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Biomedical subjects

A Pezzi

Publications and source records attributed to A Pezzi.

At least 19 recordsLinked to original sources
PubMed2006

Metabolic treatment of critically ill patients: energy expenditure and energy supply.

Nutrition in critically ill patients should be considered as therapy: assessing the energy expenditure and the termogenic effect of food, and knowing the differences among composition and amount of given substrates, it is possible restore, maintain, or at least limit the derangement of energy equilibrium. Energy metabolism comprehends assumption, storage and oxidation of nutrients: all these factors could be discriminant in critical clinical conditions, particularly cardiac and respiratory failure. Then, this review would lead the decision making process beginning from biochemistry and bioenergetics, until the metabolic strategy practically usable at the bedside of patients during the whole critical phase of their pathology.

Critical Illness↗
PubMed2005

Performance determinants and flexible ICU organisation.

We faced some of the most important aspects of the problem of the appropriateness of ICU resources use, that are the relationship between volume of activity and mortality, the analysis of cost-effectiveness in intensive care medicine, and the monitoring of the human resource use in ICU. For this aim three different surveys were utilized: one at European level, the second at country level and, third, a regional survey. After developing a new measure of volume called ''high-risk volume'', we explored the relationship between outcome and volume, founding that such association was very strong (from 3 to 1719% decrease in ICU/hospital mortality every five extra high-risk patients treated per bed per year), and that an occupancy rate larger than 80% was associated with higher mortality. Therefore, patients in all levels of risk are better treated in high-risk volume ICUs with a reasonable occupancy rate. Analysing cost-effectiveness in intensive care medicine using a national case-mix categorized in different diagnostic groups, we identified brain haemorrhage, ALI/ARDS and surgical unscheduled patients as users a high volume of monetary resources less efficiently, while the scheduled abdominal surgery patients admitted to receive intensive care and patients on the ICU for minor organ support made the best use of the fewer resources spent. Finally, we designed a new approach to measure the rate and appropriateness of nursing resource use in ICU on a daily basis. Testing this approach on a group of general non-specialist ICUs, we found that the method was powerful enough to adequately distinguish between ''over'' and ''under-utilization'' and to identify all the theoretical scenarios of nurse/resource utilization.

Cost-Benefit Analysis↗
PubMed2004

Evaluating daily nursing use and needs in the intensive care unit: a method to assess the rate and appropriateness of ICU resource use.

BACKGROUND: We designed a tool to measure the rate and appropriateness of intensive care unit (ICU) nursing coverage as a proxy for the use of resources. METHODS: We tested the tool in 32 Italian ICUs during a cross-sectional study (4 days/week, October 2001 and April 2002). The level of care was classified as high or low. The appropriate patient-to-nurse ratio for both levels (2/1 and 3/1 in this ICU mix) was defined. The provided and theoretical nurse assistance was computed, the difference between the two quantifying the ICU use of personnel: a positive difference means over-utilization, a negative one under-utilization. We calculated the maximum number of high-level and low-level care days available for ICU and the relative utilization rates. These two rates quantify the appropriateness of resource use in relation to the planned use. RESULTS: Analysing 5783 treatment-days, the tool identified units using almost all available resources (five), overcrowded (14: too small units) or empty (16: too big). Units were overcrowded on account of the high-level of care required (five: utilization rate >100%) or reallocated too much of their residual high-care nursing capacity to low-level care (six). In empty units both utilization rates were lower than expected. CONCLUSIONS: The method quantifies the rate and appropriateness of resource usage and suggests the best management in units with fixed human resources or a fixed number of beds.

Cross-Sectional Studies↗
PubMed2004

Effectiveness and efficiency of intensive care medicine: variable costs in different diagnosis groups.

