ABSTRACT
Abstract: The first act of assisted suicide in Italy was recently carried out. This event is an absolute novelty for the country, affected by recent legislative changes aimed only at introducing the right to interrupt health treatments and, therefore, carry out exclusively omissive end-of-life acts. These normative provisions lay their foundations in a cultural context centered on the protection of the right to life and health; however, the cases that have occurred over time, including the famous story of DJ Fabo, have led the Constitutional Court to re-evaluate these dictates, introducing in 2019 the right to resort to assisted suicide procedures within well-defined areas, including incurability of the condition, the serious suffering of the individual and the retained ability to stand trial. The case addressed concerns a quadriplegic subject who was the victim of a road accident. Following consultation with a specialized institution, the subject made the decision to undergo an assisted sui-cide procedure in Italy. Having obtained the authorization from the competent authorities, he started a fundraiser to finance the devices and drugs required and, finally, he died. The opening by Italy towards the assisted suicide procedure represents a great step towards a broad context, as well as a decisive act for the purpose of protecting the right to self-determination of the individual. However, the current legislative framework presents significant criticalities and shortcomings. In first place, the dissonance between the laws in force and the judicial sentences is likely to generate problems of uneven application of the rules in a country dominated by the principle of Civil Law. Furthermore, the need for the applicant to fully self-finance the procedure clearly clashes with the constitutional principle of free access to care. Then emerges the need for a guideline document regarding the completion of the procedure itself, the times, methods and drugs implied, in order to significantly reduce the decision-making process by the ethics committees that still weighs on each individual case. Finally, conside-ring what has been observed on the subject of voluntary termination of pregnancy, it is necessary to ask what will be the general orientation of the doctors called to perform the act and whether they will be given the opportunity to express their refusal. The case analyzed could represent the beginning of a new era for Italian culture, but the large-scale application of assisted suicide procedures requires the introduction of legislative provisions that definitively eliminate the critical issues that have emerged so far.
Subject(s)
Suicide, Assisted , Humans , Male , Death , European People , Italy , Personal Autonomy , Suicide, Assisted/legislation & jurisprudenceABSTRACT
Background: The concept of damages for loss of chance originated in France in 1877 and was adapted to healthcare in 1962. In Italy, it was first introduced in healthcare liability in 2004, with Civil Court of Cassation decision No. 4400. Italian jurisprudence recognizes the loss of chance as an independent, legally and economically assessable damage, distinct from the actual outcome lost. The landmark St. Martin Judgments of 2019 further established that such damages can be claimed if they involve appreciable, serious, and consistent values. This requires proving a causal link between the conduct and the lost chance, based on established civil law criteria. Case report: 1) a 71-year-old man whose lung carcinoma was not diagnosed in time, leading to a significant reduction in survival chances. 2) a woman whose breast cancer diagnosis was delayed, resulting in a more advanced stage and decreased survival prospects. Discussion: In medical professional liability, the Supreme Court requires a high probability or certainty of causation for recognizing the causal link between wrongful conduct and damage. The assessment involves proving both the causal link and the reasonable probability of a lost opportunity's realization. Hypothetical damage is insufficient for compensation. Conclusions: The compensability of loss of chance relies on proving the causal link between the negligent act and the uncertain event, where the impact on the patient's non-pecuniary sphere is significant. Medicolegal practice faces challenges in distinguishing between causality and damage, which can lead to confusion between biological damage and damage from loss of opportunity.
Subject(s)
Breast Neoplasms , Liability, Legal , Lung Neoplasms , Malpractice , Aged , Humans , Female , Male , Uncertainty , Italy , Malpractice/legislation & jurisprudence , Compensation and Redress/legislation & jurisprudenceABSTRACT
Objective: Artificial intelligence (AI) is the ability of a computer machine to display human capabilities such as reasoning, learning, planning, and creativity. Such processing technology receives the data (already prepared or collected), processes them, using models and algorithms, and answers questions about forecasting and decision-making. AI systems are also able to adapt their behavior by analyzing the effects of previous actions and working then autonomously. Artificial intelligence is already present in our lives, even if it often goes unnoticed (shopping networked, home automation, vehicles). Even in the medical field, artificial intelligence can be used to analyze large amounts of medical data and discover matches and patterns to improve diagnosis and prevention. In forensic medicine, the applications of AI are numerous and are becoming more and more valuable. Method: A systematic review was conducted, selecting the articles in one of the most widely used electronic databases (PubMed). The research was conducted using the keywords "AI forensic" and "machine learning forensic". The research process included about 2000 Articles published from 1990 to the present. Results: We have focused on the most common fields of use and have been then 6 macro-topics were identified and analyzed. Specifically, articles were analyzed concerning the application of AI in forensic pathology (main area), toxicology, radiology, Personal identification, forensic anthropology, and forensic psychiatry. Conclusion: The aim of the study is to evaluate the current applications of AI in forensic medicine for each field of use, trying to grasp future and more usable applications and underline their limitations.
