Sustiva

2019, Schiller International University, Murat's review: "Purchase online Sustiva cheap - Effective Sustiva online".

Palmar Tendon Compartments First Palmar Tendon Compartment The palmar flexor retinaculum arises proximal to the carpal region with the palmar carpal ligament located on This tendon compartment serves to guide the tendon the surface from the antebrachial fascia 600mg sustiva mastercard,229 coinciding sheath and the round tendon of the flexor carpi radialis with the carpal tunnel in its extension safe 200mg sustiva. It is approximately muscle cheap sustiva 600 mg with amex, which is approximately 12 to 14cm long cheap 600 mg sustiva fast delivery, in the 26mm wide, around 22mm long, and is 1. This means that chronic fibrosis of the third palmar tendon compartment only two tendon compartments traverse the carpal due to repetitive strain. Practical Tip Carpal Tunnel, Ulnar Tunnel, and As a result of trauma or osteoarthritis of the wrist, the Innervation of the Hand tendon compartment can lose its capacity to guide the The median nerve is most frequently exposed to com- tendon, which can lead to irritation and even rupture of pression-related damage in the area of the carpal tun- the tendon. Local tenderness is generally commonly affected by sulcus-ulnaris syndrome; the sec- present next to the scaphoid tubercle. The tendon sheath of the flexor pollicis longus muscle, which is around 12 to 14cm long, originates at the level Carpal Tunnel of the radial styloid process. The medial nerve is fused with this ten- a dynamic arrangement of carpal bones and ligaments don sheath by means of a mesotendon. The entrance opening narrows during flexion as a result Third Palmar Tendon Compartment of the flexor retinaculum moving closer to the radius and The third palmar tendon compartment originates around the capitate shifting toward distal and palmar. During ex- 5 to 7 cm from the proximal palmar wrist joint line and tension, the carpal tunnel is constricted due to the lunate, which is pressed toward the interior of the tunnel. While the pressure in the neutral position is palmar tendon compartment serves to guide eight ten- approximately 2mm Hg, the pressure in extension dons, namely four tendons each of the flexor digitorum increases to around 33 mm Hg and during flexion to approximately 42mm Hg. The tendons of the flexor digitorum profundus muscle are ment values obtained in the two examinations, there is a connected to each other in the carpal tunnel by several significant difference in the pressure at rest and the intertendinous fibers. Any constrictions in sion, the other fingers can no longer be actively flexed the carpal tunnel essentially compromise the conductiv- completely in the distal joint. This is due not only to mechani- muscle belly and its short fiber length of 8cm, it is not cal pressure but also to the interruption of the blood supply within the nerve sheath. In 50% of the population, this tendon sheath communicates with the tendon sheath of the and the fingers are extended in the proximal joints and flexor pollicis longus muscle. The floor of the ulnar result, the abductor pollicis brevis muscle supplied by tunnel is formed by the flexor retinaculum and the piso- the median nerve immobilizes the thumb, and the exten- hamate ligament, while the roof is formed by the palmar sors supplied by the radial nerve immobilize the fingers carpal ligament and, in some cases, by fibers of the pal- in this position. Immediately in front of or in the proximal sec- ▶ Anatomical structure of the carpal tunnel. The carpal tion of the canal, the palmar branch of the ulnar nerve tunnel is an osteofibrous canal, approximately 2. In the level of the canal exit, the deep nerve branch passes proximal section, the floor is formed by the capitate, through a narrow area between the hook of the hamate hamate, and triquetrum and in the distal section by the and a fibrous tendinous arch, which serves as the origin capitate and trapezoid. The ulnar nerve and naculum, which inserts onto the radial aspect at the sca- its further branches run ulnarward to the ulnar artery. The Note flexor retinaculum is thicker in the distal portion and the carpal space narrows in this less superficial location. There, it is located behind the biceps aponeurosis and the The brachial plexus is part of the peripheral nervous sys- median cubital vein and in front of the insertion of the tem and is formed by the C5 to T1 spinal nerves. In this area, the peripheral nerve is also referred to as a mixed nerve, muscular rami branch off and innervate the pronator since it contains both afferent and efferent somatic and teres, flexor carpi radialis, palmaris longus, and flexor autonomic nerve fibers. The of the spinal cord to the skeletal muscles (somatic