BACKGROUND: To establish the effectiveness of ICU treatment and the efficiency in the use of resources in patients stratified according to 10 diagnosis and two levels-of-care. To propose strategies aimed at reducing costs and improving efficiency in each patient group. METHODS: Multicentre prospective observational study. ICUs enrolled two cohorts of up to 10 consecutive patients with ICU stay >/= 48 h. Each with one of these diagnoses: trauma, brain-trauma, brain-hemorrhage, stroke, acute-on-chronic-obstructive-pulmonary disease, lung-injury/acute respiratory distress syndrome, heart failure, and scheduled/unscheduled abdominal surgery. The presence of active-life support divides high from low level-of-care treatments. Variable ICU costs were collected daily (bottom-up) for 21 days. We evaluated effectiveness (hospital survival) and efficiency (hospital-survivors variable-cost as a ratio of overall cost). RESULTS: Forty-two Italian general ICUs recruited 529 patients in 5 months. Mean ICU variable-costs significantly differed with diagnosis and level-of-care. Costs were positively affected by ICU length-of-stay, by duration of active-treatment. Outcome variably influenced costs. Medians of variable-costs per patient (1715 Euro) and patient-groups efficiencies (60.7%) identified four possible combinations between (low and high) cost and (low and high) efficiency groups. Moreover, efficiency was better than effectiveness in stroke, brain-hemorrhage and trauma, while it was worse in heart failure, acute-on-COPD or acute-lung injury. Overall ICU cost attributed only to survivors ranged from 699 (scheduled surgical) to 5906 (unscheduled surgical) Euro. Cost of non-survivors distributed to all patient was between 95 (scheduled-surgical) to 1633 (unscheduled-surgical) Euro. CONCLUSIONS: Analysis of variable patient-specific cost was used as a tool to assess intensive care performance in patient subgroups with different diagnosis and levels-of-care.

Adult↗
PubMed2004

[The assessment of nursing workload].

The measurement of nursing workload first began in the 1970s, because of the need for determining severity of illness and cost-effectiveness in the intensive care unit. In the following decades, the need for more specific tools for assessing nursing workload brought to the development of scoring systems more focused on nursing activities. We will briefly review the scoring systems validated since 1974. TISS-Therapeutic Intervention Scoring System elaborated by Cullen in 1974 is based on 57 therapeutic procedures and was designed to assess the severity of illness in the ICU. Each intervention scores 1 to 4. Patients are grouped in 5 classes. It was not sufficiently validated and was abandoned. However it first introduced the idea of "patient point managed per nurse". TISS update was elaborated by Keene in 1983. The therapeutic procedures were increased to 76. It was assumed that a single nurse can manage 40/50 points per day. Though not validated, it became the most used tool to assess complexity of treatment and nurse/patient ratio. However many of these items are obsolete and frequently related to the severity of illness rather than to specific nursing interventions. PRN-Project Research of Nursing was elaborated by EROS during 1980-1987. Points are assigned to each nursing activity according to their frequency, duration, need for more than one nurse, etc. It results quite time consuming, thus unsuitable for routine use. OMEGA elaborated in 1986 describes 86 therapeutic interventions, grouped in 3 categories, measured at the end of ICU stay, thus representing a measure of global workload and use of resources. TOSS-Time Oriented Score System was elaborated by GIRTI in 1991. This score was studied and tested in Italy. It represents a direct temporal evaluation of nursing workload. The score is expressed in minutes. It is reliable and relatively simple, and has been validated on over 2 700 ICU patients. TISS 28 was elaborated by Miranda in 1996. It represents a simplified and updated version of the original TISS, proposed to assess the nursing workload. The authors stated that a nurse can deal with 46 points over the 24 hours. NEMS-Nine Equivalents of nursing Manpower use Score was elaborated by Miranda in 1997. It was derived from TISS and TISS28. Only 9 items, related to specific organ support, nursing and diagnostic/therapeutic interventions inside or outside the ICU, are considered. These items were weighted by multivariate analysis, obtaining a score comparable to the TISS28 score. Each nurse can deal with 45/50 points per day. NAS-Nursing Activity Score was elaborated by Miranda in 2003. It was derived from TISS28, aiming at the description of nursing activities not necessarily correlated to the severity of illness. It describes 81% of the nursing time, compared to 43% of TISS 28. In conclusion, many scoring systems have been proposed to describe nursing workload, both directly (as with TOSS and PRN) or through severity and complexity of treatment (TISS, TISS 28, NAS and NEMS). These scores represent the instruments to assess the correct use of ICU resources.

