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Transradyal yaklaşım, koroner anjiyografi (CAG) ve perkütan koroner girişim (PCI) için yeni bir yöntemdir. İlk uygulamasından bu yana popülaritesi arttı ve şimdi birçok tesiste yaygın kullanılmaktadır. Bunun nedeni, transradyal yaklaşımın, koroner arterlere kateter yerleştirilmesini gerektiren geleneksel yaklaşımdan daha az invaziv olmasıdır. Transradial erişim, girişim bölgesinde daha az komplikasyona neden olması, daha kısa hastanede kalış süresi gerektirmesi, hastanın daha erken mobilize olmasını sağlaması, daha yüksek derecede hasta konforu sağlaması ve daha düşük risk taşıması nedeniyle trans-femoral erişimden daha güvenlidir. Bu makale, koroner arterlere radyal arter yoluyla erişmenin faydalarını, kılavuzların önerilerini ve tekniğin gündeme getirdiği sorunları incelemektedir. Tüm bu konular araştırmalar ışığında tartışılmaktadır., The transradial approach is a novel method for coronary angiography and percutaneous coronary intervention. Its popularity has grown since its initial application and is now a common technique in many facilities. This is because the transradial approach is less invasive than the conventional approach, which requires catheter placement into the coronary arteries. Transradial access is safer than trans-femoral access because it results in fewer complications at the interventional site, requires a shorter hospital stay, enables the patient to be mobilized sooner, provides a higher degree of patient comfort, and carries a lower risk of significant bleeding events. This research examines the advantages of accessing coronary arteries through the radial artery, as well as the suggestions made by the guidelines and the challenges generated by the technique. All these issues were discussed in light of existing studies.

The Allen test is a simple bedside method for determining hand perfusion. Earlier studies in patients on hemodialysis (HD) found that an Allen test before access construction did not predict hand ischemia later on. The study aimed to assess whether an Allen test combined with finger plethysmography before access surgery has a potential to predict the onset of severe HD access induced distal ischemia (HAIDI).Before the first access construction in patients with chronic kidney disease, systolic finger pressures (Pdig, in millimeters of mercury) were obtained using plethysmography at rest and after serial compression of the radial and ulnar artery. A decrease in Pdig (∂Pdig) was calculated as the difference between Pdig-rest and Pdig-compression. The severity of postoperative HAIDI was graded as suggested by a 2016 consensus meeting. Patients with a severe type of HAIDI (grade 2b-4, intolerable pain, invasive treatment required) were compared with controls not having HAIDI.A total of 105 patients with chronic kidney disease (mean age 70 ± 13 years; 65% males) receiving their first access between January 2009 and December 2018 in one center fulfilled study criteria. Ten patients (10%) developed severe HAIDI at 14 ± 5 months after access construction. Before access creation, all patients with HAIDI demonstrated a radial or ulnar dominant hand perfusion pattern compared with just 57% in controls (P = .010). Compression resulted in an almost two-fold greater ∂Pdig in patients with severe HAIDI (51 ± 8 mm Hg vs 27 ± 3 mm Hg; P = .005). A 40-mm Hg ∂Pdig cut-off value demonstrated optimal tests characteristics (sensitivity of 80%, specificity of 77%, positive predictive value of 27%, negative predictive value of 97%) indicating a 10 times greater risk of developing severe HAIDI.Finger plethysmography quantifying ∂Pdig during an Allen test before access creation may identify patients who have a substantially increased risk of developing severe hand ischemia after HD access surgery.

Hand-ischemia and artery-thrombosis are serious complications of hand artery cannulation/grafting. Screening the patency of hand arteries reduces the complications. Modified Allen Test (MAT), Barbeau's test, and Doppler/Duplex-ultrasonic test screen hand arterial patency. Each of them, however, either lacks objectivity, requires subject cooperation, or is not readily available in operating rooms. In this pilot study, we aim to provide a novel, objective, reliable, and inexpensive alternative using differential photo-plethysmography (PPG) measurement, and an artery selection algorithm. For 11 participants, MAT was executed, and PPG measurements of the thumb and little fingers were recorded for left and right hands separately. For each hand, four evaluations were conducted, then fed into the artery selection algorithm. Our proposed procedure has shown congruent results with the anatomy of blood circulation. It identified two arteries in two participants causing50% blood reduction in the hand due to their occlusion. It also showed an elevated risk of accessing an artery in another 8 participants. Once the results of this study are confirmed in larger samples, the proposed procedure/algorithm may provide many indicators of the hand blood circulation, the effect of an artery occlusion on the hand, and a recommendation for selecting the best artery to access with the lowest possible complications.

