G. Polliack - Academia.edu (original) (raw)
Papers by G. Polliack
Journal of postgraduate medicine
We describe a patient with orofacial pain as the presenting symptom caused by a mandibular metast... more We describe a patient with orofacial pain as the presenting symptom caused by a mandibular metastasis from a previously undiagnosed cancer of the prostate. This possibility should be considered in the differential diagnosis of male patients presenting with orofacial pain.
Journal of the American College of Radiology, 2006
To evaluate computed tomography (CT) and magnetic resonance imaging (MRI) utilization patterns be... more To evaluate computed tomography (CT) and magnetic resonance imaging (MRI) utilization patterns before and after the implementation of a preauthorization program based on the ACR Appropriateness Criteria((R)) and the guidelines of the Royal College of Radiologists. All CT and MRI requests received at the preauthorization center and CT and MRI examinations actually performed were identified by our health care service's centralized computerized database between January 1, 2000, and December 31, 2003. The obligatory preauthorization of CT and MRI requests was established for CT in September 2001 and for MRI in February 2002. All ambulatory CT and MRI examination requests sent for approval during the study period by most of our health care physicians were included in the study. The preauthorization program model is presented, and multiple parameters were evaluated from January 2000 to December 2003, before and after preauthorization was established. Before preauthorization was required, the CT and MRI utilization rates were constantly increasing by 20% and 5% per year for CT and MRI, respectively. After preauthorization was implemented, CT and MRI annual performance rates decreased from 25.9 and 7 examinations per 1,000, respectively, in 2000 to 17.3 and 5.6 examinations per 1,000, respectively, in 2003. The decreases in the utilization of MRI and CT imaging between 2001 and 2003 were 9% (12,129 compared with 11,070 MRI examinations) and 33% (81,223 compared with 57,204 CT examinations), respectively, resulting in substantial, statistically significant cost savings. The deferral rate ranged from 7.5% to 12.2% (mean = 9.8%) for CT and 13.9% to 21.4% (mean = 17%) for MRI. Deferred cases in CT were most commonly in neuroradiology, musculoskeletal radiology, and CT angiography (ranges of deferred cases 9% to 12%, 11% to 12%, and 10% to 12%, respectively). Deferred cases in MRI were most commonly in abdominal and chest radiology (ranges of deferred cases 32% to 37% and 20% to 31%, respectively). Computed tomography was more commonly utilized inappropriately by pediatric professions, and MRI was more commonly utilized inappropriately by medical subspecialty professions. Preauthorization of CT and MRI requests results in a substantial decrease in utilization of these modalities with reduction in imaging costs.
Injury, 2022
INTRODUCTION This study describes the characteristics of hand trauma treated in community-based e... more INTRODUCTION This study describes the characteristics of hand trauma treated in community-based emergency centers (CBECs) in Israel. It was hypothesized that the rate of hand trauma, as well as patient and injury characteristics, would differ from a recent study of patients treated in hospital emergency departments (EDs) in Jerusalem. METHODS Data on all hand injury patients treated at any of the CBECs belonging to a large nationwide chain in 2017 were retrieved from the electronic medical records of the treatment centers, including demographic and clinical characteristics. RESULTS Over the course of 2017, 53,574 individuals were treated for forearm, wrist and hand injuries (35% of all trauma patients treated during this period). The majority of the patients were male (62%). Contusions and fractures were common (80%) with a minority of lacerations (10%). Crush injuries and amputations were rare. Dog bites accounted for 1.5% of the injuries under the age of 10. Females were treated more with painkillers and opioids, especially over the age of 65, with variability between centers. Although the rate of fractures was similar between teens and the elderly, the elderly were treated with immobilization less frequently, and were referred to EDs for further care. Hospital referral rates differed significantly between centers. DISCUSSION A higher rate of hand trauma was found in the CBECs in comparison to the hospital ED report (35% vs. 20% of all trauma patients, respectively). Patients treated at the CBECs, in comparison to the ED, were less often male, less often young adults, and differed in terms of type of injury. In the CBECs there were more contusions, as well as fewer lacerations and open wound injuries. In contrast, dog bites in children were found to be much more prevalent than previously reported. Hospital referral indications, the use of immobilization and pain management were found to vary according to age, gender and treatment center. Due to the high rate of hand trauma in CBECs, specific protocols are needed for these patients. The use of opioids should be specifically addressed, considering recent changes in treatment protocols. Thus, the prevalence and characteristics of hand trauma may be biased in studies based on hospital records.
Journal of postgraduate medicine
We describe a patient with orofacial pain as the presenting symptom caused by a mandibular metast... more We describe a patient with orofacial pain as the presenting symptom caused by a mandibular metastasis from a previously undiagnosed cancer of the prostate. This possibility should be considered in the differential diagnosis of male patients presenting with orofacial pain.
The European respiratory journal, 1993
A patient presented with fever, haemoptysis and large bilateral perihilar masses. Histology prove... more A patient presented with fever, haemoptysis and large bilateral perihilar masses. Histology proved that these were pulmonary artery aneurysms due to pulmonary vasculitis, as a manifestation of Behçet's disease. It is suggested that a routine dynamic computed tomographic (CT) scan should be performed in the evaluation of such cases.
