שרון ארליך(1), דלית מודן(1) וגדעון פרת(2)

(1) היח' לאנדוקרינולוגיה, (2) המח' לטיפול נמרץ ילדים, מרכז רפואי שיבא, תל-השומר, רמת-גן

לפטין הוא חלבון בעל 167 חומצות-אמינו ומשקלו המולקולתי הוא כ-16kDa. שמו נגזר מהמלה היוונית leptos, שמשמעותה "רזה". ללפטין מספר תפקידים, שהעיקרי ביניהם הוא ויסות מאזן האנרגיה על ידי דיכוי תיאבון והגברת הוצאת אנרגיה. כמו-כן, הוא מהווה סמן למאכת הרבייה וכהורמון המשפיע על מיגוון תהליכי חילוף-חומרים, כגון הפרשת אינסולין וליפוליזה. קיימות עדויות לכך, שללפטין יש גם תפקיד מרכזי בתגובה למצבי דחק והוא מצוי ביחסי גומלין הדוקים עם ציר ההיפותאלאמוס-היפופיזה-טוחה (adrenal). המטרה בסקירה זו לסכם בקצרה את הידע הקשור בלפטין, בהסתמך על הספרות העכשווית.

אשר ברק(1), אורי אפרתי(1), מרדכי ר' קרמר(2)

היחידה למחלות ריאות ילדים, בי"ח שיבא תל-השומר(1), המכון למחלות ריאה: מרכז רפואי ע"ש רבין, פתח תקווה(2)

בשנים האחרונות, התפתח הסיווג של מחלות דרכי הנשימה הקטנים: הסימפונונים (bronchioles). מגוון המחלות והגורמים הרבים והמשותפים לחלקם, גורמים לא פעם לבלבול. מחלות הסימפונונים מסוג ברונכיוליטיס חסימתי (bronchiolitis obliterans – ב"ח) וברונכיוליטיס חסימתי עם דלקת בהתארגנות (bronchiolitis obliterans with organizing pneumonia – בחד"ה). מהווה סיבות חשובות למחלות ריאה מפושטות והסננתיות. ההכרה בהבדלים שבין שתי תיסמונות אלו מאפשרת קביעת פרוגנוזה וטיפול מתאים לחולה. בסקירה ספרותית זו מדווח על המיבנה האנטומי של הסימפונונים, הסיווג הפתולוגי והקליני של מחלות הסימפונונים. מושם דגש על המשותף והשונה שבמחלות ב"ח ובחד"ה: מהלך קליני, בדיקות רנטגן, טיפול ופרוגנוזה של כל אחת ממחלות אלו.

The Sixth Vital Sign: End-Tidal Co² in Pediatric Trauma Patients during Transport

Amir Vardi, Inbal Levin, Gideon Paret, Zohar Barzilay

Pediatric Transport Team of the Pediatric Critical Care Unit, Sheba Medical Center, Tel Hashomer; and Sackler School of Medicine, Tel Aviv University

Transport of pediatric trauma victims, within as well as between medical centers, has become a frequent event and an integral activity of pediatric critical care units. Monitoring patients during transport is of utmost importance, as an unstable environment poses an increased threat to the patient's stability. The level of monitoring and care should approximate that of the critical care unit. Monitoring end-tidal CO² (EtCO²) has become routine for many pediatric intensive care unit patients but technical problems have limited its use during transport.

Our transport team uses a transportable EtCO² monitor of the side-stream type (NPB 75), requiring very small samples; midstream sampling overcomes humidity interference. The monitor is small and lightweight, operates on a rechargeable battery and is especially designed for the demanding environment of transport.

From October 1997 through January 1999, 187 pediatric patients, 62 of whom were trauma victims, were transported for a total of 45 hours, including 2 hours of in-flight transport. Age range was 3 months to 16 years. Of the 53 monitored for EtCO², in 9 (17%) monitoring resulted in a significant, immediate change of treatment during transport.

We find EtCO² an important adjunct in monitoring pediatric trauma patients during transport. In addition to conventional monitoring of heart rate, blood pressure, respiratory rate, body temperature and blood oxygen saturation, we suggest EtCO² as the sixth vital sign that should be monitored.

Tacrolimus does not Accentuate Hepatic Damage due to Hypoperfusion 

Ron Ben Abraham, Ivgeni Isartal, Richard Nakache, Vallery Rudick, Daniel Ogorek, Gideon Paret, Avi Weinbroum

Dept. of Anesthesiology and Critical Care Medicine, Organ Transplantation and Postoperative Care Units, Tel Aviv-Sourasky Medical Center; and Pediatric Intensive Care Units, Sheba Medical Center, Tel Hashomer; and Sackler Faculty of Medicine, Tel Aviv University

Deterioration of hepatic function following liver transplantation is a known complication, sometimes attributed to the use of cyclosporin A. Reaction to tacrolimus (Prograf), a relatively new and effective immunosuppressant drug, is thought to result in a much lower grade of organ dysfunction, especially in the transplanted liver.