Visual dysfunction in patients with macular hole is believed to occur because of cone cell displacement, often measured by the Watzke-Allen test (WAT). However, it is unknown if the horizontal and vertical measurements recorded by WAT reflect the true extent of photoreceptor displacement. This study aimed to measure the extent of photoreceptor displacement in patients with macular hole using WAT and compare the displacement value with the hole diameter measured by optical coherence tomography (OCT). This prospective, observational study at a single tertiary referral center included 43 patients with macular hole. WAT thresholds were assessed for their ability to detect macular hole. The slit was presented vertically and horizontally, and the brightness of the monitor screen was 180 cd/m2. Horizontal and vertical WAT thresholds for distortion were measured. Correlations and performance evaluations were assessed by Pearson's correlation analysis and Wilcoxon rank-sum test, respectively, between WAT threshold values and hole diameters. Horizontal and vertical WAT thresholds and diameters were compared using paired t-tests. The mean vertical WAT threshold (1.95° ± 0.87°) was significantly higher than the mean horizontal threshold (1.71° ± 0.73°; P < 0.0001). The mean minimum horizontal hole diameter (303.42 ± 111.16 mm; visual angle, 1.01°) was significantly greater than the mean minimum vertical diameter (264.12 ± 107.88 mm; visual angle, 0.88°; P = 0.0149). The minimum vertical and horizontal macular hole diameters were positively correlated with the vertical and horizontal WAT threshold values (r = 0.514, P < 0.01; r = 0.447, P < 0.01, respectively). The WAT threshold values were greater than the respective minimum macular hole diameters, indicative of cone cells displacement over an area larger than that of the hole. The difference in the extent of vertical and horizontal distortions suggests asymmetric hole formation. Hence, WAT threshold values may help evaluate visual function in patients with macular hole., Macular hole; Optical coherence tomography; Photoreceptors; Watzke-Allen test.

Post‐traumatic aneurysm of the radial artery is a rare and often misdiagnosed vascular lesion of the wrist. Radial artery ligation can lead to excellent results if Allen test confirmed that ulnar artery is the dominant feeding artery to the hand.

The Radial Forearm Free Flap (RFFF) is one of the most widely used microsurgical flaps for intraoral reconstruction. Although the Clinical Allen Test (CAT) is the most widely used preoperative diagnostic method with which to study the distal patency of the hand prior to the use of RFFF, several authors have reported potentially preventable serious vascular complications. This study included 87 consecutive patients with cancer of the oral cavity and RFFF as the flap of choice who were treated between 2010 and 2020, and compares the results of the Clinical Allen Test (CAT), the Doppler Allen Test (DAT) and the Surgical Allen Test (SAT). The preoperative vascular study found vascular abnormalities severe enough for the surgical team to change the preoperative flap of choice in 39% of patients. The Kappa index showed a weak concordance between the CAT and DAT. The study reflected a total concordance in the preoperative results of the Doppler study and the intraoperative results of the SAT. Due to its excellent agreement with SAT, the DAT would be the preoperative test of choice in patients who are candidates for RFFF. This study of vascular mapping tests with Doppler is intended to inform therapeutic decisions and present methods to gain information that cannot be obtained by physical examination alone.

The chapter starts with the indications of performing arterial blood gas analysis. Then it highlights the principal indications of performing the test. A few common conditions in which the blood gas analysis is done, are, critical illness, hypoxia, and any condition in which acid- base balance is disturbed. The importance of patient information and consent are the two steps, before doing arterial puncture. Ensuing paragraphs provide the tips on actual procedure of arterial puncture. The chapter goes further to mention the practical complications of arterial puncture such as, pain, bleeding, clotting, anxiety, and anaphylaxis to local anaesthetic agents. The importance of saving patient’s hand from ischaemic damage after the radial puncture is emphasized, in the Allen test. Inadvertent puncture of a vein instead of an artery is a common error. The difference in the arterial blood and the venous blood is explained.

