立體三維乳房攝影導引之真空輔助乳房組織切片術 (Tomo-guided Vacuum Assisted Biopsy)

立體三維乳房攝影導引之真空輔助乳房組織切片術（tomo-guided VAB）是一種微創的程序，利用三維乳房攝影技術，為乳房內無法觸及的疑似病變取樣。

以下為關於手術目的、術前準備、過程及術後護理的完整指南。

一、為什麼需要接受立體三維乳房攝影導引之真空輔助切片術

您的醫生建議進行此項檢查，是因為在例行篩查或診斷性三維乳房攝影中，發現了無法透過觸診摸到、且在超聲波檢查中無法清晰顯示的疑似病變（例如微鈣化點、結構扭曲或微小腫塊）。

立體三維乳房攝影（Tomosynthesis）能獲取乳房的切面影像，讓放射科醫生精準定位目標區域的深度與三維坐標（精確至毫米）。透過此影像系統導引真空輔助切片裝置，無需進行傳統開刀手術，即可進行精準且高取得率的組織取樣，以獲得明確的病理診斷，確定病變為良性或惡性。

二、術前準備

為確保程序順利及安全進行，請遵循以下關鍵準備步驟：

• 藥物調整：請告知醫療團隊您正在服用的所有藥物與補充劑。抗凝血藥物（如阿司匹林、華法林、氯吡格雷、新型口服抗凝藥）會增加出血風險。醫生會指導您是否及何時需要暫停服用。
• 過敏史：若您對局部麻醉藥（如利多卡因）、皮膚消毒劑或醫用膠布過敏，請提前通知醫療團隊。
• 衣著與首飾：請穿著舒適的兩件式衣物（如上衣配長褲/裙子），以便僅需解開上半身衣物。請勿配戴胸部或頸部的首飾及金屬配件。
• 皮膚用品：檢查當天請勿在腋下或乳房塗抹止汗劑、體香劑、爽身粉、護膚霜或乳液，因為這些物質可能殘留並在 X 光影像上呈現類似鈣化點的影子。
• 支撐性內衣：請準備一件合身且具良好支撐力的無鋼圈運動內衣，供術後佩戴，以固定敷料並對乳房保持適度壓迫。

三、手術過程

1. 定位與目標影像擷取：您將坐在專用的乳房攝影椅上，或俯臥於專用切片床上。乳房會接受輕柔壓迫以保持穩定。系統會拍攝一組三維乳房攝影影像，由電腦軟件計算出目標病變的精確三維坐標（x軸、y軸及深度）。
2. 局部麻醉：工作人員會使用消毒液澈底清潔皮膚。放射科醫生隨後將局部麻醉藥（如利多卡因）注射至皮膚及深層乳房組織。您會感到輕微刺痛或針紮感，隨後有發熱或涼意，之後乳房局部將麻木。
3. 插入真空探針：醫生會在皮膚上切開一個數毫米寬的微小切口。在實時電腦坐標導引下，放射科醫生將細長的真空輔助探針直接推進至目標位置。
4. 組織取樣：溫和的負壓吸引會將組織吸入探針開口，內部旋轉刀片會切下數塊微小樣本。由於真空裝置只需單次插入針頭即可收集多個樣本，因此無需重複進出針頭。您會聽到設備發出的咔噠聲或嗡嗡聲，感受到緊繃的壓迫感。
5. 放置切片標記物：在獲取足夠組織後，醫生會透過探針放置一枚微型金屬標記夾（通常由鈦金屬或不鏽鋼製成）於切片位置。該標記物將永久留存於乳房內，對日後的乳房攝影及磁力共振（MRI）檢查完全安全，並能確保日後如需手術時能精準定位。
6. 包紮：拔出探針後，醫生會對乳房進行 10 至 15 分鐘的手動按壓以止血。微小切口上會貼上保護性敷料，無需縫針。

四、可能出現的併發症

立體三維乳房攝影導引真空輔助切片術是一項低風險的門診程序。然而，與任何微創醫療操作一樣，可能會出現輕微副作用或罕見併發症：

• 瘀傷與腫脹（血腫）：切片部位周圍出現輕微至中度瘀傷非常普遍，通常在 1 至 2 週內自行消退。偶爾可能形成局部積血（血腫），表現為硬塊，隨時間會逐漸吸收。
• 輕微疼痛或酸痛：局部麻醉藥效消退後，針孔處或乳房深層出現壓痛屬正常現象，通常數天內會緩解。
• 出血：術後短期內切口可能會有滲血。
• 感染：極為罕見（少於 1% 的病例），表現為局部紅腫加劇、發熱、腫脹或有膿液流出。
• 迷走神經反應：部分患者在壓迫或進針過程中可能會感到頭暈、眩暈或噁心。
• 過敏反應：對局部麻醉藥、消毒劑或醫用膠布產生過敏，情況罕見。