effer- median nerve enters the forearm by traversing the hum- ent). It proceeds further on the shoulder girdle muscles and for the upper extremity, the interosseous membrane of the forearm to the prona- as well as sensory branches for the skin of the shoulder tor quadratus muscle and gives off further branches to and the upper extremity. Between the flexor digitorum superficialis and flexor digitorum pro- Median Nerve fundus muscles, its further course culminates in the wrist The median nerve (C6–T1) arises from the brachial plexus joint. Before it enters the carpal tunnel, it lies superficially in the area of the axillary artery by union of the median between the tendons of the flexor carpi radialis and pal- and lateral fascicles (“median sling”). The nerve runs in maris longus muscles and gives off the sensory palmar the bicipital medial sulcus superficial to the brachial branch of the thenar. Between direction on the flexor side of the forearm below the 60° extension and 65° flexion in the wrist, the nerve muscle belly of the flexor carpi ulnaris muscle. It gives off branches for all muscles of the hypothe- Note nar, namely the abductor digiti minimi, flexor digiti minimi, and opponens digiti minimi. It also innervates all Damage to the median nerve at the level of the forearm dorsal and palmar interossei, the fourth and fifth lumbri- results in the clinical picture of ape-hand deformity, cals, as well as individual muscles of the thenar, that is, which is due to damage of the motor branches to the the adductor pollicis and the deep head of the flexor pol- forearm flexors. The sen- sory palmar branch, given off somewhat lower, inner- vates the ulnar section of the wrist flexor side and the proximal hypothenar. The superficial branch arising in Ulnar Nerve 232 the ulnar tunnel innervates the palmaris brevis The ulnar nerve (C8–T1) is a major nerve originating muscle and provides sensory innervation for the skin from the medial fascicle of the brachial plexus. It of the ulnar palm, with its two digital palmar nerves courses across the axillary artery and vein to the medial giving rise to the proper palmar digital nerves, which side of the brachial artery in the upper arm and continues innervate the lateral and palmar surface of the small its course there at the ulnar side in a distal direction and ring fingers and the dorsal surface of their distal (▶Fig. In the distal third of the upper ○ Extensor pollicis longus muscle arm, it reaches the brachial and brachioradialis muscles ○ Proper extensor indicis muscle on the flexor side. At this level, it crosses the elbow joint and at the head of the radius divides into its two terminal ▶Table 1. In the axilla the inferior lateral cutaneous nerve of the arm branches off and innervates the skin of the lateral Note side of the upper arm. Extension is not possible in either the wrist or fin- enters the sulcus nervi radialis, the motor muscular 102 200 ger joints and the hand therefore hangs down limply. In the sulcus nervi radialis, the poste- rior cutaneous nerve of the forearm follows, innervating the skin of the forearm extensor side up to the carpus. Exteroceptive Sensation and Proprioception The superficial branch continues at the forearm to the Sensation comprises the capacity to perceive various medial surface of the brachioradialis muscle, and then stimuli by means of sensors, via afferent, peripheral, and extends in the lower third between this muscle and the central nervous pathways to the central nervous sys- radius on the dorsal side up to the dorsum of the hand. They are div- of Frohse175) and in this muscle winds around the radius ided into intensity, velocity, and acceleration detec- to the extensor side, where it innervates the entire dorsal tors. They comprise the these spatial receptors is very precise, with differences Merkel cells located in the epidermis and the Ruffini of 0. Depending on location, Meißner’s cor- into the radial and ulnar arteries, which extend from puscles located in the dermis assume this responsibil- there toward the wrist joint in a distal direction ity in hairless regions and in hairy regions, (▶ Fig. In the lower third of the forearm, only unnamed vessel branches divide up for their supply. They become the brachial artery in the elbow, and in the remaining 15 active only if there are stronger stimuli, such as tactile 69 to 20% of the cases it branches off from the brachial artery and vibration sensations. In the periphery, ● Protopathic sensation: Protopathic sensation is under- the radial artery extends in a directly lateral direction next stood to be the emotionally colored sensation of pain, to the tendon of the flexor carpi radialis muscle and ends temperature, and overall perception of pressure that 14 at the level of the wrist, where the pulse