Subject(s)
Artificial Intelligence , Forensic Medicine , Humans , Forensic Medicine/methods , Machine Learning , ForecastingABSTRACT
Background: Gender gap is a neologism that identifies the disparity between social and professional conditions experienced by females compared to males. The disparity increases as one ascends the academic hierarchy. In recent years, the debate has expanded, and more options have been planned for the elimination of the current gender gap. Methods: This research was conducted by examining the landscape of the gender gap, particularly in the academic forensic medicine field. Our analysis involved reviewing papers published between 2006 and 2024, identified through electronic database searches (PubMed). The search terms used were: "gender gap" AND "academic" AND "medicine" AND "leadership." In total, we analyzed 85 papers. Additionally, we examined data from forensic medicine residency programs. Conclusions: The representation of women in medicine is well-known. Despite the increasing number of women in leadership positions in medicine, they still lag significantly behind men. These data highlight a situation that could be seen as grounds for an accusation of "academic abuse". In the Italian forensic residency programs, less than 20% are led by women, and among these, not all hold the rank of full professor. Although a certain rebalancing is already underway, the gap is still significant. There are already regulations obliging local authorities to promote gender equality in councils, companies, and institutions under their jurisdiction. It would be desirable to consider minimum quotas for female participation in university competitions. This would be a first step toward eliminating the gender gap in academic and forensic medical fields.
Subject(s)
Sexism , Humans , Female , Male , Italy , Sexism/statistics & numerical data , Leadership , Forensic Medicine/education , Faculty, Medical/statistics & numerical data , Internship and Residency/statistics & numerical data , Physicians, Women/statistics & numerical data , Gender EquityABSTRACT
Abstract: The right to live with dignity during the final stages of existence, enshrined in national and supranational Charters of Rights, represents a significant step towards humanizing medicine and is integral to the right to health. Palliative Care, rooted in health, dignity, and therapeutic self-determination, has emerged as a fundamental human right and a moral imperative within health systems. It seeks to alleviate suffering, emphasizing the holistic well-being of patients with life-limiting illnes-ses. This paper provides an analysis of the current situation of Palliative Care in Italy and examines its critical aspects, also in relation to the issues found in other European and non-European countries. In Italy, although laws have been enacted to ensure the provision of Palliative Care, its availability remains inconsistent across different regions. Financial constraints and insufficient support hinder the comprehensive dissemination of these services. Recognizing the significance of Palliative Care, the Catholic Church also endorses its implementation as a response to human suffering and an approach to end-of-life care. Efforts to strengthen Palliative Care are critical to meeting the rising demand and ensuring access to compassionate and dignified care for all individuals in need. Through legislative advancements and adequate resources, Italy can make significant strides in advancing the provision of Palliative Care.
Subject(s)
Human Rights , Palliative Care , Italy , Palliative Care/legislation & jurisprudence , Palliative Care/ethics , Humans , Human Rights/legislation & jurisprudence , CatholicismABSTRACT
Abstract: The COVID-19 pandemic had a significant global impact on public health. The increasing demand for intensive care and the closure of several health facilities has led to a reduction in the assistance of non-COVID patients. In our study, we investigated what changes health professionals have experienced in their professional activities and how they coped with them. A questionnaire was sent to 146 doctors, focused on three subjects: type of activity carried out during the pandemic; use of personal protective equipment (PPE) and recourse to vaccination; current medical liability profiles related to COVID-19. The questionnaire was completed by 111 doctors. The study showed no significant differences in the questionnaire response as regards the demographic and work variables of the participants (gender, age, area of specialties). Most of doctors assisted potentially positive patients, which also imposed derogations on their safety. Most of the complaints were about the low adequacy of PPE provision and about the compromission of specialist medical care. The interest in safety among participants was revealed by the high compliance to vaccination, with almost complete coverage. The questionnaires showed that most doctors (72,7%) believe that specialist medical care has been impaired during the COVID-19 pandemic. Secondly, a high percentage of participants (79.8%) expressed the need for both civil and criminal limitation of liability in connection with work in the management of SARS-Cov-2 patients. In conclusion, this survey tried to contribute to the identification of the main problems presented by healthcare professionals. Their versatility was a crucial element for the management of the pandemic, but also highlighted the need for health institutions to prepare pandemic plans in the future, with adequate and constant updating. Concerns were raised regarding financial deficits and legal protection. Political decisions must be entrusted to enhance medical assistance and to avoid the increasing phenomenon of defensive medicine.
