Disposable Piercing Guide - WPTC12
Disposable surgical instruments are single-use medical devices that are used during surgery and discarded after use. Some examples of disposable surgical instruments include:
1. Scalpel 2. Tweezers 3. Scissors 4. Needle 5. Suture material 6. Surgical drapes 7. Surgical masks 8. Surgical gloves 9. Ironing pen 10. Trocar and cannula.
10. Laparoscopic instruments: Used for minimally invasive surgeries, these instruments include a camera and specialized tools for performing surgery through small incisions.
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2. Forceps: A tool used for grasping and holding tissues or organs during surgery.
3. Retractors: Surgical instruments used to hold open incisions or wounds to provide better visibility for the surgeon.
4. Scissors: Used for cutting tissues and sutures during surgery.
5. Hemostats: Used to clamp blood vessels and prevent bleeding during surgery.
6. Suction devices: Used to remove fluids or debris from the surgical site.
7. Needles: Used to suture or stitch wounds.
8. Electrocautery: A tool that uses an electrical current to cut or coagulate tissues during surgery.
9. Endoscopes: Used for minimally invasive surgeries, these instruments allow the surgeon to see inside the body without making large incisions.
The propagation of crape myrtle
Lagerstroemia indica, commonly known as crape myrtle, is native to China and belongs to the genus Lagerstroemia in the family Lythraceae. It has a long history of cultivation, with records dating back over 1500 years. This species plays an important role in summer landscapes in China due to its long blooming period and vibrant colors. As urban greening becomes increasingly popular, crape myrtle has gained more attention for its ornamental value.
Crape myrtle is a deciduous shrub or small tree that comes in various colors, including white (L. var. alba), lavender (L. var. amabilis), and pink (L. var. rubra). Recently, cultivars like 'Petite Pinkle' from the U.S. and Japan have been introduced, offering a range of flower colors such as pink, purple, white, and even pink with red and white borders. These varieties are compact, colorful, and easy to maintain, making them ideal for landscaping and garden use.
In terms of cultivation, crape myrtle is relatively hardy and adaptable. It thrives in well-drained, sandy, and fertile soils but can tolerate poor conditions. It prefers full sun, as insufficient light may lead to weak growth and reduced flowering. While it is cold-resistant, young plants need protection during the winter, while mature trees three years and older can survive without extra care.
This plant is drought-tolerant but sensitive to waterlogging. Watering should be done sparingly—once a year before spring growth and after autumn leaf fall. During rainy seasons, proper drainage is essential to prevent root rot. Fertilization is recommended after leaf fall in winter and before new growth in spring. Organic fertilizers like human urine or hemp sauce can enhance growth.
Pruning is crucial for shaping and promoting healthy growth. After autumn leaf fall, remove dead, crossing, or weak branches to encourage a strong canopy. Proper pruning helps the plant develop a good structure and increases flowering potential.
Crape myrtle is susceptible to pests such as aphids, scale insects, and leaf rollers. Insecticides like dimethoate EC (1000 times dilution) and dichlorvos (1500 times dilution) can be used to control infestations effectively.
Propagation is usually done through seeds or cuttings, with cuttings being the preferred method. It offers higher survival rates, faster growth, and earlier flowering. For seed propagation, collect ripe seeds in October, dry them, and store in a ventilated cloth bag. Before sowing in March, soak the seeds in a 0.2% potassium permanganate solution for 24–48 hours, then rinse and soak in warm water (40–50°C) for 2–3 days. Sow in open fields with rows spaced 20–25 cm apart, covering the seeds lightly and keeping the soil moist. Seedlings typically emerge within 50 days.
For cutting propagation, take semi-hardwood cuttings in late April or June. Cut 15–16 cm long stems, remove lower leaves, and insert into prepared sandy soil. Keep the soil moist and shaded until roots form, which usually takes about 40 days. With proper care, the plants can reach 30–60 cm in height within a year and bloom the following year.
The "cutting method" is a technique used to enhance flowering. By carefully managing watering, fertilization, and pruning, gardeners can significantly increase the number of blooms. Trimming the trunk at a certain height encourages new shoots to grow, forming a compact, bushy shape that enhances the ornamental value.
Dwarf crape myrtle varieties are particularly popular due to their adaptability. They thrive in warm, humid climates and are resistant to cold, drought, and poor soil conditions. These plants can survive in a wide range of environments, including urban areas. With proper care, they can be successfully grown in open fields across most regions of China.
Proper management includes regular watering for young plants, timely fertilization, and strategic pruning. Prune in spring, leaving 2–3 buds on each shoot to encourage new growth. Transplanting is best done before spring sprouting, and even during the growing season with shade, achieving high survival rates.
Overall, crape myrtle is a versatile and beautiful plant that adds color and charm to gardens and landscapes. With proper care and techniques, it can flourish and provide stunning floral displays year after year.