MyMedR

Shear Wave Elastography: A Review on the Confounding Factors and Their Potential Mitigation in Detecting Chronic Kidney Disease

Lim WTH, Ooi EH, Foo JJ, Ng KH, Wong JHD, Leong SS

Ultrasound Med Biol, 2021 08;47(8):2033-2047.

PMID: 33958257 DOI: 10.1016/j.ultrasmedbio.2021.03.030

Early detection of chronic kidney disease is important to prevent progression of irreversible kidney damage, reducing the need for renal transplantation. Shear wave elastography is ideal as a quantitative imaging modality to detect chronic kidney disease because of its non-invasive nature, low cost and portability, making it highly accessible. However, the complexity of the kidney architecture and its tissue properties give rise to various confounding factors that affect the reliability of shear wave elastography in detecting chronic kidney disease, thus limiting its application to clinical trials. The objective of this review is to highlight the confounding factors presented by the complex properties of the kidney, in addition to outlining potential mitigation strategies, along with the prospect of increasing the versatility and reliability of shear wave elastography in detecting chronic kidney disease.

Matched MeSH terms: Kidney/blood supply

Some aspects of clinical interest in cerebral circulatory anatomy

Pallie W

Med J Malaya, 1966 Sep;21(1):70-8.

PMID: 4224882

Matched MeSH terms: Brain/blood supply*

Letter to the Editor: Cardiovascular risk prediction with cardio-ankle vascular index in the Malaysian cohort study

Sawlani A, Kumar J

Curr Probl Cardiol, 2024 Mar;49(3):102386.

PMID: 38184136 DOI: 10.1016/j.cpcardiol.2024.102386

Matched MeSH terms: Ankle/blood supply

Fulltext Finger vein recognition using local line binary pattern

Rosdi BA, Shing CW, Suandi SA

Sensors (Basel), 2011;11(12):11357-71.

PMID: 22247670 DOI: 10.3390/s111211357

In this paper, a personal verification method using finger vein is presented. Finger vein can be considered more secured compared to other hands based biometric traits such as fingerprint and palm print because the features are inside the human body. In the proposed method, a new texture descriptor called local line binary pattern (LLBP) is utilized as feature extraction technique. The neighbourhood shape in LLBP is a straight line, unlike in local binary pattern (LBP) which is a square shape. Experimental results show that the proposed method using LLBP has better performance than the previous methods using LBP and local derivative pattern (LDP).

Matched MeSH terms: Fingers/blood supply*

Systemic review of global case reports on ankle pseudo aneurysm: Analysis of epidemiology, clinical presentation, diagnosis and treatment

Aimanan K, Lim SY, Mohd Nor MR, Wahi AM, Chew LG

Med J Malaysia, 2020 01;75(1):88-93.

PMID: 32008030

INTRODUCTION: Pseudo aneurysm of the ankle is a rare presentation and the management is complex due to the complex anatomy. The aim of this review is to examine the epidemiology, etiology, diagnostic modalities used and management. This is the first systematic review of this topic in literature.

METHODS: We performed a systematic review in multiple databases (including PubMed, MEDLINE, EMBASE, and Scopus) from 1966 to May 18, 2019, to identify all case reports and case series describing patients with ankle pseudo aneurysm. This systematic review was performed in accordance with the Preferred Reporting Items for a Systematic Review and Meta-analysis (PRISMA). Our inclusion criteria included patients with ankle pseudo aneurysm of any age. We excluded reports in which the individual level data is not available. Patients demographic (gender, age), clinical characteristics (precipitating event, duration), diagnostic modality and treatment were recorded.

RESULT: There were in total 23 case reports identified on ankle pseudo aneurysm from 1966 until 2018. Among these twenty-three reports, 16 (70%) were male and seven (30%) patients were female. Age distribution showed higher number of reports among young adults, 15 patients (65%). Based on our systematic review trauma (48%), arthroscope (48%) and arthrodesis (4%) were the etiologies described in all these case reports. Ultrasound duplex and CT Angiogram has been used as a single modality in three reports each. In fifteen patients (65%) combination of imaging has been used for diagnosis. Anterior tibial artery is the most commonly injured vessel among the reported cases, comprised of 14 (61%) patients. Among these arthroscopes were the highest reported precipitating events, 9 (64%), followed by trauma in four patients (29%) and arthrodesis in one patient (7%). Treatment modalities described in all previous reports were excision and ligation, 10 (42%); excision of sac and primary repair, 4 (17%); excision of sac followed by reversed saphenous venous graft repair, 2 (8%); US guided compression, 2 (8%); US guided thrombin injection, 4 (17%); stenting, 1 (4%) and coiling, 1 (4%).