五、術後傷口護理

• 休息與活動：當天請充分休息。術後 24 至 48 小時內請避免搬運重物、劇烈運動或劇烈上半身活動，以降低出血及血腫風險。
• 佩戴支撐性內衣：術後首 24 至 48 小時內請持續佩戴合身的運動內衣（包括睡眠時），對切片部位保持穩定溫和的壓迫。
• 止痛管理：如感到酸痛，可按需要服用非處方乙醯氨基酚（Tylenol / Paracetamol）。術後 48 小時內請避免服用阿司匹林，除非醫生另有指示，因為這些藥物會稀釋血液並增加瘀傷風險。
• 冷敷：在術後首 24 小時內，可用毛巾包裹冰袋，隔著內衣冷敷切片區域，每次 15 至 20 分鐘，有助減輕腫脹與不適。
• 洗澡：術後首 24 至 48 小時內請保持敷料乾燥。此後可進行輕柔淋浴，洗完後用乾淨毛巾輕輕擦乾，切勿搓擦。
• 清潔傷口：需每日清潔傷口並更換敷料，或按需要增加更換頻率。

六、如何處理傷口出血及預防傷口感染

處理傷口出血

1. 施加直接緊壓：若發現有鮮血滲出敷料，請坐下並保持冷靜，使用乾淨毛巾或紗布直接按壓切片位置，持續緊壓 15 至 20 分鐘，期間切勿抬起查看。
2. 靜臥冰敷：靜臥休息，同時在按壓墊上方進行冰敷。
3. 何時尋求緊急醫療協助：若持續直接按壓 20 分鐘後仍無法止血，或發現切片部位出現迅速擴大的疼痛性腫脹，請立即聯絡診所、醫生或前往最近的急症室。

預防傷口感染

• 保持乾燥：在皮膚切口完全癒合前（通常需要 7 至 10 天），切勿將傷口浸泡於水中，請避免浸浴、游泳、水療及桑拿。
• 註重手部衛生：在觸碰切片區域或更換敷料前，請務必使用肥皂及清水澈底洗手。
• 切勿摳抓傷口：讓結痂自然脫落。除非醫療團隊明確指示，否則切勿在傷口上塗抹未經處方的軟膏或偏方。
• 密切觀察感染徵象：若出現發燒（體溫高於 38°C）、傷口周圍紅腫範圍擴大、皮膚發熱、劇烈或持續加重的疼痛，或切口流出黃綠色分泌物，請立即聯絡醫生。

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Tomosynthesis-Guided Vacuum-Assisted Breast Biopsy (Tomo-guided Vacuum Assisted Biopsy)

Tomosynthesis-guided vacuum-assisted breast biopsy (tomo-guided VAB) is a minimally invasive procedure that uses 3D mammography technology to sample non-palpable, suspicious areas within the breast.

Below is a comprehensive guide regarding the purpose, preparation, procedure, and post-procedure care.

1. Why You Need to Undergo Tomo-Guided VAB

Your doctor has recommended this procedure because routine screening or diagnostic 3D mammography revealed a suspicious area—such as microcalcifications, architectural distortion, or a small mass—that cannot be felt by hand and is not clearly visible on an ultrasound scan.

Tomosynthesis (3D mammography) captures cross-sectional images of the breast, allowing the radiologist to pinpoint the exact depth and 3D coordinates (accurate down to the millimeter) of the target area. Guiding a vacuum-assisted biopsy device through this imaging system allows for precise, high-yield tissue sampling without open surgery, providing a definitive pathological diagnosis to determine whether the lesion is benign or malignant.

2. Preparation for the Procedure

To ensure the procedure goes smoothly and safely, please follow these key preparation steps:

• Medication Adjustments: Inform your medical team about all medications and supplements you take. Blood thinners (e.g., aspirin, warfarin, clopidogrel, NOACs) and nonsteroidal anti-inflammatory drugs (NSAIDs) can increase bleeding risk. Your doctor will advise you on whether and when you need to pause taking them.
• Allergies: Notify your medical team in advance if you have any allergies to local anesthetics (e.g., xylocaine, lidocaine), skin antiseptics, or medical adhesives/tapes.
• Clothing & Jewelry: Wear comfortable two-piece clothing (e.g., a top with pants or a skirt) so you only need to uncover your upper body. Do not wear jewelry or metal accessories around your chest or neck.
• Skin Products: On the day of the procedure, do not apply deodorants, antiperspirants, talcum powders, skin creams, or lotions under your arms or on your breasts, as these substances can leave residues that mimic calcifications on x-rays.
• Supportive Bra: Bring a well-fitting, supportive sports bra (without underwire) to wear after the procedure to hold dressings in place and maintain gentle compression on the breast.