can be easily pal- can be less precisely located. Behind the trapezium and the base of the first cold and heat receptors, as well as different myelinated metacarpal, it merges into the superficial and deep palmar and unmyelinated nociceptors are activated and fre- 85 69 arches, through which it unites with the ulnar artery. The myelinated However, before reaching the deep palmar arch, the radial A-fiber mechanonociceptors react to pricking stimuli artery takes a dorsal course by leaving the flexor side of and in addition the A-polymodal nociceptors react to 69 the forearm at the level of the anatomic snuffbox and after heat and chemical stimuli. The unmyelinated C-poly- passing a short distance through the space between the modal nociceptors (“C-fibers”) respond equally to first and second metacarpals, it returns to the palmar side mechanical, pricking stimuli, as well as stimuli for 85 and ultimately ends in the deep palmar arch. Depending on the intensity of the stimu- lus, this coupling can allow heat to be perceived as “pain,” for example, as a protective response. The myeli- Ulnar Artery nated nociceptors make up over 10% of all human cuta- The ulnar artery also originates from the brachial artery neous nerves and the unmyelinated nociceptors make at the level of the elbow. Next to the tendinous part of this and become active spontaneously (“sensitization”). In the ● Proprioceptive sensation: Proprioceptive sensation area of the wrist joint, it can be easily palpated in front of provides information about the movement and location the pisiform. These two arches join with the about the static position and the speed and direction of superficial and deep palmar arches of the radial artery in this movement. After passing through the ulnar tunnel, the ulnar sented by the muscle spindle receptors, and in the joint artery joins the superficial palmar arch, which ends capsule they may be represented by the Pacini cor- superficially in relation to the flexor tendons of the fin- puscles. It may be assumed that the Ruffini corpuscles gers and the branches of the median nerve in the middle 46 1. In 95% of cases, it is closed by an anas- from the central region of the hand remain on the palmar tomosis with the ulnar artery. They join the medial vascular bundle in the fore- radial indicis arteries and the palmar metacarpal arteries arm. Median nerve Ulnar artery Radial artery 47 1 Anatomy and Functional Anatomy of the Hand Lymph vessels ascending from Fig.

Growth Spurts Tere is the clinical signifcance of this pattern of lym- Acceleration of growth is a characteristic of three periods phoid growth buy 600mg sustiva visa. In mid-childhood purchase sustiva 200 mg, it is usual to fnd pal- (the so-called growth spurts): pable lymph nodes in normal children sustiva 600 mg without a prescription. Six to eight years (mid-childhood growth spurt) size four important facts about postnatal growth curves 3 600 mg sustiva free shipping. As for instance, during infancy, head is much larger in relation to Growth, a remarkable feature of childhood is a continuous the size of the rest of the body. It begins at conception and continues changes to assume the adult ratio in the subsequent years through infancy, childhood and adolescence until the child of childhood and adolescence. Its assessment and monitoring are In younger children, the limbs are relatively short. Te mandatory to detect any faltering and then take remedial relationship of sitting height (trunk and head) with total measures. In a child with hypopituitary dwarfsm, the Weight body proportions correspond to chronological age. Te proportions in a child with hypothyroidism, on the other newborn loses upto 10% of his weight during the frst week. After this, Types of Body Build (Somatotypes) weight gain occurs at a rate of 25–30 g a day for the frst three According to Sheldon somatotype classifcation of human months and 400 g a month during the rest of the frst year of physique, the individuals can be categorized as ecto- life. Tereafter, gain is two kg/year till the age of seven years morphic, endomorphic or mesomorphic (Box 3. Te infant doubles his birth weight by the age of 4–6 Somatic Growth months and trebles it by one year. He increases it four times It has two components—(1) skeletal maturity and (2) erup- by two years, fve times by three years, six times by fve years tion of teeth. It rises to 60 cm at three months, 70 cm at nine Weight (kg) at 7–12 years = 2 months, 75 cm at one year, 90 cm at two years, 95 cm at three years and 100 cm at four years. For feld, an Indian modifcation of the famous English For convenience, you may remember: Length (cm) at birth = 50 Salter spring machine (Fig. It is a portable Height (cm) at 2–12 years = age (years) × 6 + 77 gadget, weighing only two