Intensive Care Units↗
PubMed2003

Use of sedative and analgesic drugs in the first week of ICU stay in high-level-of-care.

AIM: The aim of this study was to update the current practice of pharmacological sedation and analgesia in Italian intensive care units. METHODS DESIGN: observational, prospective, cohort study involving consecutive patients admitted during 5 months in 1999. PATIENTS were evaluated for the first 7 days of high-level-of care. SETTING: 45 adult general intensive care units. PATIENTS: 388 fulfilling enrollment criteria: admission diagnosis out of non-traumatic cerebral hemorrage, stroke, respiratory failure in chronic obstructive pulmonary disease (COPD), acute lung injury/distress syndrome (ALI/ARDS), polytrauma, head trauma, cardiac failure and major abdominal surgery; unit stay longer than 47 hours and high-level-of care treatment. RESULTS: Sedation pattern was different among diagnosis-groups. No therapy was registered in 18.8% of overall days in polytrauma vs 67.6% of cardiac patients. Opioids supply ranged from 10.1% of overall days of acute on COPD patients vs 51.4% of polytrauma patients. Propofol was the more prescribed drug, followed by opioids and benzodiazepines. Propofol was at the top in cerebrovascular disease, ALI/ARDS and COPD; opioids in abdominal surgery and trauma, benzodiazepines in cardiac failure. The average number of prescribed drugs per day was 1.5 ranging from 1.2 on COPD to 1.7 in head trauma. CONCLUSION: Diagnosis influences the pattern of sedation-analgesia during high-level-of-care period. Sedation prevalence is reasonably prescribed in trauma groups while it remains low in ALI/ARDS, post-operative, cerebrovascular, COPD and hearth failure. Particularly opioid use remains limited in post-operative patients. This surveys shows a poorly standardised sedation approach to the different phases of the therapy: induction, short and long-term sedation phase.

Analgesia↗
PubMed2002

Description of trends in the course of illness of critically ill patients. Markers of intensive care organization and performance.

OBJECTIVE: To identify objective trends of the course of illness that might be used as benchmarks in the auditing of the organization/performance of Intensive Care Units (ICU). DESIGN: Retrospective analysis. PATIENTS AND SETTING: A group of 12,615 patients and 55,464 patient-days prospectively collected in 89 ICUs of 12 European countries. METHODS: The complexity of daily care in the ICU was classified as high (HT) or low (LT), according to six activities registered in NEMS,a daily therapeutic index for ICUs. RESULTS: Six trends of clinical course were identified: LT during the whole ICU stay (5,424 patients, mortality 1.8%); HT (3,480 patients, mortality 30.4%); HT followed by LT (2,781 patients, mortality 2.8%); LT followed by HT (197 patients, mortality 39.1%); finally, LT/HT/LT in 298 patients (mortality 10.5%); and HT/LT/HT (mortality 20.1%) in 438 patients. A group of 930 patients had the complexity of treatment increased (mortality 21.1%) and 3,711 patients received both treatments. Low-care before high-care periods had a mean duration of 2.2 +/- 3.5 days, low-care after high-care 2.7 +/- 3.1 days, and between two high-care periods 2.1 +/- 2.2 days. A group of 1,538 'surgical scheduled' patients only received LT, whereas 2,231 received HT (whether or not exclusively). Overall ICU mortality rate was low (3%) and the length of stay short, regardless of diagnosis and complexity of care received. CONCLUSIONS: The use of therapeutic indexes help to classify the daily complexity of ICU care. The classification can be used as an indicator of clinical performance and resource utilization.