Thrombosis and haemostasis, Jan 28, 1983
Dipyrone and its metabolites 4-methylaminoantipyrine, 4-aminoantipyrine, 4-acetylaminoantipyrine ... more Dipyrone and its metabolites 4-methylaminoantipyrine, 4-aminoantipyrine, 4-acetylaminoantipyrine and 4-formylaminoantipyrine inhibited the formation of thromboxane A2 (TXA2) during in vitro platelet aggregation induced by ADP, epinephrine, collagen, ionophore A23187 and arachidonic acid. Inhibition occurred after a short incubation (30--40 sec) and depended on the concentration of the drug or its metabolites and the aggregating agents. The minimal inhibitory concentration of dipyrone needed to completely block aggregation varied between individual donors, and related directly to the inherent capacity of their platelets to synthesize TXA2. Incubation of dipyrone with cultured bovine aortic endothelial cells resulted in a time and dose dependent inhibition of the release of prostacyclin (PGI2) into the culture medium. However, inhibition was abolished when the drug was removed from the culture, or when the cells were stimulated to produce PGI2 with either arachidonic acid or ionophore...
Sixty eight children were treated for ventriculoperitoneal shunt malfunction in our department du... more Sixty eight children were treated for ventriculoperitoneal shunt malfunction in our department during the years 1984-1989. Fifteen (22%) developed fever above 37.5 ~ as a presenting sign of their shunt malfunction. Physical examination did not reveal any reason for the fever. Cerebrospinal fluid, urine and blood cultures were all negative. All the children were operated upon and the malfunction corrected. Fever subsided twenty four to thirty six hours after the operation in all the patients. Fever of unknown origin in children with shunted hydrocephalus might be the first sign of a developing shunt malfunction and a neurosurgical examination should be requested.
Pediatric Radiology, 2003
Acta Neurochirurgica, 1992
Sixty eight children were treated for ventriculoperitoneal shunt malfunction in our department du... more Sixty eight children were treated for ventriculoperitoneal shunt malfunction in our department during the years 1984-1989. Fifteen (22%) developed fever above 37.5 ~ as a presenting sign of their shunt malfunction. Physical examination did not reveal any reason for the fever. Cerebrospinal fluid, urine and blood cultures were all negative. All the children were operated upon and the malfunction corrected. Fever subsided twenty four to thirty six hours after the operation in all the patients. Fever of unknown origin in children with shunted hydrocephalus might be the first sign of a developing shunt malfunction and a neurosurgical examination should be requested.
Journal of the American College of Radiology, 2006
Journal of postgraduate medicine
We describe a patient with orofacial pain as the presenting symptom caused by a mandibular metast... more We describe a patient with orofacial pain as the presenting symptom caused by a mandibular metastasis from a previously undiagnosed cancer of the prostate. This possibility should be considered in the differential diagnosis of male patients presenting with orofacial pain.
Journal of the American College of Radiology, 2006
To evaluate computed tomography (CT) and magnetic resonance imaging (MRI) utilization patterns be... more To evaluate computed tomography (CT) and magnetic resonance imaging (MRI) utilization patterns before and after the implementation of a preauthorization program based on the ACR Appropriateness Criteria((R)) and the guidelines of the Royal College of Radiologists. All CT and MRI requests received at the preauthorization center and CT and MRI examinations actually performed were identified by our health care service's centralized computerized database between January 1, 2000, and December 31, 2003. The obligatory preauthorization of CT and MRI requests was established for CT in September 2001 and for MRI in February 2002. All ambulatory CT and MRI examination requests sent for approval during the study period by most of our health care physicians were included in the study. The preauthorization program model is presented, and multiple parameters were evaluated from January 2000 to December 2003, before and after preauthorization was established. Before preauthorization was required, the CT and MRI utilization rates were constantly increasing by 20% and 5% per year for CT and MRI, respectively. After preauthorization was implemented, CT and MRI annual performance rates decreased from 25.9 and 7 examinations per 1,000, respectively, in 2000 to 17.3 and 5.6 examinations per 1,000, respectively, in 2003. The decreases in the utilization of MRI and CT imaging between 2001 and 2003 were 9% (12,129 compared with 11,070 MRI examinations) and 33% (81,223 compared with 57,204 CT examinations), respectively, resulting in substantial, statistically significant cost savings. The deferral rate ranged from 7.5% to 12.2% (mean = 9.8%) for CT and 13.9% to 21.4% (mean = 17%) for MRI. Deferred cases in CT were most commonly in neuroradiology, musculoskeletal radiology, and CT angiography (ranges of deferred cases 9% to 12%, 11% to 12%, and 10% to 12%, respectively). Deferred cases in MRI were most commonly in abdominal and chest radiology (ranges of deferred cases 32% to 37% and 20% to 31%, respectively). Computed tomography was more commonly utilized inappropriately by pediatric professions, and MRI was more commonly utilized inappropriately by medical subspecialty professions. Preauthorization of CT and MRI requests results in a substantial decrease in utilization of these modalities with reduction in imaging costs.