Background: The modified Allen test (MAT) is a simple bedside method determining collateral hand circulation prior to hemodialysis (HD) access surgery. Hand ischemia as reflected by low systolic finger pressures ( Pdig) is associated with high mortality rates in severe kidney disease (CKD) patients. Aim of the present study was to assess a possible relation between absolute finger pressure drop (∂ Pdig) during a preoperative MAT and mortality after a first HD access construction. Methods: Pdig (systolic pressure, mmHg) was measured using digital plethysmography following compression of radial and ulnar arteries in CKD patients just before access surgery between January 2009 and December 2018 in one center. The greatest ∂ Pdig of both index fingers was used for analysis. Cardiovascular and overall mortality were assessed during the following 4 years using the ERA-EDTA classification system (codes 11, 14–16, 18, 22–26, 29). Cox regression analysis determined possible associations between ∂ Pdig and mortality. Results: Complete data sets were available in 108 patients (male n = 71; age 70 years ±12; mean follow up (FU) 1.6 years ±0.1; FU index 99% ±1). Median ∂ Pdig was 31 mmHg (range 0–167 mmHg). Patients having cardiovascular disease (CV+) demonstrated higher ∂ Pdig values (CV+ 44 ± 5 mmHg vs CV− 29 ± 3 mmHg, p = 0.012). A total of 26 patients (24%) died during FU (CV+ death, n = 16; 62%). For each 10 mmHg ∂ Pdig increase, overall mortality increased by 10%, and CV+ mortality by 15% (overall mortality: HR 1.10 [1.01–1.22], p = 0.048; CV+ mortality: 1.15 [1.03–1.29], p = 0.017). Following correction for age, ∂ Pdig remained associated with CV+ mortality (HR 1.13 [1.00–1.26], p = 0.043). Conclusions: A large drop in systolic finger pressure during a preoperative MAT is related to mortality after primary HD access surgery. The role of this potential novel risk parameter requires confirmation in a larger population.

Introduccion Mediante estudios anatomicos estaticos, se ha establecido durante anos, que la arteria cubital es dominante para la irrigacion de la mano en un 80% de los casos. Sin embargo, estudios anatomico-radiologicos mas recientes, sobre muestras poblacionales limitadas (n = 27), ponen en duda la dominancia arterial cubital unica de la mano. Por otro lado, el comportamiento funcional adaptativo, tanto de la arteria radial como de la cubital, cuando la otra arteria es obstruida, todavia no ha sido estudiado. Los objetivos del presente trabajo son: (1) Determinar si existe una dominancia arterial en la mano y (2), estudiar las variaciones del flujo que experimentan tanto la arteria radial como la cubital de voluntarios sanos, cuando la otra arteria se obstruye durante la realizacion de la prueba de Allen. Material y Metodo Se realizo un estudio observacional descriptivo transversal, sobre 200 manos de 100 voluntarios sanos. Se recogieron los datos de sexo y lateralidad. Se utilizo un ecografo doppler color para determinar, antes y durante la realizacion de un test de Allen, el diametro transversal, el area de seccion, la tasa y la velocidad de flujo, tanto de la arteria radial como de la arteria cubital. Los datos recogidos se compararon con una prueba de la suma de rangos de Wilcoxon y se realizo un analisis de correlacion mediante la prueba P de Pearson entre las diferentes variables. Resultados No se observaron diferencias significativas entre los diferentes parametros estudiados comparandolos segun la lateralidad y el genero de los voluntarios evaluados. Se evidencio una diferencia estadisticamente significativa para la tasa de flujo, area de seccion y diametro transversal entre la arteria radial y cubital, tanto en reposo como durante la prueba de Allen, siendo mayor los parametros para la arteria radial. Durante la realizacion de la prueba de Allen, se obtuvo una correlacion positiva directa entre el incremento en el diametro, tanto de la arteria radial como de la cubital, y de sus velocidades de flujo; se observo, un aumento en el area de seccion y en la tasa de flujo de ambas al ocluir la otra. Conclusiones Ha quedado evidenciado, por medio de este estudio dinamico de flujo, una dominancia de la arteria radial para la irrigacion de la mano. Tambien ha podido demostrarse que existen cambios adaptativos, anatomicos y funcionales, en la arteria cubital y radial, cuando hay ausencia de la otra. Purpose Through some static anatomical studies, it has been established for years that the ulnar artery is dominant for the hand irrigation in 80% of cases. However, more recent anatomical and radiological studies, undertaken on limited population samples (n = 27), question the unique ulnar arterial dominance of the hand. On the other hand, the adaptive functional behavior of both, the radial and the ulnar artery, when the other artery is obstructed, has not yet been studied. The purposes of this paper are: (1) To determine whether there is an arterial dominance for blood supply in the hand and (2) to study the variations in the blood flow experienced by both, the radial and the ulnar arteries of healthy volunteers, when the other artery is obstructed during the performance of an Allen test. Methods An observational cross-sectional study was performed on 200 hands of 100 healthy volunteers. Data was collected on sex and laterality of the dominant hand. A color Doppler ultrasound was used to determine, before and during the performance of the Allen test, the transverse diameter, the cross-sectional area, the rate and the blood flow velocity, both, in the radial and the ulnar artery. The collected data was compared with a Wilcoxon signed-rank test and Pearson correlation test was used. Results There were no significant differences between the different parameters studied comparing them according to the hand laterality and the gender of the evaluated volunteers. The radial artery blood flow rate, cross-sectional area and transvers diameter data were statistically significantly higher than the ulnar artery's, both, at rest and during the Allen test performance. During the Allen test performance, a direct positive correlation was obtained between the increase in the diameter of both, the radial and the ulnar artery, and their blood flow velocities; an increase in the cross-sectional area and in the blood flow rate was observed in both arteries when the other one was ocludded. Conclusions This dynamic blood flow study has evidenced a radial artery dominance of the hand. It has also demonstrated that there are some adaptive changes, both anatomical and functional, in both, the ulnar and the radial arteries, when there is an absence of the other one. This represents a dynamic system able to adapt to any present scenario.

