• Journal of Sensor Science and Technology
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• v.26 no.2
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• pp.135-140
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• 2017

In this paper, a novel measurement method of radial artery pulse waveform using robotic applanation tonometry (RAT) was present to reduce the errors by the pressing direction of the vessel. The RAT consisted of an array of pressure sensors and 2-axis tilt sensor, which was attached to the universal joint with a linear spring and five-DOF robotic manipulator with a one-axis force sensor. Using the RAT mechanism, the pulse sensor could be manipulated to perpendicularly pressurize the radial artery. A pilot experimental result showed that the proposed mechanism could find the optimal pressurization angles of the pulse sensor within ${\pm}3^{\circ}$standard deviations. Coefficient values of variation of maximum pulse peaks extracted from the pulse waveforms were 4.692, 6.994, and 11.039 % for three channels with the highest magnitudes. It is expected that the proposed method can be helpful to develop more precise tonometry system measuring the pulse waveform on the radial artery.

• Journal of Chest Surgery
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• v.46 no.3
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• pp.165-177
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• 2013

This is the third in a series on coronary artery bypass which reviews three alternative arterial conduits. The radial artery has become the most widely used of the three and accumulating experience demonstrates better patency at 10 years versus saphenous vein. Drawbacks are a long incision on the forearm, the propensity for spasm and persistent sensory disturbance in about 10%. The first is answered by endoscopic harvest which may yield a shorter conduit but reduces sensory nerve injury. Spasm is managed pharmacologically and by less harvest trauma. The gastroepiploic artery is used in situ and free and although the abdominal cavity is entered complications are minimal and patency compares favorably with the radial artery. Use of the inferior epigastric artery remains minimal and its similar length often requires composite use but limited patency data are supportive. Other arteries have had rare use and this is unlikely to change because the three presented here have significant advantages and acceptance.

• Korean Journal of Acupuncture
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• v.19 no.1
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• pp.15-23
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• 2002

This study was carried to identify the component of Large Intestine Meridian Muscle in human, dividing into outer, middle, and inner part. Brachium and antebrachium were opened widely to demonstrate muscles, nerve, blood vessels and the others, displaying the inner structure of Large Intestine Meridian Muscle. We obtained the results as follows; 1. Meridian Muscle is composed of the muscle, nerve and blood vessels. 2. In human anatomy, it is present the difference between a term of nerve or blood vessels which control the muscle of Meridian Muscle and those which pass near by Meridian Muscle. 3. The inner composition of meridian muscle in human arm is as follows. 1) Muscle; extensor digitorum tendon(LI-1), lumbrical tendon(LI-2), 1st dosal interosseous muscle(LI-3), 1st dosal interosseous muscle and adductor pollicis muscle(LI-4), extensor pollicis longus tendon and extensor pollicis brevis tendon(LI-5), adductor pollicis longus muscle and extensor carpi radialis brevis tendon(LI-6), extensor digitorum muscle and extensor carpi radialis brevis mucsle and abductor pollicis longus muscle(LI-7), extensor carpi radialis brevis muscle and pronator teres muscle(LI-8), extensor carpi radialis brevis muscle and supinator muscle(LI-9), extensor carpi radialis longus muscle and extensor carpi radialis brevis muscle and supinator muscle(LI-10), brachioradialis muscle(LI-11), triceps brachii muscle and brachioradialis muscle(LI-12), brachioradialis muscle and brachialis muscle(LI-13), deltoid muscle(LI-14, LI-15), trapezius muscle and supraspinous muscle(LI-16), platysma muscle and sternocleidomastoid muscle and scalenous muscle(LI-17, LI-18), orbicularis oris superior muscle(LI-19, LI-20) 2) Nerve; superficial branch of radial nerve and branch of median nerve(LI-1, LI-2, LI-3), superficial branch of radial nerve and branch of median nerve and branch of ulna nerve(LI-4), superficial branch of radial nerve(LI-5), branch of radial nerve(LI-6), posterior antebrachial cutaneous nerve and branch of radial nerve(LI-7), posterior antebrachial cutaneous nerve(LI-8), posterior antebrachial cutaneous nerve and radial nerve(LI-9, LI-12), lateral antebrachial cutaneous nerve and deep branch of radial nerve(LI-10), radial nerve(LI-11), lateral antebrachial cutaneous nerve and branch of radial nerve(LI-13), superior lateral cutaneous nerve and axillary nerve(LI-14), 1st thoracic nerve and suprascapular nerve and axillary nerve(LI-15), dosal rami of C4 and 1st thoracic nerve and suprascapular nerve(LI-16), transverse cervical nerve and supraclavicular nerve and phrenic nerve(LI-17), transverse cervical nerve and 2nd, 3rd cervical nerve and accessory nerve(LI-18), infraorbital nerve(LI-19), facial nerve and infraorbital nerve(LI-20). 3) Blood vessels; proper palmar digital artery(LI-1, LI-2), dorsal metacarpal artery and common palmar digital artery(LI-3), dorsal metacarpal artery and common palmar digital artery and branch of deep palmar aterial arch(LI-4), radial artery(LI-5), branch of posterior interosseous artery(LI-6, LI-7), radial recurrent artery(LI-11), cephalic vein and radial collateral artery(LI-13), cephalic vein and posterior circumflex humeral artery(LI-14), thoracoacromial artery and suprascapular artery and posterior circumflex humeral artery and anterior circumflex humeral artery(LI-15), transverse cervical artery and suprascapular artery(LI-16), transverse cervical artery(LI-17), SCM branch of external carotid artery(LI-18), facial artery(LI-19, LI-20)

