the patients was 65.2 years. The most common anatomic site was the extremities. Subsequent Bowen's disease occurred in eight patients (11.3%). Recurrence after treatment developed in only one patient (1.4%). Twenty-six patients (36.6%) had concurrent skin cancers, either basal cell carcinoma or squamous cell carcinoma, or both. There was no increased incidence of internal malignancy. CONCLUSION: The incidence of Bowen's disease is high in Caucasian residents of Kauai and is 10 times higher than that reported from a northern Midwestern community. Kauai's intense ambient UV light and greater opportunity for year-round outdoor activities likely contributes to this higher rate.

Adult↗

Use of cervical prostaglandin E2 gel in patients with previous cesarean section.

The aim of this study was to determine whether preinduction cervical ripening with prostaglandin E2 (PgE2) gel in patients with one previous cesarean section may be used with the same safety and efficacy as in patients without a uterine scar. Primiparous patients (n = 94) with one previous cesarean section were retrospectively compared to nulliparous patients (n = 866). Both groups underwent preinduction cervical ripening with 2 mg intracervical PgE2 gel. Logistic regression was performed to control for confounding factors. Our statistical power was 90% for detecting a doubling of the complication rate, from 10 to 20%. There were no significant differences in the duration of ruptured membranes or length of labor between the two groups. No significant differences were detected in the rate or indications for cesarean section, presence of thick meconium, epidural anesthesia use, amnionitis, or maternal and neonatal morbidity. There were no cases of uterine rupture in either group. PgE2 gel may be used with the same safety and efficacy in patients with previous cesarean section as in nulliparas.

Administration, Intravaginal↗

The development of neurological surgery at Cook County Hospital.

The development of neurosurgery in Chicago has rather unique beginnings. The key contributions by well-known general surgeon demonstrators who worked at Chicago's Cook County Hospital in the late 1800s and early 1900s are highlighted. The formation of neurosurgical academic programs and educational development in Chicago is detailed further and placed in perspective.

Chicago↗

Risk factors for severe preeclampsia.

OBJECTIVE: To identify risk factors associated with severe preeclampsia and to determine whether these factors are similar in nulliparous and multiparous patients. METHODS: Patients whose pregnancies were complicated by severe preeclampsia (n = 70) were compared retrospectively to 18,964 non-preeclamptic controls. Information on maternal demographic factors; medical, obstetric, and family histories; and neonatal outcome was retrieved and analyzed by univariate and multivariate analysis. RESULTS: By logistic regression, the only risk factors associated with the development of severe preeclampsia were severe obesity in all patients (adjusted odds ratio 3.5, 95% confidence interval [CI] 1.68-7.46) and a history of preeclampsia in multiparous patients (adjusted odds ratio 7.2, 95% CI 2.74-18.74). CONCLUSION: Severe obesity and a history of preeclampsia are the only maternal risk factors identified for the development of severe preeclampsia.

Adult↗