Subject(s)
COVID-19 , Physicians , Humans , COVID-19/epidemiology , COVID-19/prevention & control , SARS-CoV-2 , Pandemics/prevention & control , Surveys and QuestionnairesABSTRACT
End-of-life decisions are an emergent issue for bioethical debates and practical concerns among health professionals. On December 2017, Italy enacted a new law named "Rules about informed consent and advance directives", which promotes the relationship of care in a fiduciary sense through the implementation of a correct and exhaustive information. It is also prescribed to record in writing all the patients' decisions about consent or refusal. Furthermore, the law explicitly forbids unreasonable therapeutic obstinacy for terminal patient, legitimizing deep palliative sedation. Finally, the law establishes the use of "advance directives" as a written document by which adults and capable people can express their wishes regarding health treatments and diagnostic tests in anticipation of a possible future incapacity. The law provides that doctors must comply with these directives, unless they appear clearly incongruous or not corresponding to the patient's current clinical condition.
Subject(s)
Advance Directives/legislation & jurisprudence , Informed Consent/legislation & jurisprudence , Terminal Care/legislation & jurisprudence , Adult , Decision Making , Humans , ItalyABSTRACT
Spinal Epidural Abscess (SEA) is a rare pyogenic infection localized between dura mater and vertebral periostium. The development of SEA is associated with the presence of medical co-morbidities and risk factors that facilitate bacterial dissemination. It is possible distinguish two type of SEA: primary SEA due to pathogen hematogenous dissemination and secondary SEA resulting from direct inoculation of pathogen. This entity, very uncommon, shows a prevalence peak between the 5th and the 7th decade of life with predominance in males. The case is a 44 years old Caucasian man with chronic low back pain, treated with physiotherapy and anti-inflammatory drugs. Following an episode of acute severe exacerbation of pain, the patient underwent four session of dorsal and lumbo-sacral area mesotherapy. One month after the last session, the patient experienced acute sever lumbar pain, radiated to left lower limb and accompanied by fever and vomiting. During hospitalization, elevated levels of white blood cells and C Reactive Protein (CRP) were found. Moreover, a vertebral magnetic resonance imaging revealed the presence of intramedullary lesion. Furthermore, methicillin sensitive staphylococcus aureus was isolated from three blood cultures and antibiotic therapy was performed. In our case the patient had the typical SEA onset, without any specific risk factors excepting the execution of four session of mesotherapy. Aim of this study is to explain risk factors for the SEA development and to clarify how act as preventive measure, because also acupuncture can promote bacterial infection.
Subject(s)
Anti-Bacterial Agents/therapeutic use , Back Pain/drug therapy , Epidural Abscess/diagnosis , Epidural Abscess/prevention & control , Mesotherapy/adverse effects , Risk Management/methods , Staphylococcal Infections/drug therapy , Adult , Back Pain/diagnosis , Chronic Pain/diagnosis , Chronic Pain/drug therapy , Humans , Magnetic Resonance Imaging , Male , Risk Factors , Treatment OutcomeABSTRACT
INTRODUCTION: Post Mortem Computed Tomography (PMCT) and 3D reconstruction provide a powerful tool in the evaluation of the causes of death, distinguishing between those findings related to traumas and those related to post mortal changes. It has proven to be extremely useful in case of violent deaths as a support to the traditional autopsy. AIM OF THE STUDY: The aim of the study is to prove the essential role of PMCT in the determination of the cause of death. For this purpose, we present a case of homicide where CT scans were performed before the autopsy, thus bringing to the resolution of an otherwise controversial death. CASE PRESENTATION: A 17 years old male died from a gunshot fired by a policeman during a chase. There were some controversies in this case that brought it to the national mediatic attention. PMCT reconstructed images showed the entry point and the ballistic trajectory of the bullet, moreover, PMCT high sensitivity in the evaluation of bone lesions, made the technique diriment in the clarification of the sequence of events that brought to the death of the subject, resolving the controversies of the case. In fact, it showed that the trajectory of the bullet could have not been compatible with the victim's family thesis.