• Journal of Chest Surgery
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• v.32 no.10
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• pp.891-896
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• 1999

Increasing interest in the use of arterial conduites is based on the better patency of the internal thoracic artery(ITA) than the saphenous vein graft and the hope that other arterial conuits will perform similarly over the long term. Material and Method: Between May 1997 and July 1998, 43 patients underwent coronary artery bypass grafting with ITA and the radial artery(RA). There were 28 men and 15 women with a mean age of 61.5 years(range, 35 to 78). In 43 patents, 30 bilateral ITA(including 7 diabetes mellitus, 5 more older 70 years), 8 bilateral ITA only, 2 left ITA and both RA, 11 left ITA and left RA and 22 both ITA and left RA were used. Result: There was 1 hospital mortality. Of the 42 patients alive, 39 patients are asymptomatic. Postoperative complications were postoperative bleeding in 1 patients, and low cardiac output syndrome in 3. Follow-up angiography was performed in 5 patients after the operation(mean 3 months), and all ITA & RA grafts showed excellent results. Conclusion: We conclude that complete arterial revascularization with internal thoracic artery and radial artery is technically feasiale with low mortality and morbidity, and but long term follow-up is needed.

• Journal of Chest Surgery
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• v.30 no.3
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• pp.275-281
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• 1997

The radial artery as a graft for myocardial revascularization was introduced by Carpentier in the early 1970s. Mid-term results were unfortunately discoura ing, and the clinical experience with this graft was interrupted. At the end of the 1980s, these authors reproposed the same arterial conduit with more satisfying results, because of improved technique and pharmacological management of the graft. Between October 1994 and July 1995, 36 patients underwent myocardial revascularization with a radial artery graft in Seiong General Hospital. Left internal mammary artery was concomitantly used as a pedicled Vift in 34 patients. Fifteen patients (42%) had a complete arterial waft revascularization. A total of 12) distal anastomoses were performed (average 3.4 per patient), including 36 left internal mammary artery wafts (two sequential in 2 patients), and 23 saphenous vein grafts. The remaining 64 distal anastomoses were perFormed with radial artery grafts (mean 1.8 per patient). The radial arteries were anastomosed to the circumflex (n=38), diagonal (n= 18), right coronary(n=G), and left anterior descending coronary artery(n=2). The percent ge of radial artery graft anastomoses (64) to the total anastomoses(123) was 52%. The radial artery was used as a single graft in 10 patients, as a sequential graft in 25 patients, and two grafts in 1 patient. Twenty patients underwent associated procedures coronary endarterectomy (14), coronary artery patch angioplasty (4), mitral valve repair (1), and repair of ventricular septal rupture (1). One patient died of low cardiac output syndrome and the others had no perioperative myocardial infarction. There are no ischemic and functional complications in the arm or hand aftcr removal of the radial artery. Only 1 patient required reexploration of the am, for the hematoma evacuation, and 2 patients complained transient thumb dysesthesia of the side of the havested arm. This dysesthesia improved within one month. Postoperative angiovaphic controls were obtained in 11 patients(31%) postoperative 79 to 210 days (mean 126 days). The patency rate were as follows : left internal mammary artery (100%), saphcnous vein (100%), and radial artery(95%). We concluded that the radial artery is useful alternative graft, but long term clinical and angiographic studies are required to derterminc whether wider application is warranted.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.57 no.12
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• pp.2351-2357
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• 2008