Using the ex-vivo rat model of isolated perfused liver, we evaluated hepatocellular damage and oxygen extraction when tacrolimus was administered following liver hypoperfusion. Tacrolimus did not worsen hepatic dysfunction caused by the hypoperfusion. Therefore using tacrolimus in the perioperative period might be safer than cyclosporin A, which tends to worsen hepatic damage in the presence of hypoperfusion.

Pulmonary Involvement in Osler- Weber-Rendu Syndrome 

Efrat Bron-Harlev, Benjamin Zeevi, Ben-Zion Garty

Dept. of Medicine B and Cardiac Catheterization Unit, Schneider Children's Medical Center, Petah Tikva

Hereditary hemorrhagic telangiectasia (Osler-Weber-Ren-du syndrome) is a group of autosomal dominant diseases with variable penetration, characterized by vascular malformations. Recently hereditary hemorrhagic telangiectasia has been found to be a phenotypic expression of mutations in genes located on chromosomes 9 and 12, and possibly of other genes located on other chromosomes.

We describe 2 patients with hereditary hemorrhagic telangiectasia and pulmonary involvement who presented with repeated complaints of dyspnea and cyanosis and were diagnosed as having long-standing asthma. Both were treated with therapeutic catheterization and embolization with good clinical outcomes.

Laser Treatment of Airway Obstruction in Infants and Children

Y. Efrati, S.M. Sarfaty, S. Kromholz, G. Eshel, M. Weinberg, I. Vinograd

Depts. of Pediatric Surgery, Otolaryngology, Anesthesia and Pediatric Intensive Care, Assaf Harofeh Medical Center, Zerifin (Affiliated with Sackler Faculty of Medicine, Tel Aviv University)

Airway obstruction during infancy and childhood requiring surgical ablation is rare, and surgical intervention poses a significant challenge. During recent decades, appropriate endoscopic instrumentation, together with advanced laser beam technology have provided new operative modalities for such patients.

From 1993 to 1995 we treated 40 infants and children, 26 males and 14 females, 13 days to 11 years old (mean 3.3 years) with Nd-YAG or CO² laser. Obstructing lesions included granulation tissue or polyps (16 cases), septa or webs (27), or benign tumors (4). 7 had more than a single lesion.

All were treated endoscopically under general anesthesia without any operative or postoperative deaths. Surgical intervention removed the obstruction and related symptoms in 34. In 6, laser treatment failed, necessitating additional surgical procedures. 3 had circumferential subglottic web. Operative complications included bleeding during removal of a hemangioma in 1 and recrudescence in another. Postoperative complications were transient respiratory failure and pneumonia in 6, all of which resolved with appropriate treatment.

This series proves that laser technology is feasible in the treatment of airway obstruction during infancy and childhood, and is safe and effective.

Multicenter Community-Based Trial of Amlodipine in Hypertension

C. Yosefy, J.R. Viskoper, Y. Leshem, Y. Rav-Hon, G.I. Rosenberg, E. Yaskil

(Representing the 39 Investigators of Project AML-IL-95-001, WHO Collaborative Center for Prevention of CV Diseases) Ben-Gurion University of the Negev, Beer Sheba; Barzilai Medical Center, Ashkelon; Hypertension Clinic, Kupat Holim Afula; Statistics Consulting Unit, Haifa University; and Promedico Ltd., Petah Tikva

The safety and efficacy of Amlodipine (AML) for mild to moderate hypertension was evaluated in a "real life" setting. This open non-comparative trial included 123 men and 143 women (age 30-91 years, mean 59.4). All had sitting diastolic blood pressure (DBP) between 95 and 115 mmHg, confirmed in most by 2 baseline measurements, 2 weeks apart.

Eligible patients were given AML 5 mg daily as add-on or monotherapy and were evaluated 4 weeks later. If DBP was then >90 mmHg, the daily dose was raised to 10 mg; those with <90 mmHg remained on 5 mg. AML was continued for 8 weeks. Other BP-lowering drugs were unchanged.

Of the original 266 patients 22 (8.2%) withdrew due to adverse events (AE), and others were protocol violators, lost to follow-up or withdrew, leaving 211 available for efficacy analysis. In this major group BP was reduced from 165±15/101±4 to 139±11/83±5 after 12 weeks of AML (p<0.05). The reduction was greater in those under 70 years, from 173±12/100±5 to 142±12/80±4 (p<0.05). In those with BMI>30 kg/m², BP decreased from 165±15/101±5 to 140±12/83±5 (p<0.05).

Mean change in heart rate was -1.5 bpm (p<0.05). Mean final AML dose was 5.5 mg/day. The most common AML-related AE requiring cessation of the drug was pedal edema in 2.6% of the 266 patients; in 3.7% it persisted during therapy. Other AE occurring in >1% were dizziness in 1.8%, headache 1.5%, flushing 1.1% and fatigue 1.1%.

We conclude that AML is an effective and well-tolerated antihypertensive suitable for most hypertensive patients.