Background: Transradial coronary angiography has established itself as safe alternative to transfemoral approach. Today, the artery of approach lies completely on the operator’s choice. The Right Radial Approach (RRA) has been a favorite for most of the interventional cardiologists due to the convenience in operating from the right side. The Left Radial Approach (LRA) has always been a neglected route. LRA does have many advantages over the right, the vascular anatomy being one of them. The aim of our study was to compare the right radial approach of diagnostic coronary angiography with left radial approach. Method: A total of 70 cases of Coronary Angiography (CAG) with normal Allen test and satisfying the inclusion criteria were prospectively observed and studied after randomly assigning them into two equal groups, LRA (Left Radial Approach) n = 35 and RRA (Right Radial Approach) n = 35. Multipurpose TIG (Tiger) catheter was used in both the approaches to catheterize the right as well as left coronary artery. Results: The access time, catheter manipulation time, procedure time, amount of contrast used, hospital stay, intensity of pain experienced, cost of the procedure and quality of coronary angiogram observed were statistically insignificant while the fluoroscopy time was slightly statistically significant which was independent to catheter manipulation time. Conclusions: The neglected Left Radial Approach to coronary angiography is as efficacious, safe and cost effective with reduction in arterial spasm complications when compared to the Right Radial Approach performed by multipurpose Tiger catheter.

Objectives: The aim of this prospective study was to evaluate muscle force of the hand, thumb, and forefinger in patients with prolonged radial occlusion after transradial percutaneous coronary procedures. Background: There are no data on hand strength and function in patients with prolonged radial occlusion after percutaneous coronary procedures. Methods: Elective patients with chronic stable angina undergoing percutaneous coronary procedures were evaluated the day before the procedure for radial artery patency, Allen test, hand grip, and thumb and forefinger pinch tests. The same measures were performed the day after the procedure and at follow-up. At follow-up, patients were divided in two groups according to the radial patency (group 1) or occlusion (group 2). Results: Of the 99 patients included in the study, 90 patients had a patent radial artery (group 1), and nine (9.1%) patients had an occluded artery (group 2). At baseline, there were no significant differences in hand grip test between the two groups (42 ± 11 kg in group 1 and 41 ± 17 kg in group 2, P = 0.74). In both groups, after the procedure, the hand grip test values was significantly reduced compared with baseline values (40 ± 11 kg in group 1, P