CONCLUSION: Ankle pseudoaneurysm is mostly preventable by detailed initial assessment following trauma or careful approach during arthroscope. Evolving diagnostic modality and treatment has shed some light into noninvasive management of pseudo aneurysm of ankle.

Matched MeSH terms: Ankle/blood supply*

A comparative study of radiation doses between phantom and patients via CT angiography of the intra-/extra-cranial, pulmonary, and abdominal/pelvic arteries

Karim MKA, Sabarudin A, Muhammad NA, Ng KH

Radiol Phys Technol, 2019 Dec;12(4):374-381.

PMID: 31468370 DOI: 10.1007/s12194-019-00532-8

This study aimed to evaluate effective dose and size-specific dose estimate (SSDE) of computed tomography angiography (CTA) examination using an anthropomorphic phantom. We included three CTA examination protocols to evaluate the intra- and extra-cranial arteries, pulmonary artery (CTPA), and abdominal vessels. Patient SSDEs were measured retrospectively to estimate patient dose, relative to the bodyweight of the patient and volume CT dose index (CTDIvol). Our findings revealed that the highest dose was absorbed by the left lobe of the thyroid gland during intra-/extra-cranial CTA and CTPA, that is, 14.11 ± 0.24 mGy and 16.20 ± 3.95 mGy, respectively. However, the highest absorbed dose in abdominal/pelvic CTA was the gonads (8.98 ± 0.30 mGy), while other radiosensitive organs in intra- and extra-cranial CTA, CTPA, and abdominal/pelvic CTA did not demonstrate significant differences between organs/structures with p value 0.88, 0.11, and 0.54, respectively. The estimated effective dose in intra-/extra-cranial CTA was lower in patients (0.80 ± 0.60 mSv) than in the phantom (0.83 mSv), but it was the opposite for CTPA, with the effective dose being higher in patients (7.54 ± 3.09 mSv) than in the phantom (6.68 mSv). Similar to the effective dose, only CTPA SSDEs were significantly higher in men than in women (19.74 ± 4.79 mGy versus 7.9 mGy). Effective dose and SSDE are clinically relevant parameters that can help estimate a more accurate patient dose based on a patient's size.

Matched MeSH terms: Abdomen/blood supply; Lung/blood supply; Pelvis/blood supply; Skull/blood supply

Patterns of the superficial veins of the cubital fossa: A meta-analysis

Yammine K, Erić M

Phlebology, 2017 Jul;32(6):403-414.

PMID: 27343223 DOI: 10.1177/0268355516655670

Background The aim of this systematic review is to quantitatively synthesize evidence on the prevalence of superficial vein patterns in the cubital region. Method A systematic literature search was conducted through a number of electronic databases. We identified 27 studies, including 9924 arms, which met the inclusion criteria. Results Meta-analysis showed that "N" shaped arrangement type was the commonest pattern (≈44-60%) followed by "M" shaped arrangement (≈20-25%). The prevalence of "M" type and "M"-like type was significantly higher in males, whereas females showed a significant predominance of "I" or "O" type. No significant differences in various pattern types were found for laterality. The frequency of "M" type is significantly lesser in Indian and Japanese populations, but they have significantly higher frequency of "N" type. In Malay population, "I" or "O" type was significantly higher, while the brachial CV was poorly developed or missing significantly in Indian population. Conclusion This evidence-based clinical anatomy review contributes to our anatomical knowledge regarding the true prevalence of pattern types of the superficial veins in cubital region in humans and, subsequently, might help in performing safer venous access and more direct approaches to these veins, especially under emergency conditions.

Matched MeSH terms: Arm/blood supply*; Forearm/blood supply*

Oblique Retro-Aortic Left Renal Vein and its Clinical Importance

Bhagavath P, Nayak BS, Monteiro NP, Kumar GP

Kathmandu Univ Med J (KUMJ), 2016 7 18;13(52):369-71.

PMID: 27423291

Kidneys are the organs that remove the waste products of the metabolic activities. A smooth blood flow to the kidneys is essential to maintain their function. Abnormalities of the renal vasculature may result not only in impairing the renal function but can lead to conditions like varicocele. During an autopsy of an adult male, we observed renal vascular variations. The left renal vein had a retro-aortic course before its termination into the inferior vena cava. It was joined with the inferior vena cava at the level of inferior mesenteric artery with an acute angle. The left testicular vein joined the left renal vein with an acute angle. The right kidney was supplied by two renal arteries. The knowledge about retro-aortic course of the left renal vein may be important during renal transplantation. The oblique course of left renal vein and the termination of left testicular vein into it with an acute angle may increase the chances of left sided varicocele.