kg, and is accurate upto 100 g. A Half of the adult height is attained by two years in girls and 2½ years scale that can record upto 20 kg is available. Toddlers and older children and adoles- better option for weighing toddlers, older children and adolescents. In case this kind of an infantometer is not readily available, the purpose is served with a fabricated infantometer employing a book at the head-end and another at the foot-end of the infant (in lying down posture). Proper alignment of head and feet and straightening of legs is important for accuracy. For children under two years, it is advisable to measure the recumbent length, while the child lies supine, (with legs fully extended at hips and knees and feet at right angles to legs) in the so-called infantometer (Fig. Such an infantometer may be fabricated by placing a book vertically at the head-end and another at the foot-end. Arms should hang naturally by period, rather than weight, it is the height that is more the sides. Te line joining the upper margin of the external useful as an indicator of growth, especially when two auditory meatus and lower margin of the orbits (Frankfort measurements are recorded at an interval of about six horizontal plane) should be in the plane parallel to the months. Te height should be recorded height needs to be measured on more than one occasion to the nearest 0. Now, digital ultrasonic over a period of time and the increment in height divided height measuring system too has become available. With the greater Birth 35 increase in the length of the legs compared to the 3 months 41 trunk, the ratio is 1. Tereafter, lower segment tends to 3 years 50 show a slight edge over the upper segment, the ratio being 0. Span is the distance between tips of middle fngers when the arms are outstretched. Te tape (non-stretchable) is placed over the occiput at the back and just above the supraorbital ridges in front (mid forehead). Measurement of chest circumference 41 cm (against a normal of 47 cm), global developmental delay and at the level of the nipples. Head/Chest Circumference Ratio At birth, head circumference is larger than chest circumfer- ence by about 2. By the age of fve years, it is more or less 5 cm greater in size than the head circumference. Ten place the tape frmly, but without compressing the tissues around the upper arm at a point midway between tip of Fig. Skin-fold Thickness z Late closure should arouse suspicion of rickets, congenital hypothyroidism, hydrocephalus, syphi- Of the various skin-folds (subscapular, biceps and triceps), lis, protein-energy malnutrition, etc. A fold of skin is held between the thumb and , ^d /Z hD& Z E index fnger and measured. For measuring chest circumference place the tape at the Ratio of total body water and body weight is a more level of the nipples (or xiphisternum) in a plane at right accurate index of body fat, correlating at about 0. An average full-term newborn has fve radiologically demonstrable ossifcation centers (Box 3. Ossifcation of the carpal bones occurs in a predictable sequence, starting with the capitate and ending with the pisiform (Figs 3. It is a useful guide to remember that number of centers at wrist is equal to age in years plus one. Tus, a child of two years should Body Mass Index have three centers in an X-ray of wrist. If possible the child should stand erect and sideways to the Generally, the lower central and lateral incisors erupt measurer. Delayed eruption of frst tooth (upto as late as 15 months) z When the tape is in the correct position and correct tension on the in a normal child is also seen. Likewise, late appearance of arm, read and call out the measurement to the nearest 0. Among the possible factors responsible for delayed dentition include: Familial and/or racial tendency, Dentition Poor nutritional status, It is not a dependable parameter for assessment of growth Rickets, since there is a wide variation in the eruption of teeth and Osteogenesis imperfecta. Very infrequently, a child may have an absolute non- Te average age at which frst tooth erupts is eruption of teeth (anodontid) which is a classical feature 6–7 months. This is the most dependable and accurate caliper for measuring skin-fold thickness. Each division on the be responsible for excessive salivation and drooling, irrita- scale is 0. Local application of choline salicylate and an oral analgesic or a mild seda- Discoloration of temporary teeth right from the start tive should sufce. Between 1 and 12 years of age, z Pseudohypoparathyroidism radiograph of hand and wrist is most often employed for determination z Acrodysotosis of bone age. Lymphoid tissue shows enormous growth, going much beyond the adult size during early adolescence. David Morley, growth chart is def- should also be taken into