Adult↗
PubMed2001

Daily classification of the level of care. A method to describe clinical course of illness, use of resources and quality of intensive care assistance.

OBJECTIVE: To develop a simple and comparable clinical method able to distinguish between higher and lower complexities of care in the ICU. DESIGN: Retrospective analysis. SETTING: Database of European ICUs Study I (Euricus-I: including 12,615 patients and 55,464 patient/days), prospectively collected in 89 ICUs of 12 European countries. METHODS AND RESULTS: A panel of experts developed the classification of the complexity of care. Six (in addition to monitoring, two levels of respiratory support--R and r--two levels of circulatory support--C and c--and dialysis) out of the nine items of Nine Equivalents of Nursing Manpower use Score (NEMS), a therapeutic index, were utilised. Two levels of care (LOCs) were defined according to a more (HT) and a less complex (LT) combination of common activities of care. The two LOCs were significantly related to mortality: higher in HT and they rose with increasing cumulative number of HT days. HT accounted for 31,976 NEMS days (57.7%) while 23,488 (42.3 %) were LT. Major respiratory and cardiovascular support accounted for about 80 % of the HT days. Respiratory assistance and monitoring were responsible for an equivalent percentage of LT days. The distribution of the clinical classification of LOCs coincided with that of the managerial scores of LOCs in the literature. CONCLUSIONS: The managerial instrument described uses simple and reliable clinical data. It is able to distinguish between patients with different severity and outcome, and shows that every additional consecutive day spent in ICU as HT increases the probability of death. Moreover, (1) it suggests the possibility of describing the clinical course of illness by relating the complexity/level of medical care to the available technology and staff; (2) using relevant markers of clinical activity, it might be useful to include in quality control programmes.

Analysis of Variance↗
PubMed1999

Small acoustic neuromas: monitoring the growth rate by MRI.

In a proportion of small acoustic neuroma patients, monitoring with magnetic resonance imaging shows no volumetric increase of tumour size over the years. The object of the study was to identify some indications for the clinical choice between immediate surgery (with the related risks) and watchful waiting. We performed a retrospective study of 47 non-surgically-treated patients affected by acoustic neuroma and monitored by gadolinium-enhanced MRI between January 1990 and February 1999. Six clinical variables (tumour size, sex, age, initial symptoms, ABR pattern and duration of the symptoms) were examined by univariate analysis. Chi-square test and variance analysis were performed to evaluate the statistical significance. In 30/47 (63.8%) cases, no growth was observed during the entire period of follow-up. In the remaining 17/47 (36.2%) patients, a volumetric increase was detected, most often within the first year of observation. The clinical factors examined did not significantly correlate with growth. Despite the relatively short period of observation, we believe that immediate surgery does not need to be considered mandatory for small acoustic neuromas, even in young patients. However the irregular behaviour of the tumour underlines the importance of monitoring with MRI at least once a year.

Adult↗
PubMed1999

[The role of radiology in assessing patients with pathological obesity submitted to modified Mason's vertical gastroplasty. A study of 322 cases].