We investigated the impact of preoperative ultrasonography of the forearm circulation on radial artery conduit selection. Preoperative ultrasound of the forearm circulation was performed routinely in 536 patients planned for radial artery harvesting. The safety assessment of the harvest included the following algorithm of tests: the ultrasound, the Allen test, and pulse oximetry. The quality criteria that were used to exclude a radial artery from harvesting were small size of the artery, diffuse atherosclerosis, calcifications, and severe neointimal hyperplasia. The overall rejection rate due to safety reasons was 16.4%. Seventy-one (13.2%) radial arteries did not fulfill the conduit quality criteria and consequently these arteries were not harvested. In 13.4% of radial arteries, localized arterial wall disease was found in the distal third of the artery. The distal part of the artery was discarded and the rest was used as a conduit. Our results indicate that the ultrasound provides an accurate preoperative insight into the radial artery morphology, enabling selection of the arteries with favorable morphological features.

Objective: We aimed to compare the operator and patient radiation exposure in standard projections during elective diagnostic coronary angiography procedures via transradial (TRA) versus transfemoral (TFA) approaches. Methods: In this analytical cross-sectional study, a total of 202 consecutive patients who were candidates for diagnostic coronary angiography were randomized to undergo the procedure via TFA or TRA approaches (101 in each group). Patients with abnormal Allen test and history of coronary artery bypass surgery, valvular heart disease, and unsuccessful coronary angiography were excluded from the study. A single operator performed all of the procedures using a single angiography system. Patient and operator radiation exposure were measured using diamentor and an electronic personal dosimeter, respectively. Each procedure comprised a standardized sequence of projections including four standard views for the left coronary system and two standard views for the right coronary system. Results: Left anterior oblique (LAO) caudal (50°/30°) and right anterior oblique RAO (30°) projections were associated with the highest and lowest patient radiation exposure, respectively. The operator received a significantly higher radiation exposure in the TRA approach for LAO cranial (for both left and right coronary systems) and LAO caudal (for left coronary system) projections during coronary angiography compared with the TFA approach. Conclusion: Though a similar amount of patient radiation exposure in each projection was observed among TFA and TRA groups; LAO cranial and LAO caudal projections were associated with a significantly higher operator radiation exposure in the TRA group. These findings need to be considered when choosing the optimal arterial approach for patients scheduled for coronary angiography.

Objectives The aim of this study was to investigate the safety and feasibility of transradial coronary catheterization across the whole spectrum of Allen test (AT) results. Background Whether the AT can predict ischemic complications after transradial access (TRA) is controversial. No prospective assessment exists on the safety and feasibility of TRA across the whole spectrum of AT results. Methods From October 2007 to June 2009, a total of 942 patients undergoing TRA were screened, and 203 were recruited, of whom 83, 60, and 60 had normal, intermediate, and abnormal AT results, respectively. Patients underwent serial assessments of thumb capillary lactate (the primary endpoint), thumb plethysmography, and ulnar frame count to investigate the patency of the ulnopalmar arches, as well as handgrip strength tests to examine the isometric strength of the hand and forearm muscles and discomfort ratings. Results Lactate did not differ among the 3 study groups after the procedure (1.85 +/- 0.93 mmol/l in patients with normal AT results, 1.85 +/- 0.66 mmol/l in those with intermediate results, and 1.97 +/- 0.71 mmol/l in those with abnormal results; p = 0.59) or at other time points during the study. Plethysmographic readings showed improvements of ulnopalmar collateralization in patients with non-normal AT results, whereas the ulnar frame count was decreased, suggesting enhanced ulnar flow, in patients with abnormal AT results after TRA. Handgrip strength test results and discomfort ratings did not differ across AT groups. No hand ischemic complications occurred. Conclusions This study provides proof of concept for a paradigm shift in cardiovascular intervention, suggesting the safety and feasibility of TRA across the whole spectrum of AT results. Given the multiple implications of our findings, a broader clinical validation is needed. (Predictive Value of Allen's Test Result in Elective Patients Undergoing Coronary Catheterization Through Radial Approach [RADAR]; NCT00597324) (C) 2014 by the American College of Cardiology Foundation