Matched MeSH terms: Kidney/blood supply; Testis/blood supply

Fulltext Endoscopic coagulation of sphenopalatine artery for posterior epistaxis

Prepageran N, Krishnan G

Singapore Med J, 2003 Mar;44(3):123-5.

PMID: 12953724

To present our experience of endoscopic electrocoagulation of sphenopalatine artery for persistent posterior epistaxis despite conservative measures.

Matched MeSH terms: Nasal Cavity/blood supply*; Nasopharynx/blood supply*

Variant course of posterior circumflex humeral artery associated with the abnormal origin of radial collateral artery: could it mimic the quadrangular space syndrome?

Mohandas Rao KG, Somayaji SN, Ashwini LS, Ravindra S, Abhinitha P, Rao A, et al.

Acta Med Iran, 2012;50(8):572-6.

PMID: 23109033

Variations in the origin of axillary artery branches are common. But, distinctly abnormal course of its posterior circumflex humeral branch is rare. We are reporting a case of posterior circumflex humeral artery (PCHA) originating from the axillary artery, passing through lower triangular space to reach the scapular region where it accompanied the axillary nerve and posterior circumflex humeral vein to pass around surgical neck of humerus, deep to the fibers of deltoid. Other variations observed in this specimen were the radial collateral artery arising from the PCHA, middle collateral artery arising directly from the brachial artery and absence of profunda brachii artery. PCHA forming a hair pin loop, traversing through lower triangular space instead of quadrangular space taking a long course is being reported for the first time. Further, the clinical and surgical importance of this case especially in relation with quadrangular space syndrome and relevant literature is discussed.

Matched MeSH terms: Humerus/blood supply*

Abnormal course of left testicular artery in relation to an abnormal left renal vein: a case report

Satheesha NB

Kathmandu Univ Med J (KUMJ), 2007 Jan-Mar;5(1):108-9.

PMID: 18603997

The testis is an important organ upon which the survival of the human species depends. Any compression of testicular artery may lead to loss of gametogenesis and hormone production. We found a left testicular artery entrapped between two divisions of a left renal vein in an approximately 50 year old cadaver. The left renal vein was formed by union of two veins coming from the kidney, left suprarenal vein, left testicular vein and an abnormally enlarged lumbar vein. This case may be of particular importance to surgeons who transplant kidneys, radiologists and orthopaedic surgeons dealing with the spine repairs.

Matched MeSH terms: Testis/blood supply*

Unusual branching pattern of brachial artery - Embryological basis and clinicoanatomical insight

Hansdak R, Arora J, Sharma M, Mehta V, Suri RK, Das S

Clin Ter, 2015;166(2):65-7.

PMID: 25945432 DOI: 10.7417/CT.2015.1817

Variations in the arterial pattern of upper limb are of colossal importance to the surgeons as they are liable to iatrogenic injuries. During routine dissection for undergraduate medical students, an anomaly of brachial artery was discovered. The brachial artery terminated at higher level into ulnar and radial artery. The common interosseus artery took origin arising from radial artery. The ulnar artery did not give any branches in the forearm. Both radial and ulnar artery displayed a superficial course in the forearm. The anatomical knowledge of these variations may be of great help for the clinicians in planning and conducting flap harvesting during reconstructive surgeries and in arteriography.

Matched MeSH terms: Upper Extremity/blood supply

Fulltext Patterns of superficial veins of the cubital fossa in Malays

Dharap AS, Shaharuddin MY

Med J Malaysia, 1994 Sep;49(3):239-41.

PMID: 7845272

Patterns of superficial veins of the cubital fossa were studied in 170 male and 96 female Malays. Six venous patterns were observed. The less commonly known but clinically important patterns observed included absence of communication between basilic and cephalic veins (in 7.3% females and 8.8% males); an arched median cubital vein (in 2.0% females and 6.5% males); absence of the cephalic vein (in 1.0% females and 2.9% males) and two median cubital veins (in 1 male only). Awareness of these uncommon cubital venous patterns and their approximate incidence would be very useful for those performing venepuncture or venesection in Malays, especially under emergency conditions.

Matched MeSH terms: Forearm/blood supply*

Thrombosis of the renal veins

MUIR CS

Med J Malaya, 1957 Mar;11(3):242-6.

PMID: 13477002

Matched MeSH terms: Kidney/blood supply*

Cardiovascular risk prediction with cardio-ankle vascular index in the malaysian cohort study

Abdullah N, Blin JA, Kamalul Arifin AS, Abd Jalal N, Ismail N, Mohd Yusof NA, et al.