PURPOSE: Mason's vertical banded gastroplasty (VBG) is one the most popular surgical techniques for the treatment of morbid obesity because it is effective and easy to perform and presents a low incidence of long-term complications. We report our personal results in 322 Mason's VBG patients who were followed-up radiologically. MATERIAL AND METHODS: 322 patients submitted to modified Mason's VBG underwent radiological follow-up, preferably with single contrast, to assess the shape and volume of the pouch and the presence of postoperative complications. The patients were 272 women and 50 men whose average weight was 124 kg (range: 78 to 218 kg). The women's average age was 37 years (range: 17 to 69) and the men's 36 (range: 19 to 64). We performed a double contrast examination, adapting the dosage of effervescent powders to the gastric pouch capacity, only in particular cases where a more detailed study of pouch surface was required. The examinations were performed at 1 month and 12 months postoperatively to evaluate the pouch shape and volume, in order to correlate surgical results with weight loss. Premature or unscheduled examinations were necessary only in some cases due to suspected complications or unsatisfactory weight loss. First we perform right anterior oblique projections with the patient standing, with a direct preliminary study of the epigastric region to locate the two metal clips. The patient is given barium in small swallows because large amounts might obscure the pouch by filling the fundus of the excluded stomach. Then we take left anterior oblique views to depict the neopylorus and the staple lines, and left posterior oblique projections in lateral and supine recumbency. RESULTS: We observed early postoperative complications such as pseudopylorus edema (8 patients) and intragastric hemorrhage (1 patient), and late complications such as pseudopylorus adherence to the gallbladder bed (1 patient), pseudodiverticular extroversion (1 patient), and axial enlargement (4 patients) of the pouch. The only two cases of staple-line dehiscence were both identified radiographically. In 305 patients with satisfactory weight loss no complications were observed with a pouch size of 45-70 mL (at 1 month) and 58-70 mL (at 12 months). DISCUSSION AND CONCLUSIONS: Upper gastrointestinal radiological studies permit to detect both early and late postoperative complications in Mason's VBG patients. They also provide data on the neostomach and permit to correlate the pouch volume with weight loss.

Adolescent↗
PubMed1997

Emergency medical services in mass gatherings: the experience of the Formula 1 Grand Prix 'San Marino' in Imola.

Mass gatherings are special situations for which mass medical care must be preplanned. Acute emergencies occur at public gatherings and medical coverage on site has proven benefit. Responsibility of general plan, management of specific problems, transport planning, communications system, guidelines and protocols, special situations management, ancillary supports, sources of extra help for unforeseen needs are the most important items to consider. In mass gatherings the whole emergency medical service (EMS) planning and management has to depend on the emergency department direction, with its authority on all aspects of patient care in the EMS system. This report concerns the planning of EMS and of medical care in a situation at risk for mass casualties at the Formula I Grand Prix-Championship Racing 'San Marino' of Imola.

Automobiles↗
PubMed1991

[Imaging techniques in the staging of carcinoma of the esophagus].

Forty-four patients affected with thoracic esophageal carcinoma underwent preoperative CT to evaluate the value of this method in both staging and assessing the resectability of esophageal tumors. The authors compared the CT findings with intraoperative macroscopic ones, pathologic, and bronchoscopic results in mid-high neoplasms. CT staging criteria were drawn from a careful review of literature and from personal experience. Thirty-nine patients were submitted to surgery, and esophagectomy was possible in 34 of them. CT diagnostic accuracy was higher in proximal esophageal tumors than in sub-bronchial ones; as for the surgical choice, CT provided fundamental guidelines, especially if the choice was a blunt esophagectomy where it is important to exclude tumoral involvement of the airways (accuracy: 82.6%) or of the aorta (accuracy: 89.7%). CT staging accuracy was limited by the low sensitivity of the method in detecting lymphatic (local: 66.6%, distant: 64.2%) and hepatic metastases. Combined thoraco-abdominal CT, tracheobronchoscopy and liver US, besides MR imaging and endoscopic US, allow a better preoperative evaluation of esophageal carcinomas.

Adenocarcinoma↗
PubMed1978

[Prepyloric annular diaphragm in the adult].

A case of prepyloric myo-mucosal annular diaphragm in a 47-yr-old woman with a 4-month history of subocclusion is presented. A "distal hourglass" gastric deformity was present, along with gastritis and marked spasm. The case is included in a survey of the recent literature and classed as a transitional form lying between ring diaphragm and annular hypoplasic stenosis of the antrum.

Congenital Abnormalities↗