Subject(s)
Forensic Pathology/methods , Homicide , Tomography, X-Ray Computed/methods , Adolescent , Autopsy , Humans , Male , PoliceABSTRACT
The freedom-restraining measures used during Involuntary Health Treatment (IHT) are highly criticized in the medical community. Physical restraint techniques are currently largely used worldwide in Psychiatry. The use of restraints against the patient's will can be considered a serious intrusion of basic human rights and even an act of violence against the patient. In all cases, the restraint should not lead to injuries or damage to the patient's health and should be implemented with a respect of the human rights and dignity. Generally, the use of restraint should be considered as a last resource, when all the other methods have failed. Since it represents the principal freedom-limitation measure, it should be constantly monitored by physicians who apply these methods. The case of a 58 years-old white male, affected by chronic schizoaffective disorder and cannabinoid dependence, was under involuntary medical treatment as a consequence of antisocial behavior. During the IHT he suffered firstly a pharmacological restraint and then a physical restraint in order to suppress a slight state of agitation. The patient was completely blocked to the bed for more than 80 hours and died after three days of hospitalization. The aim of this study is to evaluate the suitability of restrictive methods for psychiatric patients in order to establish specific rules to prevent abuse of restraint techniques and even to help physicians to treat psychiatric patients.
Subject(s)
Psychiatry/methods , Psychotic Disorders/therapy , Restraint, Physical/standards , Hospitalization , Human Rights , Humans , Male , Middle Aged , Psychiatry/standards , ViolenceABSTRACT
The following letter addresses the issues of the applicability of physical restriction, with particular attention to the therapeutic regime and its meaning as a therapeutic or restrictive provision, while considering possible alternative measures in the context of Italian jurisprudence. The letter, in response to the questions posed by Cioffi and Tomassini, examines the possible legal implications for doctors and suggests that the integration of jurisprudence and psychiatry seems to be mandatory to define the operational protocols for the management of physical restraint. La seguente lettera affronta il problema relativo all'applicabilità della contenzione fisica, con particolare riferimento al regime terapeutico, nonché la sua valenza giuridica quale misura terapeutica o restrittiva, considerando eventuali approcci alternativi. La lettera, in risposta alle domande poste da Cioffi e Tomassini, esamina le possibili implicazioni legali cui possono incorrere i medici nell'applicare la contenzione fisica, suggerendo la necessità di un'integrazione tra le norme giurisprudenziale e la scienza psichiatrica, al fine di definire i protocolli operativi di gestione della contenzione fisica.
Subject(s)
Restraint, Physical , Humans , ItalyABSTRACT
Although muscle is considered to be the most important site for postprandial glucose disposal, the metabolic fate of oral glucose taken up by muscle remains unclear. We, therefore, employed the dual isotope technique (intravenous, [6-3H]-glucose; oral, [1-14C]glucose), indirect calorimetry, and forearm balance measurements of glucose, lactate, alanine, pyruvate, O2, and CO2 in nine normal volunteers to determine the relative importance of muscle glycogenic, glycolytic, and oxidative pathways in disposal of an oral glucose load. During the 5 h after glucose ingestion (1 g/kg), 37 +/- 3% (24.9 +/- 2.3 g) of the load was oxidized and 63 +/- 3% (42.8 +/- 2.7 g) was stored. At least 29% (19.4 +/- 1.3 g) was taken up by splanchnic tissues. Muscle took up 26% (17.9 +/- 2.9 g) of the oral glucose coincident with a 50% reduction in its oxidation of fat. 15% of the oral glucose taken up by muscle (2.5 +/- 0.9 g) was released as lactate, alanine, or pyruvate; 50% (8.9 +/- 1.4 g) was oxidized, and 35% (6.4 +/- 2.3 g) was available for storage. We conclude that muscle and splanchnic tissues take up a comparable percentage of an oral glucose load and that oxidation is the predominant fate of glucose taken up by muscle, with storage in muscle accounting for less than 10% of the oral load. Thus, contrary to the prevailing view, muscle is neither the major site of storage nor the predominant site of disposal of an oral glucose load.