Injury, 2022
INTRODUCTION This study describes the characteristics of hand trauma treated in community-based e... more INTRODUCTION This study describes the characteristics of hand trauma treated in community-based emergency centers (CBECs) in Israel. It was hypothesized that the rate of hand trauma, as well as patient and injury characteristics, would differ from a recent study of patients treated in hospital emergency departments (EDs) in Jerusalem. METHODS Data on all hand injury patients treated at any of the CBECs belonging to a large nationwide chain in 2017 were retrieved from the electronic medical records of the treatment centers, including demographic and clinical characteristics. RESULTS Over the course of 2017, 53,574 individuals were treated for forearm, wrist and hand injuries (35% of all trauma patients treated during this period). The majority of the patients were male (62%). Contusions and fractures were common (80%) with a minority of lacerations (10%). Crush injuries and amputations were rare. Dog bites accounted for 1.5% of the injuries under the age of 10. Females were treated more with painkillers and opioids, especially over the age of 65, with variability between centers. Although the rate of fractures was similar between teens and the elderly, the elderly were treated with immobilization less frequently, and were referred to EDs for further care. Hospital referral rates differed significantly between centers. DISCUSSION A higher rate of hand trauma was found in the CBECs in comparison to the hospital ED report (35% vs. 20% of all trauma patients, respectively). Patients treated at the CBECs, in comparison to the ED, were less often male, less often young adults, and differed in terms of type of injury. In the CBECs there were more contusions, as well as fewer lacerations and open wound injuries. In contrast, dog bites in children were found to be much more prevalent than previously reported. Hospital referral indications, the use of immobilization and pain management were found to vary according to age, gender and treatment center. Due to the high rate of hand trauma in CBECs, specific protocols are needed for these patients. The use of opioids should be specifically addressed, considering recent changes in treatment protocols. Thus, the prevalence and characteristics of hand trauma may be biased in studies based on hospital records.
Journal of postgraduate medicine
We describe a patient with orofacial pain as the presenting symptom caused by a mandibular metast... more We describe a patient with orofacial pain as the presenting symptom caused by a mandibular metastasis from a previously undiagnosed cancer of the prostate. This possibility should be considered in the differential diagnosis of male patients presenting with orofacial pain.
The European respiratory journal, 1993
A patient presented with fever, haemoptysis and large bilateral perihilar masses. Histology prove... more A patient presented with fever, haemoptysis and large bilateral perihilar masses. Histology proved that these were pulmonary artery aneurysms due to pulmonary vasculitis, as a manifestation of Behçet's disease. It is suggested that a routine dynamic computed tomographic (CT) scan should be performed in the evaluation of such cases.
Thrombosis and haemostasis, Jan 28, 1983
Dipyrone and its metabolites 4-methylaminoantipyrine, 4-aminoantipyrine, 4-acetylaminoantipyrine ... more Dipyrone and its metabolites 4-methylaminoantipyrine, 4-aminoantipyrine, 4-acetylaminoantipyrine and 4-formylaminoantipyrine inhibited the formation of thromboxane A2 (TXA2) during in vitro platelet aggregation induced by ADP, epinephrine, collagen, ionophore A23187 and arachidonic acid. Inhibition occurred after a short incubation (30--40 sec) and depended on the concentration of the drug or its metabolites and the aggregating agents. The minimal inhibitory concentration of dipyrone needed to completely block aggregation varied between individual donors, and related directly to the inherent capacity of their platelets to synthesize TXA2. Incubation of dipyrone with cultured bovine aortic endothelial cells resulted in a time and dose dependent inhibition of the release of prostacyclin (PGI2) into the culture medium. However, inhibition was abolished when the drug was removed from the culture, or when the cells were stimulated to produce PGI2 with either arachidonic acid or ionophore...
Sixty eight children were treated for ventriculoperitoneal shunt malfunction in our department du... more Sixty eight children were treated for ventriculoperitoneal shunt malfunction in our department during the years 1984-1989. Fifteen (22%) developed fever above 37.5 ~ as a presenting sign of their shunt malfunction. Physical examination did not reveal any reason for the fever. Cerebrospinal fluid, urine and blood cultures were all negative. All the children were operated upon and the malfunction corrected. Fever subsided twenty four to thirty six hours after the operation in all the patients. Fever of unknown origin in children with shunted hydrocephalus might be the first sign of a developing shunt malfunction and a neurosurgical examination should be requested.
Pediatric Radiology, 2003
Acta Neurochirurgica, 1992
Sixty eight children were treated for ventriculoperitoneal shunt malfunction in our department du... more Sixty eight children were treated for ventriculoperitoneal shunt malfunction in our department during the years 1984-1989. Fifteen (22%) developed fever above 37.5 ~ as a presenting sign of their shunt malfunction. Physical examination did not reveal any reason for the fever. Cerebrospinal fluid, urine and blood cultures were all negative. All the children were operated upon and the malfunction corrected. Fever subsided twenty four to thirty six hours after the operation in all the patients. Fever of unknown origin in children with shunted hydrocephalus might be the first sign of a developing shunt malfunction and a neurosurgical examination should be requested.
Journal of the American College of Radiology, 2006