consideration For instance: ned as a visible display of child’s growth and development. Birth Nil 6–7 months Central incisors Applications (Uses) By 10 months Laterals incisors Te chart is meant: 1–1½ years First molars To make growth a tangible visible attribute. It should, therefore, be sufciently attractive and designed to facilitate accurate recording in a simple Table 3. A fat curve indicates a slowed or arrested growth which must Features alert the attending doctor to take action, both diagnostic as to its cause and corrective so as to lead to normal growth Te strategy recognizes growth to be the result of once again. Growth monitoring is best initiated from birth rather Government of India growth chart, as modifed in than when the child is already 2–3 years old. Perhaps, the defciency lies in chart has over and above the standard, 3 reference modus operandi in execution rather than an inherent lines. Nevertheless, Specifc components catch-up growth is likely to be signifcantly less in case Age group of monitoring Schedule of recurrent episodes of growth inhibitory factors. Obviously, the hormonal factors (especially the Monitoring linear catch-up growth is of great clinical somatotrophic axis) and the epiphyseal growth plate are importance because of its value in measuring the efcacy of paramount importance in catch-up growth. Te three available hypotheses are given It is defned as height velocity above statistical limits of in Box 3. It is intended to revert the child to his pre-retardation Te question whether the developing countries should growth curve.

A further study of 220 women with a mean follow-up of 18 months again gives similar results: 18 (8 discount sustiva 600 mg mastercard. From these studies order 600 mg sustiva otc, it is clear that the incidence of urogenital prolapse generic sustiva 600mg visa, and in particular posterior compartment defects generic sustiva 200mg without prescription, increases following colposuspension. In view of these findings, it is important to counsel women regarding outcome not only in terms of cure but also in respect to the need for further pelvic floor surgery. Sexual Dysfunction By elevating the bladder neck and anterior vaginal wall, a colposuspension may lead to the posterior vaginal being pulled forward and upward leading to a change in the vaginal angle causing dyspareunia [108]. Postoperative sexual dysfunction has been described in 2%–8% of women following continence surgery although there were no significant differences between procedures [43]. Healthcare resource use over the first 6-month follow-up period translated into costs of £1805 for the laparoscopic group versus £1433 for the open group. The description of Burch colposuspension in 1961 revolutionized the surgical approach to stress incontinence and rapidly replaced the Marshall–Marchetti–Krantz procedure. Almost 50 years later, the available evidence demonstrates that open retropubic suspension is an effective treatment for the treatment of stress incontinence in both long- and short-term trials. Comparative studies have demonstrated that colposuspension is superior to anterior colporrhaphy and needle suspension procedures and is comparable to traditional sling procedures and laparoscopic colposuspension. A recent long-term study has reported outcome in 155 458 women over 10 years following surgery for stress urinary incontinence. Consequently, colposuspension still has a role in women having concomitant surgery such as abdominal hysterectomy, oophorectomy, and open abdominal sacrocolpopexy. In addition, colposuspension may offer an alternative to a mid-urethral tape procedure following urethral diverticulectomy or repair of a urethra–vaginal fistula, where it may be preferable to avoid the interposition of a synthetic mesh. Report from the standardisation committee of the International Continence Society. Structural support of the urethra as it relates to stress incontinence: The hammock hypothesis. Urethral pressure measurement by microtransducer: The results in symptom free women and in those with genuine stress incontinence. Dynamic urethral pressure Profilometry pressure transmission ratio determinations after continence surgery: Understanding the mechanism of success, failure and complications. The role of pudendal nerve damage in the aetiology of genuine stress incontinence in women. Correlating structure and function; three-dimensional ultrasound of the urethral sphincter. Location of maximal intraurethral pressure related to urogenital diaphragm in the female subject as studied by simultaneous urethra-cystometry and voiding urethrocystography. Urethrovaginal fixation to Cooper’s ligament for correction of stress incontinence, cystocele and prolapse. Genuine stress incontinence, the retropubic procedure: A physiologic approach to repair. Prospective comparison of laparoscopic and traditional colposuspension in the treatment of genuine stress incontinence. An ambulatory surgical procedure under local anaesthesia for treatment of female urinary incontinence. Transobturator urethral suspension: Mini-invasive procedure in the treatment of stress urinary incontinence in women. Burch colposuspension versus modified Marshall–Marchetti– Krantz Urethropexy for primary genuine stress urinary incontinence: A prospective randomised trial. Genuine stress incontinence: Prospective randomised comparison of two operative methods. A randomised prospective study of three operative methods for genuine stress incontinence. Marshall–Marchetti–Krantz Urethropexy and Burch colposuspension for stress urinary incontinence in women with low pressure and hypermobility of the urethra: Early results of a prospective randomised clinical trial. Outcomes of Urethropexy added to paravaginal defect repair: A randomised trial of Burch versus Marshall–Marchetti–Krantz. Surgical therapies of female stress urinary incontinence: Experience in 228 cases. Comparison of the anterior colporrhaphy procedure and the Marshall–Marchetti–Krantz operation in the treatment of stress urinary incontinence among women. Ten year results of Marshall–Marchetti–Krantz and anterior colporrhaphy procedures. Female Stress Urinary Incontinence Clinical Guidelines Panel summary report on surgical management of female stress urinary incontinence. Marshall–Marchetti–Krantz procedure and Burch colposuspension in the surgical treatment of female urinary incontinence. Surgical results and urodynamic studies 10 years after retropubic colpourethrocystopexy. Longterm (10–15 years) follow up after Burch colposuspension for urinary stress incontinence. A comparison of vaginal and suprapubic surgery in the correction of incontinence due to urethral sphincter incompetence. Colposuspension after previous failed continence surgery: A prospective 1125 observational study. The Burch colposuspension for recurrent urinary stress incontinence following retropubic continence surgery. A comparison of the objective and subjective outcomes of colposuspension for stress incontinence in women. Secondary colposuspension: Results of a prospective study from a tertiary referral centre. Comparison of three different surgical procedures for genuine stress incontinence; prospective randomised study. Primary stress urinary incontinence and pelvic relaxation: Prospective randomised comparison of three different operations. Three surgical procedures for genuine stress incontinence: Five year follow up of a prospective randomised study. The effectiveness of surgery for stress incontinence in women: A systematic review. A randomised trial of Burch retropubic Urethropexy and anterior colporrhaphy for stress urinary incontinence. Randomised comparison of Burch colposuspension versus anterior colporrhaphy in women with stress urinary incontinence and anterior vaginal wall prolapse. A randomised comparison of Burch Colposuspension and abdominal paravaginal defect repair for female stress urinary incontinence. A trial comparing the Stamey bladder neck suspension procedure with colposuspension for the treatment of stress incontinence. A prospective randomised trial comparing a modified needle suspension procedure with the vaginal/obturator shelf procedure for genuine stress incontinence. Burch colposuspension versus Stamey endoscopic bladder neck suspension: A urodynamic appraisal. Comparative analysis of bladder neck suspension using Raz, Burch and transvaginal Burch procedures. Comparison of Burch and lyodura sling procedures for repair of unsuccessful incontinence surgery. A prospective randomised study comparing modified Burch retropubic Urethropexy and suburethral sling for treatment of genuine stress incontinence with low pressure urethra. A randomised controlled trial comparing a modified Burch procedure and a suburethral sling: Long term follow up. Comparison of the efficacy of Burch colposuspension, pubovaginal sling and tension free vaginal tape for stress urinary incontinence. Prospective multicentre randomised trial of tension free vaginal tape and colposuspension as a primary treatment for stress incontinence. A prospective multicentre randomised trial of tension free vaginal tape and colposuspension for primary urodynamic stress incontinence: Two year follow up. Tension free vaginal tape versus colposuspension for primary urodynamic stress incontinence: 5 year follow up. Burch colposuspension and tension free vaginal tape in the management of stress urinary incontinence in women. Comparison of tension free vaginal taping versus modified Burch colposuspension on urethral obstruction: A randomised controlled trial.