Noninvasive radial artery pulse wave has been widely used not only for the pulse wave analysis(PWA) itself but also for assessment of arterial stiffness with estimated aortic pulse wave from peripheral pulse wave. However, it has been found that the deformation of pulse shape can be caused readily by changing measuring position, indentation pressure, and so on. So, in this study, we have developed a system which can measure radial pulse wave and skin displacement simultaneously while the indentation body goes down to occlude subject's radial artery. This system can be divided into a measuring apparatus part, an indentation control hardware part, a data acquisition part and a control and computation part. And, the measuring apparatus consists of an arm-rest, a step motor, an indentation body, a laser displacement sensor(LK-G30, Keyence Co.) and pulse wave sensor. Under load-free condition and radial artery loaded condition, the evaluation of developed system has been performed. From these results, we can conclude: 1) The developed system can control the indentation body quantitatively and the adopted laser displacement sensor shows linear output characteristic even with skin as a reflector. 2) This system can measure the pulse wave and the displacement of indentation body, that is, skin displacement simultaneously at each specific level of indentation body. 3) This system can provide the number of motor steps used to get down the indentation body, the measured skin displacement, the calculated indentation pressure, the calculated pulse pressure and the pulse waveform as well as the information generated by combining these with each others. 4) This system can reveal the relationship between the morphological changes of pulse wave and the estimated displacement of radial artery wall by indentation. Consequently, the developed system can furnish more abundant information on radial artery than previous diagnosis systems based on tonometric measurement. In further study, we expect to setup the standard measuring process and to concrete the algorithm for the estimation of radial artery's diameter and of displacement of radial artery's wall. Furthermore, with well designed clinical studies, we hope to turn out the usefulness of developed system in the field of cardiovascular system evaluation.

• Journal of Chest Surgery
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• v.40 no.8
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• pp.546-551
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• 2007

Background: The radial artery is gaining widespread acceptance as complementary arterial conduits for surgical myocardial revascularization, but there have been limited reports about its angiographic patency compared with that of internal thoracic artery or saphenous vein. We tried to evaluate angiographic patency of radial artery graft and to compare that of radial artery and other gratis with retrospective manner. Material and Method: From January 2001 to Jure 2006, totally 132 patients (male 92, female 40) who underwent coronary artery bypass graft using radial artery were re-admitted to our hospital for follow up angiographic examination. Mean age was 58.2+8.87 and mean follow up duration was 32 month ($2{\sim}110$ month). Off pump and on pump bypass surgery were performed 74 and 58 patients respectively. Along with radial artery, left internal thoracic arteries were used in 57 cases, concomitant left internal thoracic artery and saphenous veins were used in 47 cases and bilateral internal thoracic arteries were used in 20 cases. Result: Totally 412 distal anastomosis were performed and 376 anastomosis remained patent (91.2%). Left internal thoracic artery showed the most excellent patency in all of the conduits (98.5%). Radial artery graft patency was 90.8% (169/186). There was no statistical difference of the patency by conduit between on-pump and off-pump group. But radial artery showed more higher patency rate (98/110, 89%) in the severe stenotic lesion that preoperatively revealed more than 90% stenosis than in the lesser severe (<90%) stenotic lesion (60/76, 78%)(p < 0.005). Radial artery conduit represented the worst result when it was grafted in the right coronary system. But when it was positioned in the left heart especially diagonal or obtuse marginal area, patency was comparable with left internal thoracic artery. Conclusion: Radial artery graft showed good midterm patency when it was used in the severe stenotic lesion more than 90% and left coronary system. But great notice should be taken when it is grafted in the right coronary system or less severe stenotic lesion.