Subject(s)
Glucose/metabolism , Muscles/metabolism , Administration, Oral , Adult , Alanine/blood , Blood Flow Velocity , Blood Glucose/analysis , Carbon Dioxide/blood , Female , Glucose/administration & dosage , Glycolysis , Humans , Insulin/blood , Lactates/blood , Lipid Metabolism , Male , Oxidation-Reduction , Oxygen/blood , Pyruvates/bloodABSTRACT
TAL1/SCL/TCL5 is a critical transcription factor for hematopoietic stem cell maintenance and regulation of early hematopoiesis. However, aberrant expression of TAL1 in committed T-cell precursors is also directly implicated in the development of T-cell leukemia. Roughly 25 years ago TAL1 was identified in early hematopoietic cells and involved in leukemia. Here, we review the wealth of knowledge gained since then on its physiological roles and mechanisms by which TAL1 ectopic expression contributes to leukemogenesis. We emphasize recent findings that shed light into the intricacies of TAL1 (epi)genetic regulation and the transcription network orchestrated by this major T-cell oncogene. Importantly, an exciting time is coming when data using the mechanistic knowledge accumulated on TAL1 may be used to develop novel anti-leukemia targeted therapies.
Subject(s)
Basic Helix-Loop-Helix Transcription Factors/physiology , Leukemia, T-Cell/etiology , Neoplastic Stem Cells/pathology , Proto-Oncogene Proteins/physiology , Basic Helix-Loop-Helix Transcription Factors/genetics , Carcinogenesis , Humans , Leukemia, T-Cell/genetics , Leukemia, T-Cell/pathology , Proto-Oncogene Proteins/genetics , T-Cell Acute Lymphocytic Leukemia Protein 1ABSTRACT
The ability of sugars to protect the beta cell from alloxan diabetes is highly stereospecific. The alpha anomer, which is present in equilibrium in both glucose and 3-O-methyl glucose (3-OMG) at approximately 34 per cent, provides greater protection than the beta anomer. The greater protection of the alpha anomer of glucose is present fifteen seconds between its administration and alloxan, but there is no difference in protection following a thirty-second interval. The nonmetabolized analogue, 3-OMG, provides even greater protection than glucose, and this higher affinity is expressed both by the lower dose necessary to provide protection, as well as by the higher dose of mannoheptulose needed to remove thr protection. Mannoheptulose not only removes the protection provided by exogenous glucose but sensitizes the beta cell to the toxic effects of alloxan in the fasting state, probably by inhibiting the protection provided by endogenous glucose. Mannoheptulose is able to remove glucose protection before, with, or after the administration of glucose prior to alloxan injection. Finally, the protective effect of both glucose and 3-OMG is time-related, and the protection not only is due to absolute concentration but also appears to be affected by a changing concentration.
Subject(s)
Alloxan/toxicity , Carbohydrates/pharmacology , Diabetes Mellitus, Experimental/prevention & control , Islets of Langerhans/drug effects , Animals , Blood Glucose/metabolism , Dose-Response Relationship, Drug , Fasting , Glucose/antagonists & inhibitors , Glucose/pharmacology , Male , Mannoheptulose/pharmacology , Methylglucosides/pharmacology , Poisoning/prevention & control , Rats , Receptors, Drug , Stereoisomerism , Structure-Activity Relationship , Time FactorsABSTRACT
A significant increase in CO2 production, reflecting carbohydrate oxidation and/or fat synthesis, is observed in normal subjects after the ingestion of glucose. The anatomic site(s) of this CO2 production has not yet been localized, although liver and muscle are logical considerations. To assess the contribution of skeletal muscle to this process, we measured whole-body and forearm CO2 flux in normal, postabsorptive subjects after the ingestion of 100 g of glucose and calculated their total muscle CO2 production. In the basal state, muscle accounted for 19% of total CO2 production, and, after glucose administration, muscle CO2 production did not change significantly. Thus, muscle is not the principal site of the observed increase in CO2 production.