Background and Objective The radial artery has become a routinely used conduit for coronary artery bypass graft surgery (CABG). Prior to surgery the Allen test is performed to test the patency of the ulnar artery. A positive Allen test, reperfusion >5 seconds, suggests an insufficient perfusion of the hand by the ulnar artery. In this study we investigated if laser speckle contrast analysis (LASCA) provides an objective determination of the reperfusion time. Materials and Methods When the hand is illuminated with coherent laser light, the backscattered light will result in an interference pattern consisting of bright and dark areas called speckles. This speckle pattern will change due to movement of red blood cells. LASCA uses these changes to visualize the perfusion during the Allen test. Reperfusion is measured on the palmar side of the hand. The reperfusion time is defined as the time from onset of reperfusion to maximum perfusion calculated by a polynomial curve fit. The reperfusion time of the hand of patients undergoing CABG (n = 30) is measured using LASCA and is compared to the conventional Allen test performed by the nurse practitioner. Results LASCA measurements showed a negative Allen test of both hands of 16 patients. Fourteen had a borderline reperfusion time of 5–6 seconds and/or a positive Allen test of one or both hands. No statistical significant difference was observed for the LASCA Allen test compared to the conventional Allen test, P = 0.549 for the left hand and P = 0.223 for the right hand. Conclusion LASCA is able to visualize perfusion of the hand and measure a quick, moderate, slow reperfusion response or no reperfusion. It is technically feasible to determine the reperfusion time of the hand. LASCA can be a useful and objective tool to assess ulnar collateral blood supply to the hand prior to harvesting of the radial artery as a bypass graft

The last decade has seen an increasing use of the radial artery access for coronary angiography as it combines low rates of vascular complications and early mobilization. Since its description by Campeau the percutaneous transradial access was associated with low rates of occlusion but although the incidence of ischemia is uncommon, consequences can be disastrous. That's why assessment of collateral circulation of the hand is required. Traditionally the modified Allen test was used as a tool to assess palmar arch collaterals but no consensus exists about its proper role. So the purpose of our review is to see if the modified Allen test can predict ischemic complications of the hand and if it still should be done.

We repor there on a 16-year-old patient who presented with pain and swelling in the hypothenar eminence as well as loss of sensibility in the fingers of the region innervated by the ulnar nerve; this happened 2-3 weeks after an injury by a glass splinter in his proximal palm. A pseudoaneurysm could be verified by duplex sonography. The patient wished to avoid any graft for arterial bridging for religious reasons. On the basis of an the Allen test preoperatively and the intraoperative findings, an adequate blood supply of the finger by the radial artery was expected. Thus, in respect to the patients wish, the aneurysm was resected without bridging. The patient recovered perfectly. 4 years later, an MR-angiography showed the deep and superficial transverse palmar arc to be supplied by a voluminous radial artery. The ulnar finger arteries originated from the deep arc, the radial finger arteries from the superficial arc. In this paper, the criteria pro and contra grafting the ulnar atery at Guyons's canal will be discussed.

Transradial access (TRA) is becoming widely adopted by interventional cardiologists around the world as the preferred access site for coronary diagnostic angiography and interventions. Although it was initially described >20 years ago, TRA adoption remained stagnant for a long time despite zealous

We investigated whether Allen test is necessary before transradial approach. Transradial approach has been feasible and effective for cardiac and other vascular interventions in recent years. Most operators use a modified Allen test due to known collateral circulation in the hand; however, the

An 83-year-old woman with a suspected coronary atherosclerotic disease in the setting of severe left ventricular dysfunction underwent a coronary angiography at our institution. Prior to catheterisation, Allen test was performed, which showed normal bilateral circulation. Using a 5 Fr catheter sheath through the right radial artery, we found a guide wire blockage at the axillary artery level. Recanalisation of prior arterial occlusion with collateral …