Prognostic Implications in Pediatric Head Injuries

Gideon Paret, Ron Ben Abraham, Susana Berman, Amir Vardi, Rami Harel, Yossi Manisterski, Zohar Barzilay

Depts. of Pediatric Intensive Care and of Anesthesiology and Intensive Care, Sheba Medical Center, Tel Hashomer and Sackler Faculty of Medicine, Tel Aviv University

An unselected series of 200 consecutive cases of major head trauma in children aged 6 months to 16 years, seen during 4 years, was studied. Injuries were due to road accidents (40%), falls (30.5%) and other causes (29.5%), and were assessed clinically and by cranial CT.

On admission the Glasgow Coma Score ranged from 4.72-11.65 and in addition to pupillary responses and brain stem reflexes, was a significant predictor of outcome. Brain edema, midline shift, intracranial hemorrhage and also hyperglycemia, hypokalemia and coagulopathy, were associated with poor outcome. While 17% died, 53% were discharged in good functional condition.

Early identification of clinical features related to prognosis can help the caring team provide maximal support for patient and family.

Intrahospital Transport of Critically Ill Children

Gideon Paret, Ron Ben Abraham, Oshrat Yativ, Amir Vardi, Zohar Barzilay

Dept. of Pediatric Intensive Care and of Anesthesiology, Sheba Medical Center, Tel Hashomer and University of Tel Aviv

Prospective evaluation of intrahospittransportation of 33 critically ill children to and from the pediatric intensive care unit was conducted over the course of a month. Factors contributing to risk of transport were assessed.

There were 33 children (25 boys and 8 girls), 3 days to 15 years of age. Reasons for admission included: disease and trauma in 19, and status post operation in 11. The pretransport PRISM score was 4.84. 22 children (66.6%) were being mechanically ventilated and 10 (30.3%) were being treated with amines. Transport time ranged from 8-150 minutes. 15 of the transports (45.4%) were urgent and a special intensive care team escorted 22 (66.6%). Equipment mishaps and physiolog-ical deterioration occured in 12 (36.3%) and 11 (30.3%) of the cases, respectively. The use of amines, mechanical ventilation, longer transport time and high PRISM score were all associated with physiological deterioration on transport.

Israel's ATLS Program: Summary and Outlook

Ron Ben Abraham, Michael Stein, Yoram Kluger, Gideon Paret, Avraham Rivkind, Joshua Shemer

Medical Dept., Israel Defense Forces and Israel Trauma Society

In recent years a vigorous effort has been made to improve quality of primary trauma care in Israel. Advanced trauma life support courses (ATLS) were given to physicians throughout the country, regardless of their specialties. In 7 years 4229 physicians participated in 202 courses with an average success rate of 76%. In the future, issues such as mandatory vs. voluntary training, language barriers, and continuous decline of knowledge should be addressed if momentum is to be maintained.

Percutaneous Ablation of Malignant Kidney Tumors in Rabbits by Low Frequency Radio Energy

Boaz Moskovitz, Ofer Nativ, Edmond Sabo, Yousef Barbara, Daniel Mordohovich, Yoseph Kaftori, Arie Shalhav, Benad Goldwasser

Bnai-Zion Medical Center and Bruce Rappaport Faculty of Medicine, The Technion, Haifa

Radio-frequency (RF) current has been used successfully to ablate normal human tissue. To investigate further the clinical application of this modality in tumors, we studied the potential of using RF percutaneously to destroy experimental kidney tumors. 35 outbred albino rabbits underwent direct-implantation of renal VX2 tumor during open surgery. After 21 days, ultrasonography was performed to show tumor presence and size. A shielded RF needle was designed to be inserted percutaneously through an introduction needle. An electrical insulation shield covering the RF needle was retractable, controlling the length of exposure of the RF needle inside the tissue. 22 days after tumor implantation, RF was applied via this special needle using a ZoMed International RF generator. In one group of rabbits the procedure was performed under direct vision during open surgery, while in another group treatment was percutaneous, the needle guided by palpation of the tumor. Rabbits were killed 3 days later and revealed 4-25 mm intra-tumoral RF-induced lesions. A direct relation was found between lesion size and the power and duration of RF applied (at 7.5 W, R=0.48, and P=0.32). Based on our preliminary results we can conclude that RF may have clinical applications in the near future for percutaneous local tumor control in parenchymal organs.

ATLS Course for Surgery Residents - Should it be Mandatory?

Ron Ben-Abraham, Michael Stein, Yoram Kluger, Gideon Paret, Avraham Rivkind, Joshua Shemer

Medical Corps, Israel Defense Forces; Sourasky Medical Center and Chaim Sheba Medical Center, Sackler School of Medicine, Tel Aviv University; and Hadassah Medical Center, Jerusalem

Senior surgeons were asked about mandatory participation of general surgery residents in the advanced trauma life support (ATLS) course. Although trauma care in Israel is given by surgical residents, in the opinion of their senior mentors the course should continue to be mandatory for them.