This type of injury is consistent with an impact and fracture of tempered glass sustiva 200 mg sale, which is present in many side windows sustiva 600 mg low cost. Rarely the presence of shoe sole patterns may be observed on the accelerator or brake pedals generic sustiva 200 mg online, indicating what the driver was doing at the time of the impact discount sustiva 600mg on line. Note the fragment of scalp with scalp hair imbedded in the top part of the windshield and adjacent car roof. Due to her dark skin, the contusions are not obvious from external examination alone. Incision of the posterior aspects of her leg reveals hemor- rhage due to the bumper impact. It is good practice to photograph these impact sites with a ruler to demonstrate the dis- tance from the decedent’s heels. This can be matched to a particular car and to whether the driver applied brakes or not before striking this pedestrian. The yellow, ane- mic abrasions occurred after the frst impact where the decedent sustained extensive central nervous system injury and a transected aorta. The anemic nature of this injury and yellow discoloration suggest decreased blood perfusion. The other injury shows red to brown discoloration, which is signifcant for vital reaction in an individual who had an intact beating heart with blood pressure. In one case the individual was thrown into another lane of traffic after being struck. The second motor vehicle driver denied hitting the individual, but the tire pattern was a match and there was forensic evidence found on the undersurface of his motor vehicle. Note the fap of skin being torn away from the leg as the tire rolled across the skin. Note the inguinal stretch marks caused by hyperextension of the hips and legs at the time of impact. Note the extensive trauma, far exceeding what one would typi- cally see in a single motor vehicle impact. This demonstrates the dangerous nature of motorcycle collisions even with high- quality protective gear. Note the separated body portions with extensive crush injury and axle grease from the train wheels. This is caused by grabbing and bracing oneself with the steering mechanism at the time of impact. These two pictures demonstrate large areas of contusion and ecchymosis following a femur fracture secondary to a standing height fall. Note the fattening of the body with extensive blunt force injury and fragmentation. Note the clotted adherent epidural hemorrhage within the temporal region of the skull. Note the membrane separa- In contrast, a chronic epidural hematoma generally leaves a tion with beading up away from the midline caused by fattened and less irregular cerebral cortex deformation. This hemorrhage occurred follow- ing a blunt impact to the face, causing hyperextension and rotation of the head with laceration of the right vertebral artery. These individuals lived from several hours to several days after the initial insult. Some areas of ecchymosis occurred in association with fresh needle marks from therapy. Hepatic cirrhosis is less commonly associated with laceration due to the increased fbrosis. A normal liver is the most common organ in the peritoneal cavity to lacerate in association with blunt force trauma. This indi- vidual sustained a comminuted skull fracture with mul- tiple central nervous system lacerations. There is also blister formation confned to this region associated with sepsis following infection associated with this trauma. Examples of these dent’s body consisted of slit-like perforations with multi- instruments include a knife, razor, box cutter, scalpel, ple, adjacent, parallel linear abrasions. Tis pattern injury sharp-edged piece of metal, broken glass bottle, broken is consistent with a serrated knife. Many of the images in glass window, scissor, ice pick, fork, propeller, screw driver, this chapter are designed to help with pattern recognition. Tis is in contrast to a blunt- force injury, where contact with the body is by a nonsharp Location and Direction of Injury object such as a baseball bat or the foor. Tis should be given with reference to a particular body A stab wound is typically made by a knife blade and position, usually standard anatomic planes. Each wound is defned as having a greater depth of penetration than should be documented by location on the body’s sur- surface dimension. An incised wound is a slicing-type face, and measured from vertical and horizontal planes injury where the surface dimension is greater than