3. The Procedure

1. Positioning and Target Imaging: You will sit in a specialized mammography chair or lie face down on a dedicated biopsy table. The breast is gently compressed to hold it steady. A set of 3D mammography images is taken, and computer software calculates the exact 3D coordinates (x-axis, y-axis, and depth) of the target lesion.
2. Local Anesthesia: The medical team will thoroughly cleanse your skin with an antiseptic solution. The radiologist will then inject local anesthetic (e.g., xylocaine, lidocaine) into the skin and deeper breast tissue. You will feel a slight sting or pinch, followed by a sensation of warmth or coolness, after which the local area of the breast will become numb.
3. Inserting the Vacuum Probe: The doctor will make a nick a few millimeters wide in the skin. Guided by real-time computer coordinates, the radiologist advances the thin vacuum-assisted probe directly to the target location.
4. Tissue Sampling: Gentle negative pressure draws tissue into the probe's opening, and a rotating internal blade cuts several small samples. Because the vacuum device gathers multiple samples through a single needle insertion, there is no need to insert and remove the needle repeatedly. You will hear clicking or humming sounds from the equipment and feel firm pressure.
5. Biopsy Marker Placement: Once sufficient tissue is retrieved, the doctor deploys a micro-metal marker clip (usually titanium or stainless steel) through the probe at the biopsy site. This marker remains permanently in the breast, is completely safe for future mammograms and MRIs, and ensures precise localization should surgery be needed in the future.
6. Bandaging: After removing the probe, the doctor applies manual pressure to the breast for 10 to 15 minutes to stop bleeding. Protective dressings are applied over the tiny incision; no stitches are required.

4. Possible Complications

Tomo-guided vacuum-assisted breast biopsy is a low-risk outpatient procedure. However, as with any minimally invasive medical intervention, mild side effects or rare complications may occur:

• Bruising and Swelling (Hematoma): Mild to moderate bruising around the biopsy site is very common and usually resolves spontaneously within 1 to 2 weeks. Occasionally, localized blood pooling (a hematoma) can form as a firm lump, which will gradually reabsorb over time.
• Mild Pain or Soreness: Tenderness at the puncture site or deep within the breast after the local anesthesia wears off is normal and usually subsides within a few days.
• Bleeding: Minor oozing from the incision may occur in the short term after the procedure.
• Infection: Extremely rare (less than 1% of cases), characterized by worsening redness, warmth, swelling, or pus drainage.
• Vasovagal Response: Some patients may experience lightheadedness, dizziness, or nausea during compression or needle insertion.
• Allergic Reaction: Rare allergic reactions to local anesthetics, antiseptics, or medical tape.

5. Post-Procedure Wound Care

• Rest and Activity: Rest adequately on the day of the procedure. Avoid heavy lifting, vigorous exercise, or intense upper-body activity for 24 to 48 hours to reduce the risk of bleeding and hematoma.
• Supportive Bra: Wear a well-fitting sports bra continuously for the first 24 to 48 hours (including while sleeping) to maintain steady, gentle compression over the biopsy site.
• Pain Management: If you feel sore, take over-the-counter acetaminophen (Tylenol / Paracetamol) as needed. Avoid taking aspirin for 48 hours after the procedure unless instructed by your doctor, as it thins the blood and increases bruising risk.
• Cold Therapy: Apply an ice pack wrapped in a towel over your bra to the biopsy area for 15 to 20 minutes at a time during the first 24 hours to help reduce swelling and discomfort.
• Showering: Keep the dressing dry for the first 24 to 48 hours. Afterward, you may shower gently and pat dry with a clean towel; do not scrub.
• Wound Cleansing: Cleanse the wound and change dressings daily, or more frequently as needed.

6. Dealing with Bleeding and Preventing Infection

Dealing with Wound Bleeding

1. Apply Direct Firm Pressure: If you notice fresh blood oozing through the dressing, sit down and stay calm. Use a clean towel or gauze to press directly on the biopsy site with continuous firm pressure for 15 to 20 minutes without lifting to check.
2. Rest with Cold Therapy: Rest quietly while applying an ice pack over the pressure pad.
3. When to Seek Emergency Care: If bleeding continues despite 20 minutes of uninterrupted direct pressure, or if you notice rapid, painful swelling at the biopsy site, contact your clinic or doctor immediately, or go to the nearest emergency department.

Preventing Wound Infection

• Keep Dry: Avoid submerging the wound in water (no baths, swimming, hot tubs, or saunas) until the skin incision has fully healed (usually takes 7 to 10 days).
• Practice Hand Hygiene: Wash your hands thoroughly with soap and water before touching the biopsy area or changing dressings.
• Do Not Pick at the Wound: Allow scabs to detach naturally. Do not apply unprescribed ointments or home remedies to the wound unless explicitly instructed by your medical team.
• Monitor for Signs of Infection: Contact your doctor immediately if you develop a fever (temperature above 38°C / 100.4°F), spreading redness around the wound, skin that feels hot to the touch, severe or worsening pain, or yellow-green discharge from the incision.