• Journal of Chest Surgery
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• v.46 no.4
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• pp.265-273
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• 2013

Background: The safety and efficacy of arterial composite grafts for total arterial revascularization have been demonstrated. The saphenous vein (SV) is a widely used graft because of its accessibility, sufficient length, and ease of manipulation. Our aim was to compare mid-term outcomes of saphenous vein Y-grafts with radial artery Y-grafts joined by anastomosis to the left internal thoracic artery. Materials and Methods: Records of off-pump coronary artery bypass grafting with composite Y-grafts based on the left internal thoracic artery technique in 552 patients were analyzed retrospectively. After propensity score matching, 79 radial arterial (RA) composite grafts (RA group) and 79 saphenous vein composite grafts (SV group) were compared. The duration of mean follow-up was $24.6{\pm}14.6$ months (range, 1 to 55 months). Results: There were no differences in surgical mortality, all-cause mortality, or morbidity among the groups. Rates of 4-year survival were 91.7% and 96.3% in the RA and SV groups, respectively (p=0.519). The coronary reintervention-free survival rate and freedom from major adverse cardiovascular or cerebrovascular events were similar in the two groups (p=0.685, p=0.564). Conclusion: Construction of composite Y-grafts using the radial artery or saphenous vein showed similar mid-term results. Long-term follow-up and randomized trials will be needed to confirm our present conclusions.

• Archives of Reconstructive Microsurgery
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• v.21 no.1
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• pp.21-26
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• 2012

The radial artery superficial palmar branch free flap is based on the perforators of the superficial palmar branch of the radial artery and its venae comitantes. This flap can be used as a sensible flap including palmar cutaneous branch of the median nerve. Forty radial artery superficial palmar branch free flaps were performed at Centum Institute during October 2010 to December 2011. There were 32 males and 8 females and their mean age were 48 years (range 30 to 66 years). The thumb injured in 13 patients, the index finger in 16 patients, the middle finger in 4 patients, the ring finger in 2 patients, and the little finger in 5 patients. The mean size of the flap was $2.5{\times}3.5$ cm(range $2{\times}2.5$ to $3{\times}7$ cm). The donor site was always closed primarily. The overall survival rate was 90.2 percent. The flaps showed well-padded tissue with glabrous skin. All patients have touch sensation and showed 12 mm two point discrimination in an average(range 8 to 15 mm). Donor site morbidity was conspicuous. One patient showed unsightly scar. Early postoperative range of motion of the affected thumb showed slightly limited radial and palmar abduction. But it improved after postoperative 2 months, and patients did not complaint limitation of motion. In conclusion, the radial artery superficial palmar branch free flap can be used as an option for soft tissue reconstruction of finger defects where local or island flaps are unsuitable.

• Journal of Physiology & Pathology in Korean Medicine
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• v.23 no.1
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• pp.186-191
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• 2009

In the study on the waveform analysis of radial artery pulse diagnosis, we need to establish fundaments of contemporary pulse diagnosis research. As we will to do experimental research on the difference of pulse waveform on the radial artery with applied variations of pressure(5 stage-pressure) and measuring position(CHON, KWAN, CHEOG). First of all, in this research, we did the experiment of the study on the waveform analysis of radial artery(left KWAN) pulse dignosis by using 3 dimension pulse meter and analyzer (3D MAC). As a result. we extracted the seven measurement fluents : energy(E), size of cycle(h1), size of reflection cycle(h2), time of reflection cycle(t2), time of contraction (t4), width of cycle(w), area of waveform(A) by the statistically reasonable differences. We expect that the seven measurement fluents contribute to divide the situation through the results of waveform analysis of radial artery.