Arteri radialis semakin sering dipergunakan sebagai akses alternatif angiografi koroner dan intervensi karena dibanding akses femoralis, komplikasi perdarahan lebih rendah, mobilisasi lebih dini, dan biaya lebih murah. Terdapat beberapa hal yang dapat mengurangi keberhasilan prosedur ini; salah satunya ialah kegagalan pungsi karena ukuran a. radialis yang kecil. Studi sebelumnya menunjukkan bahwa uji Allen dapat digunakan untuk mendeteksi arteri dengan diameter yang lebih besar. Penelitian ini bertujuan untuk mengevaluasi apakah uji Allen dan inverse Allen berkorelasi dengan diameter a. ulnaris dan a. radialis. Penelitian ini berlangsung dari Juli hingga Desember 2012 di Laboratorium Kateterisasi Rumah Sakit Awal Bros Makassar. Pasien menjalani uji Allen dan inverse Allen sebelum prosedur. Ukuran diameter dalam dari lumen arteri radialis dan ulnaris diukur oleh operator dengan menggunakan analisis angiografi kuantitatif (operator tidak mengetahui hasil uji Allen). Uji Spearman’s rho digunakan untuk menganalisis korelasi antara uji Allen dan inverse Allen dengan diameter a. radialis dan a. ulnaris dengan P < 0,05 dianggap bermakna. Analisis statistik menggunakan SPSS versi 19. Hasil penelitian memperlihatkan 121 pasien (98 laki-laki dan 23 perempuan, rerata usia 57,5 (SD ± 11,9 tahun). Frekuensi c rossover 3,3%. Uji Allen dan inverse Allen normal pada 116 pasien (95,8%). Rerata diameter a. radialis dan ulnaris ialah 2,14 (SD ± 0,34 mm) dan 1,95 (SD ± 0,45 mm). Uji korelasi Spearman’s rho menunjukkan korelasi bermakna antara uji Allen dan diameter a. ulnaris ( P = 0,000; r = -0,485); uji inverse Allen dan diameter a. radialis ( P = 0,015; r = -0,220). Simpulan: Terdapat korelasi bermakna antara uji Allen dengan diameter a. ulnaris, dan uji inverse Allen dengan diameter a. radialis. Kedua uji ini sederhana dan dapat memberikan informasi tentang arteri mana memiliki diameter yang lebih besar. Bila uji Allen normal, maka a.ulnaris dapat dipergunakan sebagai akses alternatif ketika akses radialis gagal atau bahkan sebagai akses inisial jika uji inverse Allen abnormal atau waktu uji Allen lebih singkat dari inverse Allen, terutama untuk prosedur intervensi yang memerlukan arteri yang lebih besar sebagai akses. Kata kunci: uji Allen, uji inverse Allen, diameter, arteri radial, arteri ulnaris. Abstract: Radial artery has been increasingly used as an alternative site for coronary angiography and intervention because of its advantages over femoral access, such as: a reduction in bleeding complications, early mobilisation, and lower cost. Despite these advantages, there are some challenges that reduce procedural success. One of them is the puncture failure owing to the small vessel size. A previous study has demonstrated consistently that the Allen test may be used for detecting the artery with the largest diameter. This study aimed to evaluate whether the Allen’s and inverse Allen’s tests correlate to the diameters of ulnar and radial arteries. This study was conducted from July to December 2012 in the Catheterization Laboratory of Awal Bros Hospital Makassar. Patients underwent the Allen’s and inverse Allen’s test before the procedure. The inner luminal diameters of radial and ulnar arteries were measured by an operator using quantitative angiographic analysis software. The operator was blinded to the results of the Allen’s tests. The Pearson correlation test was used to analyze the correlation between Allen’s and inverse Allen’s test with the diameters of the radial and ulnar arteries. A P- value of < 0.05 was considered as statistically significant. Statistical analysis was performed with Statistical Package for Social Sciences (SPSS) version 19. The results showed that t here were 121 patients (98 males and 23 females, the mean age being 57.5 (SD ± 11.9 years). The crossover rate was 3.3%. Both of the Allen’s and inverse Allen’s tests were normal in 116 patients (95.8%). By using a quantitative coronary analysis software, the mean diameters of the radial and the ulnar arteries were 2.14 (SD ± 0.34 mm) and 1.95 (SD ± 0.45 mm), respectively. The Spearman’s rho correlation test showed significant correlations between the Allen’s test and diameters of ulnar arteries ( P = 0.000; r = -0.485), and between the inverse Allen’s test and diameters of radial arteries ( P = 0.015; r = -0.220). Conclusion: The Allen’s test correlated to the diameters of the ulnar arteries and the inverse Allen’s test correlated to the diameters of the radial arteries. The normal Allen’s test indicated that the ulnar artery might be used as an alternative access site when the radial approach failed or even as an initial access if the inverse Allen’s test was abnormal or the Allen’s test was shorter than the inverse Allen’s test, especially for the intervention procedure which needed a larger artery as the access site. These tests are simple and may provide some important information about arteries with larger diameters. Future studies with larger series of patients will be necessary to confirm our results. Keywords : Allen’s test, inverse Allen’s test, diameter, radial artery, ulnar artery.