Subject(s)
Carbon Dioxide/biosynthesis , Glucose/metabolism , Muscles/physiology , Adult , Blood Glucose , Humans , Male , Middle Aged , Muscles/metabolismABSTRACT
OBJECTIVE: The prevalence of systemic hypertension is increased in patients with diabetes. In this prospective, randomized, crossover clinical trial, we assessed antihypertensive effects of chronic intermittent intravenous insulin therapy (CIIIT) on insulin-dependent diabetes mellitus (IDDM) subjects with hypertension and nephropathy by monitoring the amount of antihypertensive medication (AHM) required to maintain blood pressure (BP) < or = 140/90 mmHg. RESEARCH DESIGN AND METHODS: After a stabilization period, 26 hypertensive IDDM subjects were randomly assigned to a control or treatment phase for 3 months and then crossed over into the opposite phase for another 3 months. Addition of CIIIT during the treatment phase was the only procedural difference between the control and treatment phases. RESULTS: The AHM dosage requirements for maintenance of the baseline BP levels decreased significantly (46%; P < 0.0001) and linearly over time (P < 0.0058) during the treatment phase, while remaining essentially unchanged during the control phase. CONCLUSIONS: Our data suggest that CIIIT markedly improves BP control, as evidenced by the significantly reduced AHM dosage requirements in subjects with IDDM and hypertension, possibly through an improvement in vascular reactivity.
Subject(s)
Antihypertensive Agents/therapeutic use , Diabetes Mellitus, Type 1/drug therapy , Diabetic Angiopathies/drug therapy , Diabetic Nephropathies , Hypertension/drug therapy , Insulin/administration & dosage , Insulin/therapeutic use , Adult , Aged , Blood Pressure , Cross-Over Studies , Diabetes Mellitus, Type 1/physiopathology , Dose-Response Relationship, Drug , Drug Administration Schedule , Female , Humans , Infusions, Intravenous , Injections, Subcutaneous , Male , Middle Aged , Prospective StudiesABSTRACT
The limited success achieved in controlling diabetes and its complications with conventional insulin therapy suggests the need for reevaluation of the appropriateness of insulin administration protocols. Indeed, conventional subcutaneous insulin administration produces slowly changing blood insulin levels and suboptimal hepatocyte insulinization resulting in impaired hepatic capacity for processing incoming dietary glucose. The novel approach to insulin administration known as chronic intermittent intravenous insulin therapy (CIIIT) delivers insulin in a pulsatile fashion and achieves physiological insulin concentration in the portal vein. Done as a weekly outpatient procedure combined with daily intensive subcutaneous insulin therapy, this procedure has been shown to (1) significantly improve glycemic control while decreasing the incidence of hypoglycemic events, (2) improve hypertension control, (3) slow the progression of overt diabetic nephropathy, and (4) reverse some manifestations of diabetic autonomic neuropathy (e.g., abnormal circadian blood pressure pattern, severe postural hypotension, and hypoglycemia unawareness).
Subject(s)
Blood Glucose/metabolism , Diabetes Mellitus, Type 1/drug therapy , Insulin/administration & dosage , Biomarkers/blood , Blood Glucose/analysis , Diabetic Nephropathies/blood , Diabetic Nephropathies/physiopathology , Glycated Hemoglobin/analysis , Humans , Hypoglycemia/prevention & control , Injections, Intravenous/methods , Insulin/blood , Insulin/therapeutic useABSTRACT
Studies of substrate flux, isotope activity and metabolic balance frequently require arterial sampling. We evaluated: (1) whether substrate concentrations obtained from heated dorsal hand veins (HDHV) were comparable to samples obtained from the radial artery, (2) whether heat sufficient to arterialize HDHV altered contralateral forearm blood flow thus affecting flux calculations, (3) whether a +14 heating pad equaled a cumbersome +700 heating chamber, and (4) whether HDHV showed a dose-response curve to varying heat loads. In 12 normals, dorsal hand temperature was raised from 31.8 +/- 0.6 degrees C to 39.8 +/- 0.8 degrees C (chamber) and 39.3 +/- 0.3 degrees C (pad). Basal contralateral forearm blood flow (3.37 +/- 0.7 ml/100 ml tissue/min) was not significantly altered in the chamber (3.39 +/- 0.5 ml) or the pad (3.44 +/- 0.5 ml). Skin temperature of the unheated hand, an index of superficial blood flow (31.5 +/- 0.7 degrees C) did not change significantly in the chamber (31.6 +/- 0.7 degrees C) or the pad (31.2 +/- 0.7 degrees C). Forearm blood flow did not change with heating in eight postoperative patients. Comparative arterial and HDHV blood gases and 10 metabolic substrates from simultaneously drawn samples at various temperatures showed HDHV PO2 approached but did not equal arterial PO2 at temperatures greater than 39 degrees C. Glucose, amino acid, and substrate concentrations were comparable at 39 degrees C and did not change with increasing temperature. HDHV can reliably determine arterial substrate concentrations using an inexpensive heating pad. In cool environments (20-22 degrees C), contralateral forearm blood flow is not significantly altered. There is no benefit to heating the hand above 39 degrees C.