Curr Probl Cardiol, 2024 Mar;49(3):102192.

PMID: 37952789 DOI: 10.1016/j.cpcardiol.2023.102192

The cardio-ankle vascular index (CAVI) is an important parameter assessing arterial function. It reflects arterial stiffness from the origin of the aorta to the ankle, and the algorithm is blood pressure independent. Recent data have suggested that a high CAVI score can predict future cardiovascular disease (CVD) events; however, to date, no study has been done in Malaysia. We conducted a prospective study on 2,168 The Malaysian Cohort (TMC) CVD-free participants (971 men and 1,197 women; mean age 51.64 ± 8.38 years old) recruited from November 2011 to March 2012. This participants were followed-up until the emergence of CVD incidence and mortality (endpoint between May to September 2019; duration of 7.5 years). Eligible participants were assessed based on CAVI baseline measurement which categorised them into low (CAVI <9.0) and high (CAVI ≥ 9.0) scores. The CVD events in the group with high CAVI (6.5 %) were significantly higher than in the low CAVI (2.6 %) group (p

Matched MeSH terms: Ankle/blood supply

Anomalous Course of Facial Artery Through the Submandibular Gland and its Redundant Loop at the Base of Mandible

Nayak SB, Vasudeva SK, Pamidi N, Sirasanagandla SR

J Craniofac Surg, 2020 Oct;31(7):2015-2016.

PMID: 32472879 DOI: 10.1097/SCS.0000000000006539

Knowledge of variant course and branching pattern of the facial artery gains importance in the surgeries of upper neck and face. The authors report a unilateral anomalous course and a redundant loop of right facial artery as seen in an adult male cadaver. The right facial artery had its origin from the external carotid artery. It pierced through the submandibular salivary gland and formed a redundant loop at the base of the mandible. Its further course and branching pattern was normal. This case could be important for radiologists, plastic surgeons and craniofacial surgeons.

Matched MeSH terms: Face/blood supply*; Mandible/blood supply*; Submandibular Gland/blood supply*

Fulltext Hyperspectral venous image quality assessment for optimum illumination range selection based on skin tone characteristics

Shahzad A, Saad MN, Walter N, Malik AS, Meriaudeau F

Biomed Eng Online, 2014;13:109.

PMID: 25087016 DOI: 10.1186/1475-925X-13-109

Subcutaneous veins localization is usually performed manually by medical staff to find suitable vein to insert catheter for medication delivery or blood sample function. The rule of thumb is to find large and straight enough vein for the medication to flow inside of the selected blood vessel without any obstruction. The problem of peripheral difficult venous access arises when patient's veins are not visible due to any reason like dark skin tone, presence of hair, high body fat or dehydrated condition, etc.

Matched MeSH terms: Skin/blood supply*

Fulltext Arteriovenous malformation of the pregnant uterus

Kathiravan C, Emilia SH, Mutum SS

Med J Malaysia, 2007 Jun;62(2):179-80.

PMID: 18705462

Arteriovenous malformation of the pregnant uterus is very rare, and may present with unexplained torrential bleeding. We report a patient with absence of the conventional risk factors, and was saved by quick recourse to hysterectomy to control the bleeding.

Matched MeSH terms: Uterus/blood supply*

Fulltext Solitary vascular malformation of the clitoris

Haritharan T, Islah M, Zulfiqar A, Thambi Dorai CR

Med J Malaysia, 2006 Jun;61(2):258-9.

PMID: 16898327 MyJurnal

Isolated involvement of the clitoris by vascular malformation (VM) is very rare. Clinically, the lesion simulates female pseudohermaphroditism. A five-year-old girl presented with clitoromegaly and a clinical diagnosis of solitary VM of the clitoris was made. Magnetic resonance imaging showed characteristic features and confirmed the diagnosis and the extent of the VM. This is the first reported case of isolated involvement of the clitoris by VM to be diagnosed preoperatively.

Matched MeSH terms: Clitoris/blood supply*

Fulltext A strange case of double annular pancreas

Nayak S, Pamidi N, George BM, Guru A

JOP, 2013 Jan;14(1):96-8.

PMID: 23306345 DOI: 10.6092/1590-8577/1281

The pancreas is a soft lobulated gland situated transversely across the upper part of the posterior abdominal wall. Its parts include the head, neck, body and tail. Annular pancreas is a rare condition where the head of the pancreas surrounds the second part of the duodenum like a ring.

Matched MeSH terms: Pancreas/blood supply

Displaying publications 1 - 20 of 248 in total