the of reference. Each injury anatomic planes are demonstrated with the body in an should have a documented location on the body, includ- upright position with the head tilted slightly upward, the ing a description of adjacent abrasions or contusions, legs together, the arms at the sides, and palms facing for- wound dimensions, depth of penetration, and direc- ward. Te head is superior and the feet inferior; medial tion of penetration into the body. Te posterior part of the body includes In cases where there are multiple injuries, it is acceptable the back, buttocks, and so on. It is good practice to take into or through the body should be given with reference overall photographs of the body before and afer clean- to three planes when possible: front–back, right–lef, and ing, as well as close-up photographs of each wound. Tis is important because it allows one to cor- Important aspects concerning interpretation of injury relate the injuries to possible assault descriptions and involve pattern recognition. One exam- ple where this would come in handy involved the arrest Wound Dimension of several suspects with diferent concealed weapons. Te police may approach you to render an opinion about Tis should be documented separately for each sharp- what type of weapon produced injuries so they can focus force injury, unless there are many that can be grouped their early investigation. Example: Tere are 319 320 Color Atlas of Forensic Medicine and Pathology twenty 1-inch to 2-inch by up to 1/4-inch, stab wounds Adjacent Abrasions and Contusions within a 5-inch to 7-inch region on the middle aspect of the right chest, which is centered 13 inches below Tese may indicate body contact from the knife handle, the top of the head and 4 inches to the right of the lower part of the knife blade, or the knife hilt. If the exists on the body and then again when in a relaxed knife blade penetrates a bone and there are hilt marks state. Te important aspect is to document the wound adjacent to the perforation site, one can extrapolate dimension in ranges that most closely refect the actual that the knife must have been stuck into the body with dimensions of the knife blade or instrument. A stab greater force than a blade that only penetrated half the wound can be put into a relaxed state by pressing the length of a blade. If the knife blade perforated a thick surrounding skin toward the wound and releasing bone, it would take great force. It is also acceptable to cut a square around the surrounding skin Injured Organs or Structures to release the tension. Tis can Tis information helps to allow interpretation of how make the surface dimension of the wound length and functional one might be afer an assault. It should part of the body, as with a tendon or peripheral nerve also be noted that sof tissue will change dimension being cut. Tis would Tis same concept applies for depth of penetra- help estimate how fast the individual would lose blood, tion as well. Dimensions should be given in a range and what the individual might be capable of doing afer to account for some changes when examined on the the injury, and for how long. Questions like this may autopsy table compared with the body position when come up in trial. Variables that may change tate someone more rapidly than a transected brachial this parameter while the assault is taking place include (arm) artery, which would be more rapid than a tran- deep breaths or exhalations, fexion, extension, rotation, sected cephalic (superfcial) vein. Someone with a stab the force used to infict the injury, the location on the wound to the heart will ofen lose consciousness within body including underlying bone or sof tissue, and so minutes but until then still be capable of running away, on. If someone is stabbed strongly in the abdomen when defending themselves, or continuing an assault, particu- relaxed, the blade may penetrate deeper than the length larly if the heart does not go into a lethal arrhythmia. It is important to take the sur- rounding skin tension into account when estimating the size and type of weapon used. Cuts between the ear and the mouth sometimes indicate a retaliation toward someone who informed the authorities. Note the varying dimensions and gaping nature due to the varying degrees of skin tension from underlying tissue planes in different locations. These wounds were then cut into a relaxed state and remeasured to help estimate the actual size of the knife blade.