Subject(s)
Blood Specimen Collection/methods , Hand/blood supply , Veins/physiology , Adult , Arteries , Female , Hot Temperature , Humans , Male , Middle AgedABSTRACT
OBJECTIVE: To determine retrospectively the prevalence of osteoporosis in a referral population of female patients and to compare the sensitivity for diagnosing osteoporosis by dual-energy x-ray absorptiometry (DXA) measurements of bone mineral density (BMD) at multiple skeletal sites. METHODS: We studied the data from 625 consecutive women (mean age, 57.3 +/- 13.9 years), who had been referred to our center for lumbar spine (anteroposterior [AP] and lateral region) and hip (femoral neck [FN], Ward's triangle [WT], trochanter, intertrochanteric region, and total hip) BMD measurements with use of DXA (Hologic QDR-2000) between June 1994 and July 1998. RESULTS: Osteoporosis (based on the World Health Organization definition--T-score of -2.5 or lower for BMD) was diagnosed by DXA at the following sites: AP spine in 21.7%, lateral spine in 43.2%, FN in 33.6%, WT in 49.1%, trochanter in 26.1%, intertrochanteric region in 25.9%, and total hip in 28.4% of study patients. Significant site differences were found in the prevalence of osteoporosis between the lateral and AP spine (P < 0.001), as well as between WT and the FN, trochanter, intertrochanteric region, and total hip (P < 0.001). In a subgroup of 71 women, forearm (ultradistal radius and radius 1/3 region) BMD results indicated low sensitivity for diagnosing osteoporosis, similar to that seen at the AP spine, trochanter, and intertrochanteric region. Not surprisingly, the prevalence of osteoporosis increased with advancing age (15.5% in patients younger than 50 years, in comparison with 59.6% in those older than 69 years of age). The frequency of misclassification of patients (osteoporosis at one site and normal BMD at another) with use of the seven measurement sites was 16.6% (104 of the 625 patients). CONCLUSIONS: For diagnosis of osteoporosis, DXA BMD measurements are significantly more sensitive at the lateral spine than at the AP spine, as well as at WT than at the FN, trochanter, intertrochanteric region, and total hip sites.
Subject(s)
Bone Density , Bone and Bones/diagnostic imaging , Osteoporosis, Postmenopausal/diagnosis , Osteoporosis, Postmenopausal/epidemiology , Absorptiometry, Photon , Aged , Aging/physiology , Diagnostic Errors , Female , Femur/diagnostic imaging , Humans , Middle Aged , Retrospective Studies , Spine/diagnostic imagingABSTRACT
OBJECTIVE: To assess the effects of chronic (long-term) intermittent intravenous insulin therapy (CIIIT) on the progression of overt nephropathy in patients with type 1 diabetes mellitus. METHODS: We undertook a retrospective longitudinal three-center study of 31 patients with type 1 diabetes mellitus and overt nephropathy, who were receiving intensive subcutaneous insulin therapy (four insulin injections daily) and weekly CIIIT. All study patients had follow-up consultations weekly for at least 12 months (mean duration, 37.0 +/- 4.6 months). Each patient had monthly hemoglobin A(1c) (by high-performance liquid chromatography) and semiannual creatinine clearance determinations. RESULTS: The hemoglobin A(1c) levels declined significantly from 8.6 +/- 0.6% to 7.6 +/- 0.3% (P = 0.0062) during the study period. The creatinine clearance remained essentially unchanged (from 46.1 +/- 3.0 mL/min per 1.73 m 2 at baseline to 46.0 +/- 3.9 mL/min per 1.73 m 2 at the end of the observation period, with an average annualized slope increase of 3.39 +/- 1.5 mL/min per year--no significant difference). CONCLUSION: The addition of CIIIT to intensive subcutaneous insulin therapy in patients with type 1 diabetes mellitus seems to arrest or appreciably reduce the progression of overt diabetic nephropathy, as well as substantially improve their glycemic control.